Granted Patent
Utility
US 6,683,268 · App. 09/870,015
Application of a hybrid arc/laser process to the welding of pipe
Inventors:
Francis Briand, Christian Bonnet
Patented Case
View Patent ↗
Granted: Jan 27, 2004
Filed: May 31, 2001
Inventors
Francis Briand
Christian Bonnet
Assignee (at issue)
L'Air Liquide, Société Anonyme à Directoire et Conseil de Surveillance pour l'Étude et l'Exploitation des Procédés Georges Claude
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.