Granted Patent
Utility
US 4,921,962 · App. 07/259,949
Process for preparing N-hydrocarbyloxy derivatives of sterically hindered amines
Inventors:
James P. Galbo, Michael Ackerman
Patented Case
View Patent ↗
Granted: May 1, 1990
Filed: Oct 19, 1988
Inventors
James P. Galbo
Michael Ackerman
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.