Granted Patent
Utility
US 5,081,294 · App. 07/327,354
Cationic reaction products of basic carbamides and epithalohydrins
Inventors:
Rosemarie Topfl, Jorg Binz
Patented Case
View Patent ↗
Granted: Jan 14, 1992
Filed: Mar 21, 1989
Inventors
Rosemarie Topfl
Jorg Binz
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.