Alkylthioamido sulfonic acids and derivatives thereof
Abstract
Abstract The invention is directed to alkylthio alkylamido sulfonic acids and salts of the formula ##STR1## R 6 is unsubstituted or substituted alkyl, cycloalkyl or phenyl, alkylthio, tert-alkylamine, furfuryl or a group derived from a polyfunctional mercaptan, R 1 is hydrogen or lower alkyl and each of R 2 , R 4 and R 5 is individually hydrogen or a hydrocarbon radical. R 3 is hydrogen, alkyl, aryl or pyridyl, M is hydrogen, a monovalent alkali metal, an alkaline earth metal, an organic base or ammonium, and n is an integer corresponding to the valency of M. Said compounds are prepared by a base catalyzed addition reaction of a reactive mercaptan to an alkylenylamidoalkane sulfonic acid salt. The compounds are useful as surfactants.
Inventors
- 👤 Robert Ernest Arthur Dear
- 👤 Eduard Karl Kleiner
Bibliographic Details
Claims Analysis
Total Claims: 9References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-12-28 | 1980-06-28 | 1980-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-28 | 1984-06-28 | 1984-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-28 | 1988-06-28 | 1988-12-28 | $7700.00 | Window Closed / Lapsed |