Granted Patent
Utility
US 5,525,640 · App. 08/527,801
Silicone surfactants for use in inert gas blown polyurethane foams
Inventors:
Richard M. Gerkin, Mark E. Harakal, Lee F. Lawler, Glenn A. Miller
Patented Case
View Patent ↗
Granted: Jun 11, 1996
Filed: Sep 13, 1995
Inventors
Richard M. Gerkin
Mark E. Harakal
Lee F. Lawler
Glenn A. Miller
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.