US3644499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing detergent sulfonates
Assignee: Gulf Research and Development Co
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Filing: 1968-12-17
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Granted: 1972-02-22
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Expires: 1988-12-17
Abstract
Abstract A PROCESS FOR STABILIZIING THE PH OF SULFONATES OBTAINED FROM THE REACTION OF AN OLEFINIC COMPOUND WITH AN ALKALI BISULFITE WHICH INVOLVES CONTACTING AN AQUEOUS SLURRY OF SUCH SULFONATES CONTAINING AN ALKALINE COMPOUND WITH OXYGEN.
Inventors
- 👤 Clarence R Murphy
- 👤 Anatoli Onopchenko
- 👤 John M Piatt
- 👤 Richard Seckircher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:15
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/42; C07C313/00; C07C313/02; C07C313/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |