Granted Patent
Utility
US 4,423,198 · App. 06/422,881
High green strength synthetic rubbers and method
Inventor:
Tom C. Tsai
Patented Case
View Patent ↗
Granted: Dec 27, 1983
Filed: Sep 24, 1982
Inventor
Tom C. Tsai
Assignee (at issue)
Copolymer Rubber & Chemical 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.