Granted Patent
Utility
US 4,437,317 · App. 06/352,473
Head pressure maintenance for gas defrost
Inventor:
Fayez F. Ibrahim
Patented Case
View Patent ↗
Granted: Mar 20, 1984
Filed: Feb 26, 1982
Inventor
Fayez F. Ibrahim
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.