Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10190262 | Optical brightening agent composition | Yu-Lin Huang, Tseng-Peng Li, Chih-Wen Yeh | 2019-01-29 |
| 6599326 | Inhibition of pulp and paper yellowing using hydroxylamines and other coadditives | Raymond Seltzer, David Devore, Glen T. Cunkle, Cyril Heitner, John Schmidt +2 more | 2003-07-29 |
| 6500303 | Inhibition of pulp and paper yellowing using nitroxides, hydroxylamines and other coadditives | Raymond Seltzer, Jean-Pierre Wolf, Cyril Heitner, John Schmidt, Peter F. McGarry +1 more | 2002-12-31 |
| 6447644 | Inhibition of pulp and paper yellowing using nitroxides, hydroxylamines and other coadditives | Raymond Seltzer, Jean-Pierre Wolf, Cyril Heitner, John Schmidt, Peter F. McGarry +1 more | 2002-09-10 |
| 6254724 | Inhibition of pulp and paper yellowing using nitroxides, hydroxylamines and other coadditives | Raymond Seltzer, Jean-Pierre Wolf, Cyril Heitner, John Schmidt, Peter F. McGarry +1 more | 2001-07-03 |
| 5902454 | Method of whitening lignin-containing paper pulps | — | 1999-05-11 |
| 4551305 | Reduction of organic waste odors | — | 1985-11-05 |
| 4453004 | Process for the alkylation of phenolic compounds | — | 1984-06-05 |
| 4453017 | Process for the methylation of phenolic compounds with trimethyl phosphate | — | 1984-06-05 |
| 4453018 | Process for the alkylation of phenolic compounds with alkyl sulfites | — | 1984-06-05 |