Granted Patent
Utility
US 4,238,575 · App. 06/011,275
Stabilized compositions containing polymeric thiosynergists
Inventors:
Eduard K. Kleiner, Martin Dexter
Patented Case
View Patent ↗
Granted: Dec 9, 1980
Filed: Feb 12, 1979
Inventors
Eduard K. Kleiner
Martin Dexter
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.