Granted Patent
Utility
US 4,086,207 · App. 05/699,161
Polyurea compounds which improve the light stability of polymers
Inventors:
Paolo Cassandrini, Antonio Tozzi
Patented Case
View Patent ↗
Granted: Apr 25, 1978
Filed: Jun 23, 1976
Inventors
Paolo Cassandrini
Antonio Tozzi
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.