Granted Patent
Utility
US 4,705,770 · App. 06/882,874
Method of making anatase-titania attrition-resistant catalyst composition
Inventors:
Leonard A. Cullo, Elliott V. Nagle, Jr., Edward F. Restelli, Jr., Thomas J. Yogan
Patented Case
View Patent ↗
Granted: Nov 10, 1987
Filed: Jul 7, 1986
Inventors
Leonard A. Cullo
Elliott V. Nagle, Jr.
Edward F. Restelli, Jr.
Thomas J. Yogan
Assignee (at issue)
Aristech Chemical Company
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.