Granted Patent
Utility
US 6,147,134 · App. 08/963,744
Process for preparing rigid and flexible polyurethane foams
Inventor:
Berend Eling
Patented Case
View Patent ↗
Granted: Nov 14, 2000
Filed: Nov 4, 1997
Inventor
Berend Eling
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
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.