Granted Patent
Utility
US 4,255,641 · App. 05/903,398
Method of outside welding of pipelines
Inventors:
Talbert D. Connell, Eugene F. Sims
Patented Case
View Patent ↗
Granted: Mar 10, 1981
Filed: May 8, 1978
Inventors
Talbert D. Connell
Eugene F. Sims
Assignee (at issue)
Crutcher Resources 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.