Granted Patent
Utility
US 4,331,577 · App. 06/210,732
Latex polymerization process
Inventor:
Russell Hanna
Patented Case
View Patent ↗
Granted: May 25, 1982
Filed: Nov 26, 1980
Inventor
Russell Hanna
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.