Payton T. Thornton

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Payton Thornton focuses his practice on all aspects of antitrust, competition, and consumer protection matters. He regularly advises clients regarding antitrust compliance, healthcare mergers and acquisitions, Hart-Scott-Rodino (HSR) premerger notifications and merger review, and government investigations by the antitrust agencies and state attorneys general. With extensive experience advising clients through the HSR notification process, managing document production for federal and state antitrust conduct and consumer protection investigations, and preparing advocacy materials for government merger reviews, Payton provides strategic, business-centric advice to clients, primarily in the healthcare and technology industries. He offers key guidance to clients engaging in strategic transactions throughout the HSR filing and review process, Second Requests, and merger litigation. Read Payton Thornton's full bio.

Coiled in controversy: Summary judgment on Walker Process claim unwound


By on Mar 12, 2026
Posted In Patents

The US Court of Appeals for the Federal Circuit vacated a district court’s grant of summary judgment on inequitable conduct and a Walker Process antitrust claim arising from allegations that a patent owner withheld material prior art during patent prosecution and sought to enforce the patents against a competitor in the coiled tubing market. Global...

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