Jeffrey A. Chelstrom
“A valuable patent requires more than merely summarizing a client’s invention. It means asking the right questions, understanding what makes the invention unique, then crafting a compelling story to present to the USPTO.”

Jeffrey A. ChelstromPartner

120 South LaSalle Street
Suite 1600
Chicago, IL 60603VCard
312.577.7007 fax
LinkedInDownload PDF


J.D., William Mitchell College of Law, 2003, magna cum laude
B.S., Chemical Engineering, Iowa State University, 1991, with honors


Technical Areas

Bar & Court Admissions

IllinoisU.S. Patent and Trademark OfficeU.S. District Court for the Northern District of Illinois

Jeffrey A. Chelstrom focuses his intellectual property law practice on the preparation and prosecution of patent applications in the chemical and mechanical arts, as well as litigation support. He regularly counsels clients on product clearance and freedom-to-operate issues as well as the management of their patent portfolios, helping them to meet their business objectives.

Jeff advises clients in companies of all sizes working with technologies relating to food processing, chemistry, adhesives, laminates, petroleum, automotive components, irrigation systems, and lighting systems, among others.

When prosecuting patent applications, Jeff understands the advantages of Patent Examiner interviews, declaration practice, and appeals before the USPTO Patent Trial and Appeal Board. He recognizes the benefits of using these tools to move a patent application through the patent office in a cost-effective manner.

Prior to attending law school, Jeff worked for over nine years as a chemical engineer with 3M company, where he gained substantial industrial experience with adhesives, polymers, films, coating technologies, and abrasives. While at 3M, he worked in manufacturing, research and development, and process development. Jeff’s many years of engineering experience provides him with a deeper comprehension of his clients’ intellectual property issues and challenges.

Represents and advises an international container seal company in patent and enforcement matters. Obtained several patents to help expand their patent portfolio covering key product technologies.

Manages a global patent portfolio relating to novel adhesive formulations and films suitable for packaging applications.

Advised a global irrigation company through a complex patent clearance. Several product configurations were analyzed and reviewed relative to granted patents and pending applications.

Successfully prosecuted a patent for a Fortune 500 food company relating to beverage concentrates.

Has written over 30 appeal briefs to the USPTO Board of Patent Appeals and Interferences for a broad range of clients in the chemical and mechanical arts.

  • "Prosecuting the Unexpected Ratio: Advanced Lessons in Patent Prosecution and Claim Drafting," Fitch, Even, Tabin & Flannery Webinar, April 28, 2016.
  • "America Invents Act First-to-File Changes: What Happens Now?" Fitch, Even, Tabin & Flannery Webinar, February 27, 2013.
  • "The Leahy-Smith America Invents Act: A Further Look into ‘First-to-File,’" Chicago Bar Association, January 24, 2012.
  • "The Leahy-Smith America Invents Act: A Further Look into ‘First-to-File,’" Fitch, Even, Tabin & Flannery Webinar, November 17, 2011.
  • William Mitchell College of Law, Intellectual Property Institute
    • Member, Board of Advisors
  • Intellectual Property Law Association of Chicago
    • U.S. Patents Committee, Chair, 2014–15

Hosted on the FirmWisesm Platform | Designed by Charette Design