Granted Patent
Utility
US 4,713,475 · App. 06/873,556
Long chain (4-hydroxyphenyl) propanoate stabilizers
Inventors:
John D. Spivack, David H. Steinberg, Paul A. Odorisio
Patented Case
View Patent ↗
Granted: Dec 15, 1987
Filed: Jun 12, 1986
Inventors
John D. Spivack
David H. Steinberg
Paul A. Odorisio
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.