Granted Patent
Utility
US 6,660,781 · App. 09/225,550
Process for preparing polyurethane foam
Inventors:
Hassan El Ghobary, Louis Muller
Patented Case
View Patent ↗
Granted: Dec 9, 2003
Filed: Jan 5, 1999
Inventors
Hassan El Ghobary
Louis Muller
Assignee (at issue)
Witco 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.