Partner
Kassandra (Kassi) Officer focuses on complex, high-stakes patent and trade secret litigation before U.S. district courts as well as post-grant proceedings before the Patent Trial and Appeal Board (PTAB) of the U.S. Patent and Trademark Office (USPTO). Her practice encompasses a wide range of technologies, with an emphasis on chemicals, pharmaceuticals, and agricultural products. Kassi currently serves as one of the partners-in-charge of pro bono at Finnegan.
Kassi represents pharmaceutical patent holders in litigations arising under the Hatch-Waxman Act and the Biologics Price Competition and Innovation Act (BPCIA); agricultural companies in patent infringement and breach of contract litigations; and plaintiffs and defendants in trade secret misappropriation actions. Her experience covers all aspects of trial preparation, including managing day-to-day litigation activities; conducting offensive and defensive discovery; taking and defending fact and expert depositions; preparing for and taking witnesses at trial; delivering closing arguments; and drafting post-trial briefing. Kassi also counsels clients regarding quarantine and clean-room redesign procedures.
Kassi represents clients in inter partes review (IPR), ex parte reexamination (EPR), and other contested proceedings before the PTAB. Her experience includes developing validity positions, drafting written submissions, preparing and defending technical expert witnesses, and arguing before the Board. Kassi also has an active patent prosecution and counseling practice, preparing and prosecuting U.S. patent applications on behalf of international clients, with a focus on chemical subject matter, including pharmaceutical and veterinary drug products.
Kassi has a robust background in a wide variety of chemical, pharmaceutical, agricultural, mechanical, and electrical technologies. She has worked on cases involving chemical manufacturing processes, polymers, small molecule drugs and biologics, genetically modified seeds and agrochemicals, automotive products, consumer electronics, database management systems, neural networks, and wireless communications
As one of the partners-in-charge of pro bono at Finnegan, Kassi draws on her experience in supporting the firm’s programs. She assists veterans with claims before the U.S. Court of Appeals for Veterans Claims and the U.S. Court of Appeals for the Federal Circuit. She also assists immigrants seeking asylum and inmates seeking post-conviction relief. Kassi is involved in the firm’s business initiative Finnegan FORWARD (Focused on Raising Women’s Advancement, Representation, and Development).
Arvinas Operations, Inc. et al. v. Qian et al.
Defending Accutar Biotechnology, Inc. in a trade secret lawsuit brought by Arvinas regarding alleged trade secrets concerning breast cancer therapies.
3:22-cv-00717, D. Conn., Judges Chatigny, Richardson
Jumio Corporation v. FaceTec, Inc.
Representing FaceTec, Inc. in four inter partes reviews (IPRs) relating to groundbreaking 3D liveness detection technology.
IPR2025-00106, -00107, -00108, -00109, PTAB, Judges Khan, Hoang, Baer
Bayer Cropscience LP et al. v. Corteva Agriscience LLC et al.
Successfully represented defendant Corteva in a Delaware state court action for breach of contract arising out of a patent cross-license agreement relating to Agrobacterium-mediated plant transformation and transgenic seeds, resulting in case-dispositive summary judgment in Corteva’s favor.
N22C-07-168, Delaware Superior Court, Complex Commercial Litigation Division
Mylan Pharmaceuticals Inc. v. Bausch Health Ireland Ltd.
IPR2022-00722, -01102, -01103, -01104, -01105, IPR2023-00016, PTAB, Judges Hardman, Hulse, Sheridan, Valek
26-1595, Fed. Cir.
1:21-cv-00611, D. Del., Judge Stark
2:21-cv-10057, -10403, 2:23-cv-00170, -03333, 2:24-cv-07182, -11179, D.N.J., Judge Chesler
2:21-cv-00573, W.D. Pa., Judges Cercone, Hardy
1:22-cv-00020, -00085, 1:24-cv-00036, 1:25-cv-00003, N.D.W. Va., Judge Kleeh
AbbVie Inc. et al v. Alvotech hf.
Represented AbbVie Inc. in Biologics Price Competition and Innovation (BPCIA) litigation related to Humira®
1:21-cv-02258, 1:21-cv-02899, N.D. Ill., Judge Lee
E. I. du Pont de Nemours v. Synvina C.V.
Represented DuPont and ADM in a successful Federal Circuit appeal from an IPR proceeding, resulting in reversal of the PTAB’s decision and invalidation of all challenged claims of Synvina’s patent directed to production of 2,5-furan dicarboxylic acid.
17-1977, Fed. Cir.
Articles
Trending at the PTAB: Petitioners' Settled Expectations Trending at the PTAB: Petitioners' Settled Expectations
October 1, 2025
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PTAB Developments, Including Discretionary Denials and Related Procedures PTAB Developments, Including Discretionary Denials and Related Procedures
July 24, 2025
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Observations on One Year of IPR and PGR Institution Denials and Final Written Decisions: Life Sciences Observations on One Year of IPR and PGR Institution Denials and Final Written Decisions: Life Sciences
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August 13, 2024
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Finnegan Earns Top Rankings in 2026 IAM Patent 1000 Guide; Nearly 60 Attorneys Ranked Finnegan Earns Top Rankings in 2026 IAM Patent 1000 Guide; Nearly 60 Attorneys Ranked
May 28, 2026
Intellectual Asset Management (IAM)Award/Ranking
Best Lawyers Recognizes 44 Finnegan Attorneys in its 2026 Edition of The Best Lawyers and Ones to Watch Best Lawyers Recognizes 44 Finnegan Attorneys in its 2026 Edition of The Best Lawyers and Ones to Watch
August 21, 2025
Best LawyersAward/Ranking
31 Finnegan Attorneys Recognized by Best Lawyers 31 Finnegan Attorneys Recognized by Best Lawyers
August 15, 2024
Best LawyersPress Release
32 Finnegan Attorneys Recognized by Best Lawyers 32 Finnegan Attorneys Recognized by Best Lawyers
August 17, 2023
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