Granted Patent
Utility
US 5,730,189 · App. 08/449,173
Internally and externally enhanced wielded tube
Inventors:
Myron R. Randlett, Jerome M. Dupy
Patented Case
View Patent ↗
Granted: Mar 24, 1998
Filed: May 24, 1995
Inventors
Myron R. Randlett
Jerome M. Dupy
Assignee (at issue)
Olin 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.