Granted Patent
Utility
US 5,250,333 · App. 07/965,634
Modified polyethylene terephthalate
Inventors:
Gerald W. McNeely, Aylmer J. Woodward
Patented Case
View Patent ↗
Granted: Oct 5, 1993
Filed: Oct 26, 1992
Inventors
Gerald W. McNeely
Aylmer J. Woodward
Assignee (at issue)
Hoechst Celanese 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.