1
William C Allen, William M Rickard, Daniel P Hoyer, David E Stikkers, Matthew L Kelley: Dual gasket lined pipe connector. Union Oil Company of California, William O Jacobson, Gregory F Wirzbicki, April 11, 1995: US05405171 (96 worldwide citation)

A multi-piece, pipe joint seal has a slidable interface between seal pieces. The slidable interface allows for slippage between pieces during pipe joint assembly and disassembly, minimizing rotational and other stresses on the seal pieces and pipe sealing surfaces which may damage or endanger the de ...


2
William C Allen, David E Stikkers, Daniel P Hoyer: Glass fiber reinforced cement liners for pipelines and casings. Union Oil Company of California, Gregory F Wirzbicki, Alan H Thompson, July 22, 1997: US05649568 (9 worldwide citation)

Conduits having cement-containing liners for the inner and outer surfaces of metal pipes include a fibrous material, such as glass fibers, to prevent cracking and/or inhibit crack propagation.


3
William C Allen, William M Rickard, Daniel P Hoyer, David E Stikkers, Matthew J Kelley: Dual gasket lined pipe connector. Union Oil Company of California, Alan H Thompson, Gregory F Wirzbicki, October 22, 1996: US05566986 (3 worldwide citation)

A multi-piece, pipe joint seal has a slidable interface between seal pieces. The slidable interface allows for slippage between pieces during pipe joint assembly and disassembly, minimizing rotational and other stresses on the seal pieces and pipe sealing surfaces which may damage or endanger the de ...