Granted Patent
Utility
US 5,922,110 · App. 09/010,526
Water-soluble, biodegradable filter, and process of using same
Inventors:
Harvey Weaver, Donald Mark Cyron
Patented Case
View Patent ↗
Granted: Jul 13, 1999
Filed: Jan 21, 1998
Inventors
Harvey Weaver
Donald Mark Cyron
Assignee (at issue)
DCV, Inc.
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.