Granted Patent
Utility
US 4,477,654 · App. 06/393,407
3-Hydroxybutyrate polymers
Inventors:
Paul A. Holmes, Stephen H. Collins, Leonard F. Wright
Patented Case
View Patent ↗
Granted: Oct 16, 1984
Filed: Jun 29, 1982
Inventors
Paul A. Holmes
Stephen H. Collins
Leonard F. Wright
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
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.