Granted Patent
Utility
US 4,491,571 · App. 06/501,119
Process for producing hydrogen fluoride
Inventors:
Kaichiro Suzuki, Keiichi Nakaya, Tomohiro Gotoh, Masayuki Kitasako, Masaharu Iwasaki
Patented Case
View Patent ↗
Granted: Jan 1, 1985
Filed: Jun 6, 1983
Inventors
Kaichiro Suzuki
Keiichi Nakaya
Tomohiro Gotoh
Masayuki Kitasako
Masaharu Iwasaki
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.