Granted Patent
Utility
US 5,489,618 · App. 08/158,507
Process for preparing polyurethane foam
Inventor:
Richard M. Gerkin
Patented Case
View Patent ↗
Granted: Feb 6, 1996
Filed: Nov 29, 1993
Inventor
Richard M. Gerkin
Assignee (at issue)
OSI Specialties, Inc.
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.