Granted Patent
Utility
US 5,116,894 · App. 07/701,265
Stabilizer mixtures for elastomers
Inventor:
Gerrit Knobloch
Patented Case
View Patent ↗
Granted: May 26, 1992
Filed: May 16, 1991
Inventor
Gerrit Knobloch
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.