Jon J. Harper
13Patents
5h-index
12Co-inventors
63Inventor score
Filing activity: Sep 2, 1975 → Nov 18, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5183933A | Process for preparing 2,6-naphthalene-dicarboxylic acid | Chemistry; Metallurgy | 27 | Expired |
| US4032563A | Process for the recovery of high purity diesters of terephthalic or isophthalic acids | Chemistry; Metallurgy | 24 | Expired |
| US4298580A | Separation of cobalt and manganese from trimellitic acid process residue by precipitating as carbonates, redissolving as halides and removing cobalt by magnetic means | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4827026A | Method for producing 5-t-butylisophthalic acid | Performing Operations; Transporting | 8 | Expired |
| US4311521A | Membrane separation of catalyst metals from trimellitic acid production and separation of cobalt from manganese | Performing Operations; Transporting | 5 | Expired |
| US4298759A | Separation of cobalt and manganese from trimellitic acid process residue by extraction, ion exchanger and magnet | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4312778A | Membrane separation of catalyst metals from aromatic acid production | Performing Operations; Transporting | 3 | Expired |
| US4278503A | Low bromine content glacial acetic acid | Emerging Cross-Sectional Technologies | 2 | Expired |
| US4309390A | Separation of cobalt and manganese from trimellitic acid process residue by extraction, pH adjustment, and magnet | Emerging Cross-Sectional Technologies | 2 | Expired |
| US4308240A | Recovery of cobalt and manganese from ash of residue from manufacture of trimellitic acid by acid extraction | Emerging Cross-Sectional Technologies | 2 | Expired |
| US4338464A | Removal of bromobutanone from acetic acid | Chemistry; Metallurgy | 1 | Expired |
| US11965859B1 | System and method for empirical estimation of life remaining in industrial equipment | Physics | 0 | Active |
| US4312714A | Decreasing 3-bromo-2-butanone content of acetic acid | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.