Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8618038 | Compositions for removing lead from metal surfaces | David L. Hunt | 2013-12-31 |
| 7771542 | Compositions and methods for removing lead from metal surfaces | David L. Hunt | 2010-08-10 |
| 5292934 | Method for preparing aromatic carboxylic acids | David L. Sikkenga, Paul K. Behrens, Martin A. Zeitlin, Stephen V. Hoover | 1994-03-08 |
| 5183933 | Process for preparing 2,6-naphthalene-dicarboxylic acid | Jon J. Harper, Keith D. Larson, Rosemary F. McMahon, Paul A. Sanchez | 1993-02-02 |
| 5097066 | Process for purification of aromatic dicarboxylic acids | Juergen K. Holzhauer | 1992-03-17 |
| 4950786 | Method for making 2,6-naphthalene dicarboxylic acid | Paul A. Sanchez, David A. Young, Walter Partenheimer, Wayne P. Schammel | 1990-08-21 |
| 4900865 | Method for producing a di-(mono- or poly-)carboxyaryl ether | Gregory P. Hussmann, Juergen K. Holzhauer | 1990-02-13 |
| 4772742 | Polyacyl aryl arylates | James Spanswick | 1988-09-20 |
| 4709080 | Polyacyl aryl arylates | James Spanswick | 1987-11-24 |
| 4485244 | Thermal process for the liquefaction of aromatic hydrocarbon oxidation residues and recovery of acetic acid | Joseph D. Fox, John G. Hundley | 1984-11-27 |
| 4434244 | Maleic anhydride catalyst recycle | Stephen V. Hoover | 1984-02-28 |
| 4387243 | Continuous production of ortho-phthalic acid product by two-step catalytic neat oxidation of liquid ortho-xylene with air | Houssam M. Naim, Nicholas C. Huie | 1983-06-07 |
| 4358600 | Process for the manufacture of maleic anhydride having improved age molten color | Juergen K. Holzhauer | 1982-11-09 |
| 4322549 | Oxidation of di- and trimethyl aromatic hydrocarbons having ortho-oriented methyl groups in liquid phthalic acid | Alan G. Bemis | 1982-03-30 |
| 4299977 | Preparation of phthalic acid by solventless oxidation of liquid ortho-xylene | Alan G. Bemis | 1981-11-10 |
| 4215055 | Production of liquid ortho-phthalic acid and its conversion to high _purity phthalic anhdyride | David Aaron Palmer, Sydney G. Horsfield, Hobe Schroeder | 1980-07-29 |
| 4215052 | Production of liquid ortho-phthalic acid and its conversion to high purity phthalic anhydride | Hobe Schroeder, David Aaron Palmer, Houssam M. Naim, Nicholas C. Huie | 1980-07-29 |
| 4215053 | Production of ortho-phthalic acid and its conversion and recovery of phthalic anhydride | David Aaron Palmer, Houssam M. Naim, Nicholas C. Huie, Hobe Schroeder | 1980-07-29 |
| 4215054 | Production of liquid ortho-phthalic acid and its conversion to high purity phthalic anhydride | Hobe Schroeder, Sydney G. Horsfield, David Aaron Palmer | 1980-07-29 |
| 4211881 | Preparation of phthalic acid by single step continuous air oxidation of liquid ortho-xylene | Sydney G. Horsfield, Alan G. Bemis | 1980-07-08 |