Granted Patent
Utility
US 4,274,261 · App. 05/945,655
Closed cycle contrarotating gas turbine power plant utilizing helium as the working medium
Inventor:
John J. Horgan
Patented Case
View Patent ↗
Granted: Jun 23, 1981
Filed: Sep 25, 1978
Inventor
John J. Horgan
Assignee (at issue)
UNITED TECHNOLOGIES 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.