Granted Patent
Utility
US 4,230,592 · App. 06/044,396
Controlled foam detergent additive
Inventors:
Jack G. Miller, Thomas C. Tesdahl
Patented Case
View Patent ↗
Granted: Oct 28, 1980
Filed: May 31, 1979
Inventors
Jack G. Miller
Thomas C. Tesdahl
Assignee (at issue)
Chemed Corporation
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.