Granted Patent
Utility
US 4,369,321 · App. 06/215,925
Piperidine derivatives which are stabilizers for synthetic polymers
Inventor:
Giuseppe Cantatore
Patented Case
View Patent ↗
Granted: Jan 18, 1983
Filed: Dec 12, 1980
Inventor
Giuseppe Cantatore
Assignee (at issue)
Chimosa Chimica Organica S.p.A.
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.