Granted Patent
Utility
US 5,310,865 · App. 07/992,696
Polyhydroxycarboxylic acid and preparation process thereof
Inventors:
Katashi Enomoto, Masanobu Ajioka, Akihiro Yamaguchi
Patented Case
View Patent ↗
Granted: May 10, 1994
Filed: Dec 18, 1992
Inventors
Katashi Enomoto
Masanobu Ajioka
Akihiro Yamaguchi
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.