US3725286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detergent compositions
Assignee: Lever Brothers Co
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Filing: 1971-12-02
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Granted: 1973-04-03
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Expires: 1991-12-02
Abstract
Abstract FABRIC-WASHING DETERGENT COMPOSITIONS INCORPORATING, AS DETERGENCY BUILDERS, WATER-SOLUBLE OR WATER-DISPERSIBLE SALTS OF DICARBOXYLIC ACIDS HAVING THE GENERAL FORMULA: R1-CH(-X)-CH(-Y)-R2-CH(-COOH)-(CH2)N-COOH WHEREIN R1 IS A HYDROGEN ATOM OR AN ALKYL OR SUBSTITUTED ALKYL GROUP CONTAINING FROM 6 TO 20 CARBOON ATOMS, R2 IS AN ALKYLENE OR SUBSTITUTED ALKYLENE GROUP CONTAINING FROM 0 TO 4 CARBON ATOMS AND OPTIONALLY INCORPORATING HETERO ATOMS AS LINKING GROUPS, THE TOTAL NUMBER OF CARBON ATOMS IN GROUPS R1 AND R2 BEING FROM 6 TO 20, ONE OR BOTH OF X AND Y BEING NON-IONISABLE ATOMS OR GROUPS, ANY OTHER BEING HYDROGEN, AND N IS 0 TO 1, ARE DISCLOSED.
Inventors
- 👤 R Pettigrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:25
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/02; C11D1/04; C11D1/08; C11D3/00; C11D3/16; C11D3/20; C11D3/2075; C11D3/2096; C11D3/24; C11D3/26
Claims Analysis
Total Claims: 0
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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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |