Granted Patent
Utility
US 4,226,911 · App. 06/015,098
Microporous elastomeric material and method of manufacture
Inventor:
Doyle V. Haren
Patented Case
View Patent ↗
Granted: Oct 7, 1980
Filed: Feb 26, 1979
Inventor
Doyle V. Haren
Assignee (at issue)
DayCo Holdings, LP
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.