Granted Patent
Utility
US 4,489,178 · App. 06/545,422
Mannich condensates having fire retardancy properties and manufacture of rigid polyurethane foam therewith
Inventors:
Michael E. Brennan, George P. Speranza
Patented Case
View Patent ↗
Granted: Dec 18, 1984
Filed: Oct 25, 1983
Inventors
Michael E. Brennan
George P. Speranza
Assignee (at issue)
Texaco Inc.
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.