Granted Patent
Utility
US 6,136,900 · App. 09/121,471
Stabilized polyvinyl chloride
Inventors:
Karl-Josef Kuhn, Wolfgang Wehner
Patented Case
View Patent ↗
Granted: Oct 24, 2000
Filed: Jul 23, 1998
Inventors
Karl-Josef Kuhn
Wolfgang Wehner
Assignee (at issue)
Witco Vinyl Additives GmbH
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.