Granted Patent
Utility
US 4,748,787 · App. 06/881,547
Pipe flange fire-proofing kit and process
Inventor:
Gerold J. Harbeke
Patented Case
View Patent ↗
Granted: Jun 7, 1988
Filed: Jul 2, 1986
Inventor
Gerold J. Harbeke
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.