At the ITC, In the Matter of Certain Coenzyme Q10 Products and Methods of Making Same (April 3, 2012), Judge Rogers (337-TA-790) denied Respondents' motion to supplement their invalidity contentions as to a single prior art reference. Respondents' requested supplementation to add the Kanazawa article based on the explanation that the article

was not uncovered until ... counsel ... reviewed the prosecution history of U.S. Patent No. 5,011,858.

In denying the requested supplement for the Kanazawa prior art for "good cause" under Ground Rule 5, governing notice of prior art, Judge Rogers repeated his guidance provided at an earlier hearing concerning Ground Rule 5:

[Ground] Rule 5 talks about notices of prior art. There is a date in the procedural schedule for filing the notice of prior art. That's a not later than date, and if you are late doing it, and you haven't filed it timely, then proof of the matters related to that prior art that's not timely will not be allowed in evidence at the trial, unless you show good cause by a written motion, and the fact that your expert couldn't find the references is not adequate for good cause.

(Order at 2). Judge Rogers reasoned that he warned the Respondents about this situation at the preliminary conference, and therefore denied the proposed amendment to their notices of prior art.

Takeaways - Judge Rogers focused on the fact that identifying prior art after the notice date would only be permitted for good cause, and failure to locate a reference does not constitute good cause. It was also noted that the Kanazawa prior art was a publicly-available reference. With such tight time frames in the ITC, it appears there was little the Respondents could due once the notice period expired, except identify some other rationale to support the "good cause" requirement, different from explaining why the reference could not be found earlier.