Granted Patent
Utility
US 4,911,985 · App. 07/313,320
High density polyethylene compositions containing polyisobutylene rubber and filler
Inventors:
Edwin A. Jenkins, Jay P. Porter, William D. Ray
Patented Case
View Patent ↗
Granted: Mar 27, 1990
Filed: Feb 21, 1989
Inventors
Edwin A. Jenkins
Jay P. Porter
William D. Ray
Assignee (at issue)
AlliedSignal, Inc.
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.