Granted Patent
Utility
US 5,334,739 · App. 07/983,180
"Process an alpha monoclinic crystalline modification of 2,2',2""-nitrilo[triethyl-tris-(3,3',5,5'-tetra-tert-butyl-1,1'-biphenyl- 2,2'-diyl)phosphite]"
Inventors:
Stephen D. Pastor, Sai P. Shum, Paul A. Odorisio
Patented Case
View Patent ↗
Granted: Aug 2, 1994
Filed: Nov 30, 1992
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.