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Finnegan
Leith S. Shafi
Associate
More
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  • 901 New York Avenue, NW
  • Washington, DC 20001-4413
+1 202 408 4231
leith.shafi@finnegan.com leith.shafi@finnegan.com

Leith S. Shafi

Associate

  • +1 202 408 4231 +1 202 408 4231
  • leith.shafi@finnegan.com leith.shafi@finnegan.com
  • 901 New York Avenue, NW
  • Washington, DC 20001-4413
  • vCard

Leith Shafi, a former primary patent examiner at the U.S. Patent and Trademark Office (USPTO), leverages his technical expertise in the chemical and materials science arts to assist clients with their patent prosecution needs.

During his nine years at the USPTO, Leith authored over a thousand office actions, responded to several appeal briefs before the Patent Trial and Appeal Board (PTAB), and granted hundreds of patents, employing a collaborative approach with attorneys and inventors. He trained new examiners on the intricacies of patent prosecution and served as a Quality Nominee for the additive manufacturing, nanolithography, and plastic molding technology areas. His USPTO experience includes working with three PTAB judges, drafting ex parte appeal and inter partes review (IPR) decisions for disputes involving e-cigarettes, cosmetic formulations, semiconductors, and smartwatch oximeters.

As a law student, Leith worked as a staff editor for the Georgetown Law Technology Review, covering topics such as smart contracts, facial recognition's impact on First Amendment protections, third-party doctrine, and privacy law. During his graduate studies, Leith joined efforts with scientists and engineers to work on projects ranging from plasma-assisted catalysis to 3D printed nanothermite.

Leith has volunteered to judge for the Collegiate Inventors Competition and several middle school science fairs. He is committed to encouraging the next generation of inventors to take their ideas to the next level.

Et Cetera

  • Staff editor, Georgetown Law Technology Review, 2021-2024.
  • Recipient, USPTO On-The-Spot Award, 2022.
  • Recipient, American Intellectual Property Law Association USPTO Outstanding Employee Award, 2021.

Experience

Pioneer Hi-Bred International, Inc. et al. v. Syngenta Seeds, LLC

Representing plaintiff Pioneer in a district court patent infringement litigation involving methods for producing doubled haploid maize plants.

1:22-cv-01280, D. Del.

Bayer Cropscience LP et al. v. Corteva Agriscience LLC et al.

Representing 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.

N22C-07-168, Delaware Superior Court, Complex Commercial Litigation Division

Corteva Agriscience LLC v. Monsanto Company et al.

Representing plaintiff Corteva Agriscience in a district court patent infringement litigation involving transgenic plants and plant cells that produce enzymes conferring herbicide resistance.

1:22-cv-01046, D. Del., Judge Williams

Insights

Federal Circuit IP Blog

The Power of Policy: Fintiv Remains Intact at the PTAB The Power of Policy: Fintiv Remains Intact at the PTAB

March 12, 2026

Webinar

Protect Your Innovations: Recent Patent Case Law in the Life Sciences

Protect Your Innovations: Recent Patent Case Law in the Life Sciences Protect Your Innovations: Recent Patent Case Law in the Life Sciences

February 11, 2026

Webinar

Federal Circuit IP Blog

Interference Estoppel Reviewability Shenanigans? The Federal Circuit Thinks Not Interference Estoppel Reviewability Shenanigans? The Federal Circuit Thinks Not

August 8, 2025

Articles

Trending at the PTAB: Shifts in Parallel Proceedings Strategy

Trending at the PTAB: Shifts in Parallel Proceedings Strategy Trending at the PTAB: Shifts in Parallel Proceedings Strategy

June 30, 2025

Law360

Articles

Progress Preempted: A Call to Restore the Cornerstone of § 101

Progress Preempted: A Call to Restore the Cornerstone of § 101 Progress Preempted: A Call to Restore the Cornerstone of § 101

March 14, 2025

Westlaw Today

Articles

Trending at the PTAB: Obviousness in Director Reviews

Trending at the PTAB: Obviousness in Director Reviews Trending at the PTAB: Obviousness in Director Reviews

September 6, 2024

Law360
More

Professional Activities

  • American Intellectual Property Law Association (AIPLA)
    (member, 2023-present)
Admissions and Education

Admissions

  • U.S. Patent and Trademark Office
  • District of Columbia

Education

Georgetown University Law Center
J.D., 2024
University of Maryland
M.S., Materials Science, 2018
University of Massachusetts, Amherst
B.S., Chemical Engineering, 2012

Leith's Practices

Appeals, Issues, and Legal Strategy
Appeals to the PTAB
Patent Office Invalidation Proceedings
PTAB Invalidation Proceedings: IPR and PGR
Prosecution and Portfolio Management
Patent Drafting and Prosecution

Leith's Industries

AI, Electronics, and Information Technology
Electrical and Computer Technology
Electronic Devices and Components
Nanotechnology
Chemicals, Industrials, and Materials
Chemical
Energy
Clean Energy and Renewables
Oil and Gas

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