Granted Patent
Utility
US 5,580,657 · App. 08/194,071
Durable polymeric deposits on inorganic material substrate
Inventors:
Robert A. Schleifstein, Edward P. Smith
Patented Case
View Patent ↗
Granted: Dec 3, 1996
Filed: Feb 8, 1994
Inventors
Robert A. Schleifstein
Edward P. Smith
Assignee (at issue)
Potters Industries, LLC
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.