Granted Patent
Utility
US 4,639,482 · App. 06/477,183
Phosphoric acid compounds as co-stabilizers for Me(II)-carboxylates and/or Me(II)-phenolates in PVC
Inventors:
Horst Muller, Horst Zinke, Wolfgang Wehner
Patented Case
View Patent ↗
Granted: Jan 27, 1987
Filed: Mar 21, 1983
Inventors
Horst Muller
Horst Zinke
Wolfgang Wehner
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.