Granted Patent
Utility
US 5,728,847 · App. 08/713,653
Method for recovering lactide from high-molecular weight polylactic acid
Inventors:
Hitomi Ohara, Toshio Okamoto
Patented Case
View Patent ↗
Granted: Mar 17, 1998
Filed: Sep 13, 1996
Inventors
Hitomi Ohara
Toshio Okamoto
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.