Granted Patent
Utility
US 4,801,625 · App. 07/090,319
Bicyclic phosphate ether, ester, and carbonate intumescent flame retardant compositions
Inventors:
William J. Parr, Arthur G. Mack, Paul Y. Moy
Patented Case
View Patent ↗
Granted: Jan 31, 1989
Filed: Aug 27, 1987
Inventors
William J. Parr
Arthur G. Mack
Paul Y. Moy
Assignee (at issue)
Akzo America 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.