Celanese v. ITC: Can a Secret Manufacturing Process Be Patented After Sale of the Resulting Product?

by Dennis Crouch

The Federal Circuit held oral arguments on March 4, 2024 in the important patent case of Celanese Int'l. v ITC, 22-1827 (Fed. Cir. 2024).

The question: Under the AIA, does sale of a product by the patent applicant prohibit the patentee from later patenting the process used to make the product? 

Background


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