Granted Patent
Utility
US 6,113,856 · App. 09/040,151
Method of making a pH and amine test element
Inventors:
Paul J. Lawrence, Peter U. Ly, David R. Shockey
Patented Case
View Patent ↗
Granted: Sep 5, 2000
Filed: Mar 17, 1998
Inventors
Paul J. Lawrence
Peter U. Ly
David R. Shockey
Assignee (at issue)
Litmus Concepts, 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.