Granted Patent
Utility
US 4,962,073 · App. 07/265,243
Surface treated porous ceramic membranes and method of making same
Inventors:
Edward S. Martin, Larry F. Wieserman
Patented Case
View Patent ↗
Granted: Oct 9, 1990
Filed: Oct 31, 1988
Inventors
Edward S. Martin
Larry F. Wieserman
Assignee (at issue)
Aluminum Company of America
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.