Granted Patent
Utility
US 5,030,671 · App. 07/421,575
Mercaptobenzoates as stabilizers for chlorine-containing polymers
Inventors:
Wolfgang Wehner, Gerd Abeler
Patented Case
View Patent ↗
Granted: Jul 9, 1991
Filed: Oct 16, 1989
Inventors
Wolfgang Wehner
Gerd Abeler
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.