Granted Patent
Utility
US 6,423,756 · App. 09/709,966
Process to improve polyurethane foam performance
Inventors:
Hassan El Ghobary, Louis Muller
Patented Case
View Patent ↗
Granted: Jul 23, 2002
Filed: Nov 10, 2000
Inventors
Hassan El Ghobary
Louis Muller
Assignee (at issue)
Crompton 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.