Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE44175 | Process for preparing 4-aminodiphenylamines | Ralph Albert Genetti, Edward Albert Lambers, Antonius Johannes van Hengstum | 2013-04-23 |
| 7824538 | Process for improving the purity of quaternary ammonium hydroxides by electrolysis in a two-compartment cell | Fred Korpel, Gerrit Jan Boerman | 2010-11-02 |
| 7504539 | Process for preparing 4-aminodiphenylamine intermediates | Ralph Triplett | 2009-03-17 |
| 7183439 | Process for preparing 4-aminodiphenylamine intermediates | Ralph Triplett | 2007-02-27 |
| 6770189 | Process for improving the purity of quaternary ammonium hydroxides by electrolysis | Anna Giatti, Fred Korpel, Gerrit Jan Boerman | 2004-08-03 |
| 6583320 | Process for preparing 4-aminodiphenylamine intermediates | Ralph Triplett | 2003-06-24 |
| 6395933 | Process for preparing 4-aminodiphenylamine intermediates | Ralph Triplett | 2002-05-28 |
| 6140538 | Process for preparing 4-aminodiphenylamines | Ralph Albert Genetti, Edward Albert Lambers, Antonius Johannes van Hengstum | 2000-10-31 |
| 5608111 | Method of preparing 4-aminodiphenylamine | Michael K. Stern, James Malcolm Allman, James K. Bashkin | 1997-03-04 |
| 5204481 | Process for preparing benzothiazole sulfenimides using an aliphatic hydrocarbon solvent | Sharen B. Carroll, Horng-Jau Lin | 1993-04-20 |