Granted Patent
Utility
US 4,452,911 · App. 06/521,861
Frangible catalyst pretreatment method for use in hydrocarbon hydrodemetallization process
Inventors:
Richard M. Eccles, Allen Li, Shyy-Jong D. Lin, Virginia A. Malik, Michael C. Chervenak
Patented Case
View Patent ↗
Granted: Jun 5, 1984
Filed: Aug 10, 1983
Inventors
Richard M. Eccles
Allen Li
Shyy-Jong D. Lin
Virginia A. Malik
Michael C. Chervenak
Assignee (at issue)
HRI
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.