Granted Patent
Utility
US 5,958,993 · App. 08/793,439
Fog reduction in polyurethane foam using phosphate esters
Inventors:
Cefn Blundell, Johan Antonie Wuestenenk
Patented Case
View Patent ↗
Granted: Sep 28, 1999
Filed: Apr 18, 1997
Inventors
Cefn Blundell
Johan Antonie Wuestenenk
Assignee (at issue)
Akzo Novel NV
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.