Granted Patent
Utility
US 5,196,465 · App. 07/830,013
Polymeric thermoplastic materials, comprising 1,2,4-triazolidine-3,5-dione derivatives as stabilizers
Inventors:
Roberto Scrima, Graziano Zagnoni, Valerio Borzatta
Patented Case
View Patent ↗
Granted: Mar 23, 1993
Filed: Feb 3, 1992
Inventors
Roberto Scrima
Graziano Zagnoni
Valerio Borzatta
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.