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Patent applications and USPTO patent grants for Allenson; Stephan J..The latest application filed is for "enzymatically degradable fluid loss additive".
Patent | Date |
---|---|
Reverse emulsion breaking method using amine containing polymers Grant 5,032,285 - Braden , et al. * July 16, 1 | 1991-07-16 |
Enzymatically degradable fluid loss additive Grant 5,032,297 - Williamson , et al. July 16, 1 | 1991-07-16 |
Additive and method for temporarily reducing permeability of subterranean formations Grant 4,997,581 - Williamson , et al. March 5, 1 | 1991-03-05 |
Bimodal cationics for water clarification Grant 4,699,951 - Allenson , et al. October 13, 1 | 1987-10-13 |
Bimodal cationics for water clarification Grant 4,588,508 - Allenson , et al. May 13, 1 | 1986-05-13 |
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