Granted Patent
Utility
US 4,477,492 · App. 06/487,894
Process for preparing superficially porous supports for chromatography and catalysts
Inventors:
Horacio E. Bergna, Joseph J. Kirkland
Patented Case
View Patent ↗
Granted: Oct 16, 1984
Filed: Apr 22, 1983
Inventors
Horacio E. Bergna
Joseph J. Kirkland
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
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.