US3703535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diamido amino sulfonates and methods for preparing same
Assignee: Individual
•
Filing: 1971-04-30
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Granted: 1972-11-21
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Expires: 1991-04-30
Abstract
Abstract NOVEL COMPOUNDS OF THE FORMULA: R-CO-NH-C2H4-N(-C2H4-NH-CO-R1)-CH2-CH(-OH)-CH2-SO3-X WHEREIN R AND R1 ARE HYDROCARBON RADICALS; X IS AN ALKALI METAL, OR EQUIVALENT CATION. THEY ARE PRODUCED BY REACTING HYDROXY PROPANE SULTONE WITH CERTAIN DIAMIDO DERIVATIVES OF DIETHYLENE TRIAMINE.
Inventors
- 👤 Hans S Mannheimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:31
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/88
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) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |