Granted Patent
Utility
US 4,820,752 · App. 07/063,034
Process for incorporating an additive into a polymer and product produced thereby
Inventors:
Alan R. Berens, Gary S. Huvard, Richard W. Korsmeyer
Patented Case
View Patent ↗
Granted: Apr 11, 1989
Filed: Jun 17, 1987
Inventors
Alan R. Berens
Gary S. Huvard
Richard W. Korsmeyer
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.