Granted Patent
Utility
US 4,267,859 · App. 06/041,727
Protective inlet for gas regulator valve housing
Inventor:
Theodore J. Dykzeul
Patented Case
View Patent ↗
Granted: May 19, 1981
Filed: May 23, 1979
Inventor
Theodore J. Dykzeul
Assignee (at issue)
ROBERTSHAW CONTROLS PRIVATE LIMITED
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.