Granted Patent
Utility
US 4,397,399 · App. 06/299,830
Seal for floating roofs of storage tanks
Inventor:
Robert B. Wagoner
Patented Case
View Patent ↗
Granted: Aug 9, 1983
Filed: Sep 8, 1981
Inventor
Robert B. Wagoner
Assignee (at issue)
Tank Services, Incorporated
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.