Granted Patent
Utility
US 5,512,621 · App. 08/152,106
"Alpha crystalline modification of 2,2',2""-nitrilo triethyl-tris-(3,3',5,5'-t'-biphenyl-2,2'-diyl) phosphite!"
Inventors:
Stephen D. Pastor, Sai P. Shum, Paul A. Odorisio
Patented Case
View Patent ↗
Granted: Apr 30, 1996
Filed: Nov 12, 1993
Inventors
Stephen D. Pastor
Sai P. Shum
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.