Granted Patent
Utility
US 4,276,755 · App. 05/952,612
Gas defrost system including heat exchange
Inventors:
Arthur Perez, Fayez F. Abraham
Patented Case
View Patent ↗
Granted: Jul 7, 1981
Filed: Oct 18, 1978
Inventors
Arthur Perez
Fayez F. Abraham
Assignee (at issue)
Tyler Refrigeration 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.