Granted Patent
Utility
US 6,419,768 · App. 09/770,211
Method for producing welded tubing having a uniform microstructure
Inventor:
John C. Tverberg
Patented Case
View Patent ↗
Granted: Jul 16, 2002
Filed: Jan 29, 2001
Inventor
John C. Tverberg
Assignee (at issue)
Crucible Materials 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.