Granted Patent
Utility
US 6,568,349 · App. 09/721,272
Ground grain animal litter
Inventors:
Mike Hughes, Alan Doeringg, Jack Johnson
Patented Case
View Patent ↗
Granted: May 27, 2003
Filed: Nov 22, 2000
Inventors
Mike Hughes
Alan Doeringg
Jack Johnson
Assignee (at issue)
Pet Care Systems, 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.