Granted Patent
Utility
US 4,325,845 · App. 06/092,722
Zeolite catalysts and method of producing the same
Inventors:
John Lim, Michael Brady
Patented Case
View Patent ↗
Granted: Apr 20, 1982
Filed: Nov 9, 1979
Inventors
John Lim
Michael Brady
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.