Granted Patent
Utility
US 5,439,958 · App. 08/278,593
Polyalkyl-4-piperidinol derivatives for use as stabilizers for organic materials
Inventors:
Roberto Scrima, Graziano Zagnoni, Michael Ackerman, James P. Galbo, Roland A. E. Winter
Patented Case
View Patent ↗
Granted: Aug 8, 1995
Filed: Jul 21, 1994
Inventors
Roberto Scrima
Graziano Zagnoni
Michael Ackerman
James P. Galbo
Roland A. E. Winter
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.