Granted Patent
Utility
US 4,307,239 · App. 06/182,900
Preparation of thiophene compounds
Inventor:
Peter Webb Raynolds
Patented Case
View Patent ↗
Granted: Dec 22, 1981
Filed: Sep 2, 1980
Inventor
Peter Webb Raynolds
Assignee (at issue)
EASTMAN KODAK 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.