Granted Patent
Utility
US 5,723,536 · App. 08/832,551
Aqueous or water-dilutable blocked polyisocyanates and their use for preparing polyurethane clearcoats having substantially reduced thermal yellowing
Inventors:
Beate Baumbach, Eberhard Konig, Lothar Kahl, Nusret Yuva
Patented Case
View Patent ↗
Granted: Mar 3, 1998
Filed: Apr 3, 1997
Inventors
Beate Baumbach
Eberhard Konig
Lothar Kahl
Nusret Yuva
Assignee (at issue)
Bayer Aktiengesellschaft
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.