Granted Patent
Utility
US 5,250,428 · App. 07/761,140
L-gulono-gamma-lactone-dehydrogenase for producing vitamin C
Inventors:
Tatsuo Hoshino, Peter Karl Matzinger, Setsuko Ojima, Teruhide Sugisawa
Patented Case
View Patent ↗
Granted: Oct 5, 1993
Filed: Sep 17, 1991
Inventors
Tatsuo Hoshino
Peter Karl Matzinger
Setsuko 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.