Granted Patent
Utility
US 5,114,585 · App. 07/462,283
Charged porous filter
Inventors:
Menahem Kraus, Diosie Velazquez, Chan Hong Wang
Patented Case
View Patent ↗
Granted: May 19, 1992
Filed: Dec 27, 1989
Inventors
Menahem Kraus
Diosie Velazquez
Chan Hong Wang
Assignee (at issue)
Gelman Sciences
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.