Granted Patent
Utility
US 6,464,231 · App. 09/742,557
Bellows seal with spring-loaded radial secondary seal
Inventor:
Joel Burroughs
Patented Case
View Patent ↗
Granted: Oct 15, 2002
Filed: Dec 20, 2000
Inventor
Joel Burroughs
Assignee (at issue)
Flowserve Management 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.