Granted Patent
Utility
US 4,554,328 · App. 06/696,570
Modified PET polymers and copolymers suitable for extrusion blow molding
Inventors:
Stephen M. Sinker, Joseph J. Baron, Jr., Raymond W. Rupp, Marvin L. Doerr, Charles E. McChesney
Patented Case
View Patent ↗
Granted: Nov 19, 1985
Filed: Jan 30, 1985
Inventors
Stephen M. Sinker
Joseph J. Baron, Jr.
Raymond W. Rupp
Marvin L. Doerr
Charles E. McChesney
Assignee (at issue)
Celanese GmbH
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.