Granted Patent
Utility
US 4,434,264 · App. 06/477,703
High clarity propylene polymer compositions of improved impact strength
Inventor:
Harold K. Ficker
Patented Case
View Patent ↗
Granted: Feb 28, 1984
Filed: Mar 22, 1983
Inventor
Harold K. Ficker
Assignee (at issue)
El Paso Polyolefins 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.