US3598737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant compositions
Assignee: Shell USA Inc
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Filing: 1969-04-17
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Granted: 1971-08-10
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Expires: 1989-04-17
Abstract
Abstract LUBRICANT COMPOSITIONS CONTAINING OIL-SOLUBLE COPOLYMERS OF ONE OR MORE ALKY ESTERS OF A C3-5 ALPHA, BETAVINYLIDENE MONOCARBOXYLIC ACID AND ONE OR MORE MONOHYDROXY ALKYL ESTERS OF A C3-5 ALPHA, BETA-VINYLLIDENE MONOCARBOXYLIC ACID, WHEREIN THE AVERAGE NUMBER OF THE CARBON ATOMS IN THE CH3-(CH2)N- GROUPS PRESENT IN THE ALKYL SIDE CHAINS, N BEING AT LEAT 9, IS FROM 12.5 TO 14.3, HAVE IMPROVED POUR POINTS, VISCOSITY INDICES AND DISPERSANT PROPERTIES.
Inventors
- 👤 Pieter H Van Der Meij
- 👤 Johannes M Wortel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:29
CPC Classifications
C; C10; C10M; C10M145/00; C10M145/02; C10M145/10; C10M145/12; C10M145/14; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1812; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/026; C10M2207/40; C10M2207/404; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/082; C10M2209/084; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10N; C10N2050/00; C10N2050/10; C10N2070/00; C10N2070/02; Y; Y10; Y10S; Y10S526/00; Y10S526/933
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |