Granted Patent
Utility
US 4,500,655 · App. 06/566,756
Alkoxylated modified Mannich condensates and manufacture of rigid polyurethane foams therewith
Inventor:
Michael E. Brennan
Patented Case
View Patent ↗
Granted: Feb 19, 1985
Filed: Dec 29, 1983
Inventor
Michael E. Brennan
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.