Granted Patent
Utility
US 4,411,039 · App. 06/329,064
Removal of condensed gas from the walls of gas pipelines
Inventors:
Cyril Timmins, John J. Templeman
Patented Case
View Patent ↗
Granted: Oct 25, 1983
Filed: Dec 9, 1981
Inventors
Cyril Timmins
John J. Templeman
Assignee (at issue)
British Gas
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.