Granted Patent
Utility
US 5,026,745 · App. 07/364,280
Biodeteriable plastics and blends
Inventor:
Richard C. Weil
Patented Case
View Patent ↗
Granted: Jun 25, 1991
Filed: Jun 12, 1989
Inventor
Richard C. Weil
Assignee (at issue)
Aristech Chemical Company
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.