Granted Patent
Utility
US 5,821,327 · App. 08/819,631
Process for preparing polylactic acid
Inventors:
Masaaki Oota, Masahiro Ito
Patented Case
View Patent ↗
Granted: Oct 13, 1998
Filed: Mar 17, 1997
Inventors
Masaaki Oota
Masahiro Ito
Assignee (at issue)
SHIMADZU CORPORATION
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.