4. Seal for a joint or juncture
  5. Seal between relatively movable parts
  6. Relatively rotatable radially extending sealing face member

Virgil E. Springer

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Composition for blowout preventer

Stock material or miscellaneous articles – Composite – Of silicon containing
Patent

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Polymeric annular snubbing apparatus

Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent

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Reinforced carboxy nitrile polymer compositions containing parti

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
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