Granted Patent
Utility
US 5,240,976 · App. 07/934,092
N,N'-alkenylene amine/mercaptotolylimidazole blends as high temperature antioxidants for elastomers
Inventors:
Douglas W. Horsey, Ambelal R. Patel
Patented Case
View Patent ↗
Granted: Aug 31, 1993
Filed: Aug 21, 1992
Inventors
Douglas W. Horsey
Ambelal R. Patel
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.