Granted Patent
Utility
US 4,525,490 · App. 06/627,191
High tear strength flexible urethane foam composition and method of preparation
Inventor:
Stuart B. Smith
Patented Case
View Patent ↗
Granted: Jun 25, 1985
Filed: Jul 2, 1984
Inventor
Stuart B. Smith
Assignee (at issue)
Thermocell Development, 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.