Granted Patent
Utility
US 5,071,982 · App. 07/558,297
Process for producing a 4,6-bis(difluoromethoxy)-2-alkylthiopyrimidine
Inventors:
Sumio Yoshino, Kazuyuki Watanabe, Mikio Akazawa
Patented Case
View Patent ↗
Granted: Dec 10, 1991
Filed: Jul 26, 1990
Inventors
Sumio Yoshino
Kazuyuki Watanabe
Mikio Akazawa
Assignees (at issue)
ASAHI GLASS CO., LTD.
Ciba-Geigy
KAWAGUCHI CHEMICAL INDUSTRY 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.