US3784486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alpha,alpha-carboxyalkoxy succinic acid compounds as detergent builders and sequestering agents
Assignee: Ethyl Corp
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Filing: 1971-06-16
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Granted: 1974-01-08
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Expires: 1991-06-16
Abstract
Abstract TO OBVIATE EUTROPHICATION OF WATER, NON-PHOSPHORUS DETERGENT BUILDERS AND SEQUESTERING AGENTS ARE PROVIDED. THESE ARE EITHER (A) A,A''-CARBOXYLALKOXY SUCCINIC ACIDS WHEREIN THE CARBOXYALKOXY RADICALS CONTAIN FROM 2 TO ABOUT 7 CARBON ATOMS, (B) WATER SOLUBLE SALTS OF SUCH ACIDS OR MIXTURES OF (A) AND (B). CONVENTIONAL DETERGENT ACTIVES MAY BE USED WITH THESE BUILDERS.
Inventors
- 👤 G Nelson
- 👤 T Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:51
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/14; D21H17/15; D21H17/16; C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C11; C11D; C11D3/00; C11D3/16; C11D3/20; C11D3/2075; C11D3/2089
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |