Granted Patent
Utility
US 4,007,776 · App. 05/535,252
Heating and cooling system utilizing solar energy
Inventor:
Kalil A. Alkasab
Patented Case
View Patent ↗
Granted: Feb 15, 1977
Filed: Dec 23, 1974
Inventor
Kalil A. Alkasab
Assignee (at issue)
Universal Oil Products 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.