Patent US3424679A successfully refreshed from Google Patents.
US3424679A
Expired / Lapsed
US
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Nonvicinal glycols in overbased phenate preparation
Assignee: Chevron USA Inc
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Filing: 1966-08-15
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Granted: 1969-01-28
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Expires: 1986-08-15
Abstract
No abstract record available.
Inventors
- 👤 Nylen L Allphin Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:18
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/12; C10M159/20; C10M159/22; C10M2205/00; C10M2209/00; C10M2209/10; C10M2209/103; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/046; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10N; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA589609A
Cited
US2680096A
Cited
US2680097A
Cited
US3036971A
Cited
US3194761A
Cited
US3178368A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |