Granted Patent
Utility
US 4,582,090 · App. 06/655,318
Tubular member thread protector
Inventors:
Kenneth V. Chase, Robert Campbell
Patented Case
View Patent ↗
Granted: Apr 15, 1986
Filed: Sep 27, 1984
Inventors
Kenneth V. Chase
Robert Campbell
Assignee (at issue)
Hydril Company
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.