Granted Patent
Utility
US 5,241,111 · App. 07/614,598
Processes for producing 5-fluorobenzoic acids and their intermediates
Inventors:
Seisaku Kumai, Masao Ohashi, Yutaka Yaginuma, Katsuhiko Takeda
Patented Case
View Patent ↗
Granted: Aug 31, 1993
Filed: Nov 15, 1990
Inventors
Seisaku Kumai
Masao Ohashi
Yutaka Yaginuma
Katsuhiko Takeda
Assignees (at issue)
ASAHI GLASS CO., LTD.
Seimi Chemical 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.