Granted Patent
Utility
US 4,151,136 · App. 05/887,102
Acid reactable inorganic mineral fillers having improved compatibility with polyolefin resins
Inventor:
Stephen W. Cornell
Patented Case
View Patent ↗
Granted: Apr 24, 1979
Filed: Mar 16, 1978
Inventor
Stephen W. Cornell
Assignee (at issue)
Continental AG
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.