Granted Patent
Utility
US 4,359,561 · App. 06/246,914
High tear strength polymers
Inventors:
William A. Fraser, Norma J. Maraschin, Frederick J. Karol, Alexander J. Makai
Patented Case
View Patent ↗
Granted: Nov 16, 1982
Filed: Mar 23, 1981
Inventors
William A. Fraser
Norma J. Maraschin
Frederick J. Karol
Alexander J. Makai
Assignee (at issue)
Union Carbide Corporation
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.