Granted Patent
Utility
US 5,124,289 · App. 07/265,179
Surface treated permeable inorganic membranes and process of making same
Inventors:
Edward S. Martin, Larry F. Wieserman, Karl Wefers, Kathryn Cross
Patented Case
View Patent ↗
Granted: Jun 23, 1992
Filed: Oct 31, 1988
Inventors
Edward S. Martin
Larry F. Wieserman
Karl Wefers
Kathryn Cross
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.