Femto Sec Tech, Inc. v. Alcon LenSx, Inc., 8-15-cv-00624 (CACD May 16, 2017, Order) (Selna, USDJ)
Thursday, May 18, 2017
Patentee May Not Modify Conception Date Disclosed in Infringement Contentions With Supplemental Interrogatory Response
The court granted defendant's motion to strike plaintiff's supplemental interrogatory response and precluded plaintiff from asserting a conception date at trial earlier than the date disclosed in its preliminary infringement contentions. "[Plaintiff] had to disclose a specific date of conception and produce documentary evidence of that conception date in its Patent Local Rule disclosures. . . . [A]lthough [plaintiff] may have disclosed its proposed conception date in time for [defendant] to conduct discovery, that does not cure any prejudice resulting from [plaintiff's] failure to follow the local rules that 'require patent holders to ‘crystallize their theories of the case early in the litigation’ . . . . This poses a minimal burden for a patent holder, who should already know the conception date of a patented invention prior to commencing litigation.'. . . To the extent that [plaintiff] altered its conception date and evidence based on discovery, it had to amend its Rule 3 disclosures to include those changes. Because [plaintiff] did not do so, it cannot argue an earlier conception date than [its originally disclosed date], with respect to [defendant's] prior art."