Granted Patent
Utility
US 5,998,540 · App. 09/177,001
Polyurethane dispersions useful for preparing thin wall articles
Inventors:
Anatoly Lipkin, Ibrahim S. Bechara
Patented Case
View Patent ↗
Granted: Dec 7, 1999
Filed: Oct 22, 1998
Inventors
Anatoly Lipkin
Ibrahim S. Bechara
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.