Granted Patent
Utility
US 4,241,180 · App. 05/881,224
Enzymatic method for determining surfactants on surfaces
Inventors:
Melvin H. Keyes, Garry L. Moore
Patented Case
View Patent ↗
Granted: Dec 23, 1980
Filed: Feb 27, 1978
Inventors
Melvin H. Keyes
Garry L. Moore
Assignee (at issue)
Owens-Illinois 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.