Granted Patent
Utility
US 4,892,585 · App. 07/248,698
Process for producing articles made from polyurethane foam and additive for performing this process
Inventors:
Wolfgang Fischer, Thomas Hattich, William P. Krug, Gerhard Schuster
Patented Case
View Patent ↗
Granted: Jan 9, 1990
Filed: Oct 17, 1988
Inventors
Wolfgang Fischer
Thomas Hattich
William P. Krug
Gerhard Schuster
Assignee (at issue)
Grace Service Chemicals GmbH
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.