Granted Patent
Utility
US 4,393,659 · App. 06/384,014
Method and apparatus for producing sterile slush ice
Inventors:
Richard M. Keyes, Stephen W. Schwitters
Patented Case
View Patent ↗
Granted: Jul 19, 1983
Filed: Jun 1, 1982
Inventors
Richard M. Keyes
Stephen W. Schwitters
Assignee (at issue)
Taylor Freezer Company
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.