Granted Patent
Utility
US 5,498,740 · App. 08/026,963
Compositions comprising reaction products of phosphites, quinones and isocyanates
Inventors:
Salman Dermeik, Martina Wanner, Karl-Heinz Lemmer, Reinhold Braun
Patented Case
View Patent ↗
Granted: Mar 12, 1996
Filed: Mar 5, 1993
Inventors
Salman Dermeik
Martina Wanner
Karl-Heinz Lemmer
Reinhold Braun
Assignee (at issue)
Ciba-Geigy
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.