Granted Patent
Utility
US 4,522,940 · App. 06/283,792
Method of preparing a catalyst and catalyst prepared by the method
Inventors:
Rodney Martin Sambrook, Julian R. H. Ross
Patented Case
View Patent ↗
Granted: Jun 11, 1985
Filed: Jul 16, 1981
Inventors
Rodney Martin Sambrook
Julian R. H. Ross
Assignee (at issue)
Dyson Refractories Limited
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.