Granted Patent
Utility
US 4,487,943 · App. 06/559,986
Catalytic process for the preparation of tetrahydropyran by homologation of tetrahydrofuran
Inventor:
William A. Beavers
Patented Case
View Patent ↗
Granted: Dec 11, 1984
Filed: Dec 9, 1983
Inventor
William A. Beavers
Assignees (at issue)
EASTMAN KODAK COMPANY
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.