Granted Patent
Utility
US 4,749,672 · App. 06/802,542
Catalysts and catalyst supports
Inventors:
Roger J. Lussier, George J. Surland
Patented Case
View Patent ↗
Granted: Jun 7, 1988
Filed: Nov 27, 1985
Inventors
Roger J. Lussier
George J. Surland
Assignee (at issue)
W. R. Grace & Co.
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.