United States: PTAB Designates Seven Recent Decisions As Informative

ZTE Corp. v. ContentGuard Holdings, Inc.; Intelligent Bio-Systems, Inc. v. Illumina Cambridge Limited; Medtronic, Inc. v. Robert Bosch Healthcare Systems, Inc.; Unilever, Inc. v. Proctor & Gamble Co.; Prism Pharma Co., Ltd. v. Choongwae Pharma Corporation; Unified Patents, Inc. v. Personal Web Technologies, LLC and Level 3 Communications, LLC; and Medtronic, Inc. v. Nuvasive, Inc.

The Patent Trial and Appeal Board (PTAB) recently designated seven decisions from inter partes review (IPR) proceedings as informative opinions: ZTE Corp. v. ContentGuard Holdings, Inc., Case No. IPR2013-00454 (PTAB, Sept. 25, 2013) (Kim, APJ); Intelligent Bio-Systems, Inc.  v. Illumina Cambridge Limited, Case No. IPR2013-00324 (PTAB, Nov. 21, 2013) (Crumbley, APJ); Medtronic, Inc. v. Robert Bosch Healthcare Systems, Inc., Case No. IPR2014-00436 (PTAB, June 19, 2014) (Quinn, APJ); Unilever, Inc. v. Proctor & Gamble Co., Case No. IPR2014-00506 (PTAB, July 7, 2014) (Obermann, APJ); Prism Pharma Co., Ltd. v. Choongwae Pharma Corporation, Case No. IPR2014-00315 (PTAB, July 8, 2014) (Yang, APJ); Unified Patents, Inc. v. Personal Web Technologies, LLC and Level 3 Communications, LLC, Case No. IPR2014-00702 (PTAB, July 24, 2014) (Zecher, APJ); and Medtronic, Inc. v. Nuvasive, Inc., Case No. IPR2013-00487 (PTAB, Sept. 11, 2014) (Green, APJ).

In all of these opinions, denied institution under 35 U.S.C. § 325(d), which states: "In determining whether to institute or order a preceding under . . . chapter 31, the Director may take into account whether, and reject the petition or request because, the same or substantially the same prior art or arguments previously presented to the Office." 

In ZTE Corp. v. ContentGuard Holdings, Inc. ( IP Update, Vol. 17, No. 8) the petitioner filed a petition against claims in a patent for which it had previously filed an IPR petition.  The earlier IPR petition sought review of all claims of the challenged patent, but the Board instituted review on just a subset of the claims. ZTE filed the second petition to challenge the claims not under review in the first IPR.  While the second petition was not timely under 35 U.S.C. § 315(b), ZTE filed it with a motion for joinder of the proceeding with the first IPR proceeding.  The motion for joinder was denied however, because the earlier proceeding was terminated as the patent owner had filed a request for, and was granted, adverse judgment.

In Intelligent Bio-Systems, Inc. v. Illumina Cambridge Limited ( IP Update , Vol. 17, No. 9) the petitioner filed a petition seeking review of all claims of the challenged patent. In an earlier, co-pending IPR proceeding, the Petitioner had sought review of all claims of the same patent.  The second petition was filed because the petitioner became aware of the relevance of certain prior art only after the filing of the first petition. The Board found that the second petition presented the same or substantially the same prior art and arguments as the first. In the first proceeding, the patent owner filed a non-contingent motion to amend the claims, which requested cancellation of claims 1-8 and entry of substitute claims.  The Board noted that because the patent owner had submitted the new prior art as part of its motion to amend claims, that prior art would be considered by the Board in the first proceeding.

In Medtronic, Inc. v. Robert Bosch Healthcare Systems, Inc. the petitioner sought review of the same patent that its recently acquired entity, Cardiocom, had challenged in a prior IPR proceeding. The Board denied two of Medtronic's obviousness-based grounds as being the same or substantially the same as those in the earlier IPR.  The remaining grounds were rejected because the Board discerned that there was insufficient evidence of a reasonable rationale for the combination of prior art.

In Unilever, Inc. v. Proctor & Gamble Co. the Board denied Unilever's IPR petition because each ground alleged obviousness over one or more prior art references raised in an earlier petition filed by Unilever for the same patent. The Board found that the later petition was essentially an attempt to cure the grounds in the first petition which were not instituted: "the instant Petition uses our prior Decision on Institution to bolster challenges that were advanced, unsuccessfully, in the [earlier] Petition." 

In Prism Pharma Co., Ltd. v. Choongwae Pharma Corporation the Board denied institution because the cited prior art had been considered during the original prosecution of the challenged patent.  The petitioner, who was a co-inventor of the challenged patent, had filed his own application containing similar subject matter as the challenged patent.  In at least two declarations submitted by the petitioner in support of his challenge, the petitioner explained how his published application anticipated the challenged patent. The Board noted that ultimately the examiner and the examiner's supervisor concluded that the claims were patentable over that reference.

In Unified Patents, Inc. v. Personal Web Technologies, LLC and Level 3 Communications, LLC, the Board denied the petition based on co-pending IPR proceedings initiated by third parties against the same patent. The petitioner's grounds of invalidity were based on a single prior art reference, and each of the prior proceedings presented grounds of unpatentability based on the same piece of prior art for many of the claims. The Board noted that in one of the prior proceedings, the patent owner had appealed the Board's decision that most of the challenged claims were unpatentable to the Federal Circuit and, further, that all of the challenged claims were under review in the other proceeding.

In Medtronic, Inc. v. Nuvasive, Inc. the Board denied the petition as essentially being an attempt to cure a previous petition for which institution was denied.  The Board also noted that another prior petition filed by the petitioner against the same patent involved all of the challenged claims in the petition.

Practice Note:  The designation of these opinions as "informative" is a signal that the PTAB will, when possible, avoid duplicating review of the same art or arguments previously submitted for a given patent.  The opinions also make clear that petitioners seeking to further challenge claims for which institution was initially unsuccessful should not expect to be able to rehabilitate the initial grounds by simply substituting new prior art for old. More meaningful changes, such as relying on new primary references, will be needed to avoid an invocation of 35 U.S.C. § 325(d).

PTAB Designates Seven Recent Decisions As Informative

The content of this article is intended to provide a general guide to the subject matter. Specialist advice should be sought about your specific circumstances.

To print this article, all you need is to be registered on Mondaq.com.

Click to Login as an existing user or Register so you can print this article.

In association with
Related Video
Up-coming Events Search
Font Size:
Mondaq on Twitter
Register for Access and our Free Biweekly Alert for
This service is completely free. Access 250,000 archived articles from 100+ countries and get a personalised email twice a week covering developments (and yes, our lawyers like to think you’ve read our Disclaimer).
Email Address
Company Name
Confirm Password
Mondaq Topics -- Select your Interests
 Law Performance
 Law Practice
 Media & IT
 Real Estate
 Wealth Mgt
Asia Pacific
European Union
Latin America
Middle East
United States
Worldwide Updates
Check to state you have read and
agree to our Terms and Conditions

Terms & Conditions and Privacy Statement

Mondaq.com (the Website) is owned and managed by Mondaq Ltd and as a user you are granted a non-exclusive, revocable license to access the Website under its terms and conditions of use. Your use of the Website constitutes your agreement to the following terms and conditions of use. Mondaq Ltd may terminate your use of the Website if you are in breach of these terms and conditions or if Mondaq Ltd decides to terminate your license of use for whatever reason.

Use of www.mondaq.com

You may use the Website but are required to register as a user if you wish to read the full text of the content and articles available (the Content). You may not modify, publish, transmit, transfer or sell, reproduce, create derivative works from, distribute, perform, link, display, or in any way exploit any of the Content, in whole or in part, except as expressly permitted in these terms & conditions or with the prior written consent of Mondaq Ltd. You may not use electronic or other means to extract details or information about Mondaq.com’s content, users or contributors in order to offer them any services or products which compete directly or indirectly with Mondaq Ltd’s services and products.


Mondaq Ltd and/or its respective suppliers make no representations about the suitability of the information contained in the documents and related graphics published on this server for any purpose. All such documents and related graphics are provided "as is" without warranty of any kind. Mondaq Ltd and/or its respective suppliers hereby disclaim all warranties and conditions with regard to this information, including all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement. In no event shall Mondaq Ltd and/or its respective suppliers be liable for any special, indirect or consequential damages or any damages whatsoever resulting from loss of use, data or profits, whether in an action of contract, negligence or other tortious action, arising out of or in connection with the use or performance of information available from this server.

The documents and related graphics published on this server could include technical inaccuracies or typographical errors. Changes are periodically added to the information herein. Mondaq Ltd and/or its respective suppliers may make improvements and/or changes in the product(s) and/or the program(s) described herein at any time.


Mondaq Ltd requires you to register and provide information that personally identifies you, including what sort of information you are interested in, for three primary purposes:

  • To allow you to personalize the Mondaq websites you are visiting.
  • To enable features such as password reminder, newsletter alerts, email a colleague, and linking from Mondaq (and its affiliate sites) to your website.
  • To produce demographic feedback for our information providers who provide information free for your use.

Mondaq (and its affiliate sites) do not sell or provide your details to third parties other than information providers. The reason we provide our information providers with this information is so that they can measure the response their articles are receiving and provide you with information about their products and services.

If you do not want us to provide your name and email address you may opt out by clicking here .

If you do not wish to receive any future announcements of products and services offered by Mondaq by clicking here .

Information Collection and Use

We require site users to register with Mondaq (and its affiliate sites) to view the free information on the site. We also collect information from our users at several different points on the websites: this is so that we can customise the sites according to individual usage, provide 'session-aware' functionality, and ensure that content is acquired and developed appropriately. This gives us an overall picture of our user profiles, which in turn shows to our Editorial Contributors the type of person they are reaching by posting articles on Mondaq (and its affiliate sites) – meaning more free content for registered users.

We are only able to provide the material on the Mondaq (and its affiliate sites) site free to site visitors because we can pass on information about the pages that users are viewing and the personal information users provide to us (e.g. email addresses) to reputable contributing firms such as law firms who author those pages. We do not sell or rent information to anyone else other than the authors of those pages, who may change from time to time. Should you wish us not to disclose your details to any of these parties, please tick the box above or tick the box marked "Opt out of Registration Information Disclosure" on the Your Profile page. We and our author organisations may only contact you via email or other means if you allow us to do so. Users can opt out of contact when they register on the site, or send an email to unsubscribe@mondaq.com with “no disclosure” in the subject heading

Mondaq News Alerts

In order to receive Mondaq News Alerts, users have to complete a separate registration form. This is a personalised service where users choose regions and topics of interest and we send it only to those users who have requested it. Users can stop receiving these Alerts by going to the Mondaq News Alerts page and deselecting all interest areas. In the same way users can amend their personal preferences to add or remove subject areas.


A cookie is a small text file written to a user’s hard drive that contains an identifying user number. The cookies do not contain any personal information about users. We use the cookie so users do not have to log in every time they use the service and the cookie will automatically expire if you do not visit the Mondaq website (or its affiliate sites) for 12 months. We also use the cookie to personalise a user's experience of the site (for example to show information specific to a user's region). As the Mondaq sites are fully personalised and cookies are essential to its core technology the site will function unpredictably with browsers that do not support cookies - or where cookies are disabled (in these circumstances we advise you to attempt to locate the information you require elsewhere on the web). However if you are concerned about the presence of a Mondaq cookie on your machine you can also choose to expire the cookie immediately (remove it) by selecting the 'Log Off' menu option as the last thing you do when you use the site.

Some of our business partners may use cookies on our site (for example, advertisers). However, we have no access to or control over these cookies and we are not aware of any at present that do so.

Log Files

We use IP addresses to analyse trends, administer the site, track movement, and gather broad demographic information for aggregate use. IP addresses are not linked to personally identifiable information.


This web site contains links to other sites. Please be aware that Mondaq (or its affiliate sites) are not responsible for the privacy practices of such other sites. We encourage our users to be aware when they leave our site and to read the privacy statements of these third party sites. This privacy statement applies solely to information collected by this Web site.

Surveys & Contests

From time-to-time our site requests information from users via surveys or contests. Participation in these surveys or contests is completely voluntary and the user therefore has a choice whether or not to disclose any information requested. Information requested may include contact information (such as name and delivery address), and demographic information (such as postcode, age level). Contact information will be used to notify the winners and award prizes. Survey information will be used for purposes of monitoring or improving the functionality of the site.


If a user elects to use our referral service for informing a friend about our site, we ask them for the friend’s name and email address. Mondaq stores this information and may contact the friend to invite them to register with Mondaq, but they will not be contacted more than once. The friend may contact Mondaq to request the removal of this information from our database.


From time to time Mondaq may send you emails promoting Mondaq services including new services. You may opt out of receiving such emails by clicking below.

*** If you do not wish to receive any future announcements of services offered by Mondaq you may opt out by clicking here .


This website takes every reasonable precaution to protect our users’ information. When users submit sensitive information via the website, your information is protected using firewalls and other security technology. If you have any questions about the security at our website, you can send an email to webmaster@mondaq.com.

Correcting/Updating Personal Information

If a user’s personally identifiable information changes (such as postcode), or if a user no longer desires our service, we will endeavour to provide a way to correct, update or remove that user’s personal data provided to us. This can usually be done at the “Your Profile” page or by sending an email to EditorialAdvisor@mondaq.com.

Notification of Changes

If we decide to change our Terms & Conditions or Privacy Policy, we will post those changes on our site so our users are always aware of what information we collect, how we use it, and under what circumstances, if any, we disclose it. If at any point we decide to use personally identifiable information in a manner different from that stated at the time it was collected, we will notify users by way of an email. Users will have a choice as to whether or not we use their information in this different manner. We will use information in accordance with the privacy policy under which the information was collected.

How to contact Mondaq

You can contact us with comments or queries at enquiries@mondaq.com.

If for some reason you believe Mondaq Ltd. has not adhered to these principles, please notify us by e-mail at problems@mondaq.com and we will use commercially reasonable efforts to determine and correct the problem promptly.