Granted Patent
Utility
US 4,501,126 · App. 06/569,177
Method and apparatus for liquid freezing
Inventor:
John Norton
Patented Case
View Patent ↗
Granted: Feb 26, 1985
Filed: Jan 9, 1984
Inventor
John Norton
Assignee (at issue)
Engineered Air Systems
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.