Granted Patent
Utility
US 4,182,827 · App. 05/938,702
Polyurethane hydrogels having enhanced wetting rates
Inventors:
Allen P. Jones, Robert J. Knopf
Patented Case
View Patent ↗
Granted: Jan 8, 1980
Filed: Aug 31, 1978
Inventors
Allen P. Jones
Robert J. Knopf
Assignee (at issue)
Union Carbide 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.