IP Library › Granted Patent US 4,315,630
Granted Patent Utility
US 4,315,630 · App. 06/154,668

Sealing ring for spigot and socket pipe joint

Inventors: David W. French, Robert W. Heisler, Antonio Maldarella, Jr., Gilbert W. VanHoy
Patented Case View Patent ↗
Granted: Feb 16, 1982 Filed: May 30, 1980
Inventors
David W. French
Robert W. Heisler
Antonio Maldarella, Jr.
Gilbert W. VanHoy
Assignee (at issue)
Johns Manville

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Quick Facts
Patent No.
US 4,315,630
App. No.
06/154,668
Filed
1980-05-30
Granted
1982-02-16
Kind
A