IP Library › Granted Patent US 4,087,231
Granted Patent Utility
US 4,087,231 · App. 05/774,955

Slow-opening gas valve

Inventor: Russell B. Matthews
Patented Case View Patent ↗
Granted: May 2, 1978 Filed: Mar 7, 1977
Inventor
Russell B. Matthews
Assignee (at issue)
Johnson Controls, Inc.

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.

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Quick Facts
Patent No.
US 4,087,231
App. No.
05/774,955
Filed
1977-03-07
Granted
1978-05-02
Kind
A