Granted Patent
Utility
US 4,010,116 · App. 05/514,567
Fluid cracking catalysts
Inventors:
Robert B. Secor, Robert A. Van Nordstrand, David R. Pegg
Patented Case
View Patent ↗
Granted: Mar 1, 1977
Filed: Oct 15, 1974
Inventors
Robert B. Secor
Robert A. Van Nordstrand
David R. Pegg
Assignee (at issue)
Filtrol Corporation
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.