Granted Patent
Utility
US 5,254,729 · App. 07/705,363
Method for purifying glycine
Inventors:
Kenji Fujiwara, Susumu Yoshinaga, Yuji Matsuu, Hiroshi Kato, Atsuhiko Hiai
Patented Case
View Patent ↗
Granted: Oct 19, 1993
Filed: May 24, 1991
Inventors
Kenji Fujiwara
Susumu Yoshinaga
Yuji Matsuu
Hiroshi Kato
Atsuhiko Hiai
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.