Issued Patents All Time
Showing 1–25 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6891073 | Chemical reactor system and process | Allen Ko, Michael D. Szillat, Brian Carvill | 2005-05-10 |
| 6703530 | Chemical reactor system and process | Allen Ko, Michael D. Szillat, Brian Carvill | 2004-03-09 |
| 6680270 | Regeneration of catalysts used in the manufacture of bisphenols | Rudy Francois Alain Jos Peemans, Alexey Kruglov, Sheldon J. Shafer, Chuks O. Mbeledogu, Darlene Hope Nance +3 more | 2004-01-20 |
| 6545187 | Production of low-particulate bisphenol and use thereof in the manufacturing of polycarbonate | Fang Christine Chen, James C. Blubaugh, Darlene Hope Nance, Edward Brittain Stokes, Juan Rodriguez Ordonez +1 more | 2003-04-08 |
| 6486222 | Combination ion exchange resin bed for the synthesis of bisphenol A | Sheldon J. Shafer, Harish Radhakrishna Acharya, Rudy Francois Alain Jos Peemans, Eduard Hendricus Schlarmann | 2002-11-26 |
| H1943 | Process for the manufacture of bisphenol-A | Ryozo Sato | 2001-02-06 |
| 6130359 | Liquid vacuum pump seal to reduce contamination in bisphenol-A | — | 2000-10-10 |
| 5969167 | Method for making tris(hydroxyphenyl) compounds using ion exchange resins | Swaminathan Sivaram, Vishnu Ramchandra Ranade, Srinivasan Chakrapani, Prakash P. Wadgonkar, Paul Dean Sybert +1 more | 1999-10-19 |
| 5783733 | Process for manufacture of bisphenol | — | 1998-07-21 |
| 5773633 | Process for crystallizing chroman-I from an impure mixture | — | 1998-06-30 |
| 5756781 | Method for making tris(hydroxyphenyl) compounds using ion exchange | Paul Dean Sybert, Ashok K. Mendiratta | 1998-05-26 |
| 5475152 | Process and composition | Nicholas P. Wynn | 1995-12-12 |
| 5434316 | Purification of bisphenol-A | — | 1995-07-18 |
| 5382708 | Process for inhibiting dihydric phenol degradation and color formation and composition thereof | — | 1995-01-17 |
| 5362900 | Process and composition | Nicholas P. Wynn | 1994-11-08 |
| 5315042 | Use of partial acetone conversion for capacity increase and quality/yield improvement in the bisphenol-A reaction | Michael J. Cipullo, Isabel M. Matos | 1994-05-24 |
| 5304689 | Stabilization of color in production of paracumylphenol using hypophosphorous acid | — | 1994-04-19 |
| 5243093 | Process and composition | Nicholas P. Wynn | 1993-09-07 |
| 5225518 | Polycarbonate preparation from molten bisphenol-A/water mixture | — | 1993-07-06 |
| 5185475 | Process for preparing paracumylphenol | — | 1993-02-09 |
| 4902836 | Process for inhibiting dihydric phenol degradation and color formation and composition thereof | — | 1990-02-20 |
| 4876391 | Process for preparation and purification of bisphenols | — | 1989-10-24 |
| 4876395 | Process for color stabilization of bisphenol-A | — | 1989-10-24 |
| 4847433 | Process for preparing bisphenol-A | — | 1989-07-11 |
| 4740634 | Process for crystallizing bisphenol-A | Isabel M. Gomes de Matos | 1988-04-26 |