Granted Patent
Utility
US 4,644,030 · App. 06/697,523
Aqueous polyurethane - polyolefin compositions
Inventors:
Peter Loewrigkeit, Kenneth A. Van Dyk
Patented Case
View Patent ↗
Granted: Feb 17, 1987
Filed: Feb 1, 1985
Inventors
Peter Loewrigkeit
Kenneth A. Van Dyk
Assignee (at issue)
Witco 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.