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Patent applications and USPTO patent grants for Portwood; Owen.The latest application filed is for "diquaternary compounds useful as bleach activators, and compositions containing them".
Patent | Date |
---|---|
Diquaternary compounds useful as bleach activators, and compositions containing them Grant 5,662,827 - Steiger , et al. September 2, 1 | 1997-09-02 |
Diquaternary bleach activators and compositions containing them Grant 5,399,746 - Steiger , et al. March 21, 1 | 1995-03-21 |
Process for preparing quaternary ammonium compounds Grant 4,982,000 - Earl , et al. January 1, 1 | 1991-01-01 |
Alkoxy derivatives of hydroxy aminimides Grant 3,985,807 - Grimm , et al. October 12, 1 | 1976-10-12 |
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