Granted Patent
Utility
US 4,235,975 · App. 06/061,563
Bis(dimethylbenzyl)diphenylamine scorch inhibitor for polyurethane foams containing halogenated phosphate esters
Inventors:
Frank J. Preston, Steven T. Nakos, Louis Rua, Jr.
Patented Case
View Patent ↗
Granted: Nov 25, 1980
Filed: Jul 27, 1979
Inventors
Frank J. Preston
Steven T. Nakos
Louis Rua, Jr.
Assignee (at issue)
Olin Corporation
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.