Granted Patent
Utility
US 4,299,253 · App. 06/097,538
Pulsation dampener
Inventor:
James A. Burton
Patented Case
View Patent ↗
Granted: Nov 10, 1981
Filed: Nov 26, 1979
Inventor
James A. Burton
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.