Granted Patent
Utility
US 6,617,140 · App. 09/833,555
Process for producing trans-4-hydroxy-L-proline
Inventors:
Akio Ozaki, Hideo Mori, Takeshi Shibasaki, Katsuhiko Ando, Shigeru Chiba
Patented Case
View Patent ↗
Granted: Sep 9, 2003
Filed: Apr 13, 2001
Inventors
Akio Ozaki
Hideo Mori
Takeshi Shibasaki
Katsuhiko Ando
Shigeru Chiba
Assignee (at issue)
KYOWA HAKKO KOGYO 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.