Granted Patent
Utility
US 4,520,042 · App. 06/575,677
High-modulus, flexible urethane coating and method of preparation
Inventor:
Stuart B. Smith
Patented Case
View Patent ↗
Granted: May 28, 1985
Filed: Jan 31, 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.