Patent US2699991A successfully refreshed from Google Patents.
US2699991A
Expired / Lapsed
US
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Surface-active compounds and fuel compositions containing them
Assignee: California Research LLC
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Filing: 1951-12-22
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Granted: 1955-01-18
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Expires: 1971-12-22
Abstract
No abstract record available.
Inventors
- 👤 Richard D Stayner
- 👤 Robert A Stayner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:39
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C09; C09K; C09K23/00; C09K23/18; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/24; C10L1/2431; C10L1/2437; C10M2219/00; C10M2219/04; C10M2219/042; C10N; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
48 words
A HYDROCABON OIL COMPOSITION CONTAINING A SMALL AMOUNT SUFFICIENT TO INHIBIT LINE AND FILTER CLOGGING AND CORROSION OF A MEMBER OF THE GROUP CONSISTING OF 2-(N,NDI(ALKYLBENZYL)-N-METHYL AMMONIUM)-ETHYL SULFATES AND 2-(N-ALKYLBENZYL-N,N-DIMETHYL AMMONIUM)-ETHYL SULFATES HAVING A LONG-CHAIN ALKYL SUBSTITUENT OF FROM 9 TO 18 CARBON ATOMS ON THE BENZENE NUCLEUS.
References Cited (Backward Citations)
US2504977A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-17 | 1958-07-19 | 1959-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-17 | 1962-07-19 | 1963-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-17 | 1966-07-19 | 1967-01-18 | $7700.00 | Window Closed / Lapsed |