Granted Patent
Utility
US 6,429,334 · App. 09/588,883
Production of acid anhydrides and acid chlorides
Inventor:
Gordon L. Thayer, Jr.
Patented Case
View Patent ↗
Granted: Aug 6, 2002
Filed: Jun 7, 2000
Inventor
Gordon L. Thayer, Jr.
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.