Granted Patent
Utility
US 4,490,483 · App. 06/495,966
Process for preparing catalysts
Inventors:
Roger F. Vogel, Raymond J. Rennard, Joseph A. Tabacek
Patented Case
View Patent ↗
Granted: Dec 25, 1984
Filed: May 19, 1983
Inventors
Roger F. Vogel
Raymond J. Rennard
Joseph A. Tabacek
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.