Granted Patent
Utility
US 4,022,248 · App. 05/616,117
Pipe having insulating material and cover and having two strips of self-sealing adhesive material
Inventors:
Jack J. Hepner, Richard S. Hite
Patented Case
View Patent ↗
Granted: May 10, 1977
Filed: Sep 24, 1975
Inventors
Jack J. Hepner
Richard S. Hite
Assignee (at issue)
Owens-Corning Fiberglas Corp.
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.