Granted Patent
Utility
US 4,390,641 · App. 06/336,681
Flame-retardant benzylic-ether phenolic modified foam and method of preparing same
Inventor:
Stuart B. Smith
Patented Case
View Patent ↗
Granted: Jun 28, 1983
Filed: Jan 4, 1982
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.