Granted Patent
Utility
US 4,124,572 · App. 05/813,070
Thermoplastic polyurethane elastomer
Inventor:
Chung-Ling Mao
Patented Case
View Patent ↗
Granted: Nov 7, 1978
Filed: Jul 5, 1977
Inventor
Chung-Ling Mao
Assignee (at issue)
Uniroyal Ltd.
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.