Granted Patent
Utility
US 4,470,859 · App. 06/472,937
Coated porous substrate formation by solution coating
Inventors:
Leo L. Benezra, Michael J. Covitch, Mark Smith
Patented Case
View Patent ↗
Granted: Sep 11, 1984
Filed: Mar 7, 1983
Inventors
Leo L. Benezra
Michael J. Covitch
Mark Smith
Assignee (at issue)
Diamond Shamrock Chemicals 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.