Granted Patent
Utility
US 4,753,967 · App. 07/086,335
Polyester polyols modified by polyols having 1 degree and 2 degree OH groups and cellular foams therefrom
Inventor:
Michael E. Londrigan
Patented Case
View Patent ↗
Granted: Jun 28, 1988
Filed: Aug 17, 1987
Inventor
Michael E. Londrigan
Assignee (at issue)
Sloss Industries Corporation
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.