Granted Patent
Utility
US 4,399,058 · App. 06/241,018
Impregnating solution for hydrogenation catalyst manufacture and production thereof
Inventors:
John J. Stanulonis, Joseph A. Tabacek, Roger F. Vogel
Patented Case
View Patent ↗
Granted: Aug 16, 1983
Filed: Mar 6, 1981
Inventors
John J. Stanulonis
Joseph A. Tabacek
Roger F. Vogel
Assignee (at issue)
Gulf Research & Development 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.