Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6133190 | Supported mercaptosulfonic acid compounds useful as catalysts for phenolation reactions | Richard M. Wehmeyer, Marlin E. Walters | 2000-10-17 |
| 6051658 | Polymeric substrate containing mercapto and sulfonic groups | Richard M. Wehmeyer, Marlin E. Walters | 2000-04-18 |
| 5939494 | Polymeric substrate containing mercapto and sulfonic groups | Richard M. Wehmeyer, Marlin E. Walters | 1999-08-17 |
| 5723692 | Preparation of 4,4'-dihydroxy-'alkylstiblbene with reduced dimer formation | Katherine S. Clement, Robert E. Hefner, Jr., Louis L. Walker | 1998-03-03 |
| 5541282 | Aromatic polyhydroxy compounds and process for the preparation thereof | Marlin E. Walters, W. Frank Richey | 1996-07-30 |
| 5463140 | Process for making polyphenols from ketones or aldehydes and phenols | Richard M. Wehmeyer, Marlin E. Walters, Steven L. Brewster | 1995-10-31 |
| 5387725 | Chlorination process, alkylation of products of said process and some products thereof | Marlin E. Walters, W. Frank Richey, Katherine S. Clement, Steven L. Brewster, Paul M. Puckett +2 more | 1995-02-07 |
| 5382710 | Aromatic polyhydroxy compounds and process for the preparation thereof | Marlin E. Walters, W. Frank Richey | 1995-01-17 |
| 5136110 | Process for the preparation of bisphenols | Marlin E. Walters, W. Frank Richey | 1992-08-04 |
| 4859745 | Stratified fibrous fluoropolymer compositions and process for forming such fluoropolymers | William P. Carl, Robert E. Aikman, Jr. | 1989-08-22 |
| 4808440 | Process for the surface treatment of polymer articles to provide for better adherence of paints | — | 1989-02-28 |
| 4800186 | Regeneration of fluorocarbonsulfonic acid catalysts | — | 1989-01-24 |
| 4791081 | Supported fluorocarbonsulfonic acid polymers and an improved method for their preparation | David L. Childress, John D. Weaver | 1988-12-13 |
| 4602110 | Method of purifying 3-chloro-2-hydroxypropyl trialkylammonium chloride | — | 1986-07-22 |
| 4533653 | Preparation of an improved catalyst for the manufacture of naphthoquinone | Nobuyuki Ishibe, Renard L. Thomas | 1985-08-06 |
| 4530601 | Quantitative test for residual rosin on cleaned circuit boards | — | 1985-07-23 |
| 4524011 | Flux removal solvent blend | Susan M. Dallessandro, Warren F. Richey | 1985-06-18 |
| 4464528 | Process for making cationic starch | — | 1984-08-07 |