Catherine Winter is an experienced attorney focusing on patent preparation and prosecution. She regularly advises clients on patentability and patent strategy from filings to office action responses, appeals and oppositions.

As former in-house counsel at a multinational company focused on technology and innovation, Catherine’s experience working closely with executives and inventors lends well to her ability to anticipate clients’ needs.

She has experience with a wide array of technologies, including polymer chemistry, coatings, silicones, materials, phosphors, membrane technology, water treatment, recycling, battery technology, gasification systems, crude oil and refinery processing, desalination, biotech (protein purification, enzymes, nucleic acid capture, binding, cellular therapy, controlling microbial and bacterial pathogens and biocidal delivery) and lighting devices. She also has extensive experience filing and prosecuting applications on a global scale, including in Europe, Asia, Canada, Mexico, Indonesia, South America and Australia.

Further, Catherine is skilled at managing IP portfolios through complex acquisitions and working to integrate large international dockets.

*Catherine Winter is an independent contractor with Armstrong Teasdale.

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Catherine spent more than 20 years in-house as senior patent counsel for a multinational innovation company. Before that, she was in private practice at law firms in New York and Missouri, where she prosecuted global patent and trademark applications and provided litigation support.  


  • Washington University School of Law  (J.D., 1991)
  • Indiana University  (B.S., 1985)
    • Chemistry


  • Missouri
  • Connecticut
  • U.S. Patent and Trademark Office

Charitable and Civic Involvement

  • Music Parents Association of Fairfield (CT) High Schools, Volunteer and Past President
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