Granted Patent
Utility
US 4,515,397 · App. 06/481,237
Vacuum insulated conduit
Inventors:
Jeffert John Nowobilski, Kenneth C. Kather
Patented Case
View Patent ↗
Granted: May 7, 1985
Filed: Apr 1, 1983
Inventors
Jeffert John Nowobilski
Kenneth C. Kather
Assignee (at issue)
Union Carbide 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.