Granted Patent
Utility
US 4,473,245 · App. 06/367,952
Pipe joint
Inventors:
George M. Raulins, George G. Grimmer
Patented Case
View Patent ↗
Granted: Sep 25, 1984
Filed: Apr 13, 1982
Inventors
George M. Raulins
George G. Grimmer
Assignee (at issue)
Otis Engineering 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.