Granted Patent
Utility
US 3,947,501 · App. 05/458,278
Process for treatment of reaction mixtures by hydrogenation
Inventor:
John Kollar
Patented Case
View Patent ↗
Granted: Mar 30, 1976
Filed: Apr 5, 1974
Inventor
John Kollar
Assignee (at issue)
Halcon International, Inc.
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.