Granted Patent
Utility
US 5,393,871 · App. 08/000,316
Production of polyesters and polyester articles having good clarity
Inventors:
Cheuk C. Yau, Clinton Cherry
Patented Case
View Patent ↗
Granted: Feb 28, 1995
Filed: Jan 4, 1993
Inventors
Cheuk C. Yau
Clinton Cherry
Assignee (at issue)
Eastman 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.