Granted Patent
Utility
US 5,264,639 · App. 07/885,250
Process for producing a 2,2-difluoropropane
Inventors:
Shinsuke Morikawa, Shunichi Samejima, Hidekazu Okamoto, Keiichi Ohnishi, Shin Tatematsu, Toshihiro Tanuma, Takashi Ohmori
Patented Case
View Patent ↗
Granted: Nov 23, 1993
Filed: May 20, 1992
Inventors
Shinsuke Morikawa
Shunichi Samejima
Hidekazu Okamoto
Keiichi Ohnishi
Shin Tatematsu
Toshihiro Tanuma
Takashi Ohmori
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.