Granted Patent
Utility
US 4,279,780 · App. 06/141,570
Method of preparing catalyst supports
Inventor:
Robert A. Dombro
Patented Case
View Patent ↗
Granted: Jul 21, 1981
Filed: Apr 18, 1980
Inventor
Robert A. Dombro
Assignee (at issue)
Chemplex, Ltd.
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.