Granted Patent
Utility
US 4,872,914 · App. 07/187,846
High purity, high temperature pipe thread sealant paste
Inventor:
Ronald A. Howard
Patented Case
View Patent ↗
Granted: Oct 10, 1989
Filed: Apr 29, 1988
Inventor
Ronald A. Howard
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.