Granted Patent
Utility
US 5,449,779 · App. 08/241,934
Process for preparing N,N'-bis(hydrocarbyloxycarbonyl)-N,N'-bis(2,2,6,6-tetramethyl-4-piperidy l)diamines
Inventors:
Primo Carrozza, Giovanni Da Roit, Valerio Borzatta
Patented Case
View Patent ↗
Granted: Sep 12, 1995
Filed: May 11, 1994
Inventors
Primo Carrozza
Giovanni Da Roit
Valerio Borzatta
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.