Granted Patent
Utility
US 4,380,431 · App. 06/278,152
Technique for elevating the temperature of a fluid
Inventors:
Roy C. Carlson, Jr., Edward J. March
Patented Case
View Patent ↗
Granted: Apr 19, 1983
Filed: Jun 29, 1981
Inventors
Roy C. Carlson, Jr.
Edward J. March
Assignee (at issue)
Western Electric Company, Inc.
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.