Granted Patent
Utility
US 4,665,048 · App. 06/806,459
Catalyst suitable for hydrotreating
Inventors:
Willem A. Van Leeuwen, Eduard K. Poels, Leendert H. Staal, Dirk Verzijl
Patented Case
View Patent ↗
Granted: May 12, 1987
Filed: Dec 9, 1985
Inventors
Willem A. Van Leeuwen
Eduard K. Poels
Leendert H. Staal
Dirk Verzijl
Assignee (at issue)
Internationale Otrool Maatschappij Octropa B.V.
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.