Granted Patent
Utility
US 5,198,474 · App. 07/906,505
Silicone surfactants having t-butyl terminated polyether pendants for use in high resilience polyurethane foam
Inventor:
John A. Kilgour
Patented Case
View Patent ↗
Granted: Mar 30, 1993
Filed: Jun 30, 1992
Inventor
John A. Kilgour
Assignee (at issue)
Union Carbide Chemicals & Plastics Technology LLC
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.