US3920569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detergent composition having substituted phthalic acid salt builder
Assignee: Lever Brothers Co
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Filing: 1973-02-09
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Granted: 1975-11-18
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Expires: 1993-02-09
Abstract
Abstract Salts of aromatic 1,2-dicarboxylic acids having hydrophobic groups attached to the benzene ring, especially alkali metal salts of C10-C20 alkyl and alkenyl phthalic acids, are used as detergency builders.
Inventors
- 👤 Phillip Alfred Carson
- 👤 Peter Tissington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:03
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/20; C11D3/2075; C11D3/2082; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/255; C07C51/265; C07C63/00; C07C63/14; C07C65/00; C07C65/01; C07C65/03; C07C65/05; C11D3/2093; C07C2527/00; C07C2527/02; C07C2527/053; C07C2527/055
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
32 words
A DETERGENT COMPOSITION COMPRISING AN ANIONIC NONIONIC AMPHOTEERIC OR ZWITTERIONIC DETERGENT ACTIVE COMPOUND AND AS A DETERGENCY BUILDER A WATER SOLUBLE OR DISPERSIBLE SALT OF A SUBSTITUTED PHTHALIC ACID HAVING THE FORMULA:
Claim 2
Dependent Claim
32 words
A DETERGENT COMPOSITION COMPRISING AN ANIONIC NONIONIC AMPHOTEERIC OR ZWITTERIONIC DETERGENT ACTIVE COMPOUND AND AS A DETERGENCY BUILDER A WATER SOLUBLE OR DISPERSIBLE SALT OF A SUBSTITUTED PHTHALIC ACID HAVING THE FORMULA:
Claim 3
Dependent Claim
20 words
A detergent composition according to claim 1, wherein the alkyl or alkenyl group is attached directly to the benzene ring.
Claim 4
Dependent Claim
20 words
A detergent composition according to claim 1, wherein the detergency builder is used in the form of the sodium salt.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |