Granted Patent
Utility
US 5,194,510 · App. 07/525,812
Thermoplastic elastomers
Inventors:
Donn A. DuBois, Carl L. Willis
Patented Case
View Patent ↗
Granted: Mar 16, 1993
Filed: May 21, 1990
Inventors
Donn A. DuBois
Carl L. Willis
Assignee (at issue)
SHELL OIL COMPANY
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.