Granted Patent
Utility
US 5,973,016 · App. 09/081,558
Resilient polyurethane foams of polydiene diols and oil
Inventors:
David J. St. Clair, Hector Hernandez
Patented Case
View Patent ↗
Granted: Oct 26, 1999
Filed: May 19, 1998
Inventors
David J. St. Clair
Hector Hernandez
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.