Patent US3920731A successfully refreshed from Google Patents.
US3920731A
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Detergent compounds
Assignee: Lever Brothers Co
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Filing: 1974-08-29
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Granted: 1975-11-18
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Expires: 1994-08-29
Abstract
Abstract Novel betaines and amine oxides of generic formula: are derivable from alkenyl succinates and have good detergency in unbuilt formulations.
Inventors
- 👤 Appaya Raghunath Naik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:41
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/44; A61Q; A61Q5/00; A61Q5/02; C; C07; C07C; C07C291/00; C07C291/02; C07C291/04; C11; C11D; C11D1/00; C11D1/66; C11D1/75; C11D1/88; C11D1/90
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
5 words
CHEMICAL COMPOUNDS OF THE FORMULA
Claim 2
Dependent Claim
5 words
CHEMICAL COMPOUNDS OF THE FORMULA
Claim 3
Dependent Claim
19 words
Chemical compounds according to claim 1 wherein the alkyl or alkenyl group has from 12 to 16 carbon atoms.
References Cited (Backward Citations)
US3751451A
Cited
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 |