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Patent applications and USPTO patent grants for Harper; Jon J..The latest application filed is for "process for preparing 2,6-naphthalene-dicarboxylic acid".
Patent | Date |
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Process for preparing 2,6-naphthalene-dicarboxylic acid Grant 5,183,933 - Harper , et al. February 2, 1 | 1993-02-02 |
Membrane separation of catalyst metals from aromatic acid production Grant 4,312,778 - Harper January 26, 1 | 1982-01-26 |
Separation of cobalt and manganese from trimellitic acid process residue by extraction, ion exchanger and magnet Grant 4,298,759 - Harper , et al. November 3, 1 | 1981-11-03 |
Separation of cobalt and manganese from trimellitic acid process residue by precipitating as carbonates, redissolving as halides and removing cobalt by magnetic means Grant 4,298,580 - Harper , et al. November 3, 1 | 1981-11-03 |
Process for the recovery of high purity diesters of terephthalic or isophthalic acids Grant 4,032,563 - Harper , et al. June 28, 1 | 1977-06-28 |
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