Granted Patent
Utility
US 4,554,329 · App. 06/696,606
Modified PET polymers and copolymers suitable for extrusion blow molding
Inventors:
Stephen M. Sinker, Charles E. McChesney
Patented Case
View Patent ↗
Granted: Nov 19, 1985
Filed: Jan 30, 1985
Inventors
Stephen M. Sinker
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.