Granted Patent
Utility
US 5,312,741 · App. 07/895,289
Process for producing 2-keto-L-gulonic acid
Inventors:
Tatsuo Hoshino, Setuko Ojima, Teruhide Sugisawa
Patented Case
View Patent ↗
Granted: May 17, 1994
Filed: Jun 8, 1992
Inventors
Tatsuo Hoshino
Setuko Ojima
Teruhide Sugisawa
Assignee (at issue)
HOFFMANN-LA ROCHE INC.
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.