Granted Patent
Utility
US 6,140,401 · App. 08/776,479
Use of a stabilizer combination in the production of films of polyvinyl chloride by the calendering process
Inventors:
Peter Wedl, Ernst-Udo Brand, Arthur J. Peters, Joerg-Dieter Klamann
Patented Case
View Patent ↗
Granted: Oct 31, 2000
Filed: Feb 27, 1997
Inventors
Peter Wedl
Ernst-Udo Brand
Arthur J. Peters
Joerg-Dieter Klamann
Assignee (at issue)
Henkel Kommanditgesellschaft auf Aktien
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.