Granted Patent
Utility
US 5,041,647 · App. 06/930,056
Process for producing trifluoroacetic acid and trifluoroacetyl chloride
Inventors:
Isao Gotoh, Hajime Yoneda, Seisaku Kumai, Tohru Ueno
Patented Case
View Patent ↗
Granted: Aug 20, 1991
Filed: Nov 12, 1986
Inventors
Isao Gotoh
Hajime Yoneda
Seisaku Kumai
Tohru Ueno
Assignee (at issue)
ASAHI GLASS CO., LTD.
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.