Patent US3513220A successfully refreshed from Google Patents.
US3513220A
Expired / Lapsed
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Specific gravity analyzer for control of an alkylation process
Assignee: Chevron USA Inc
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Filing: 1968-01-19
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Granted: 1970-05-19
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Expires: 1988-01-19
Abstract
No abstract record available.
Inventors
- 👤 Albert John Brandel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:10
CPC Classifications
G; G01; G01N; G01N9/00; G01N9/36; C; C07; C07C; C07C2/00; C07C2/54; C07C2527/00; C07C2527/02; C07C2527/053; C07C2527/054; Y; Y10; Y10S; Y10S585/00; Y10S585/919; Y10S585/921
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2592063A
Cited
US2850552A
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US2977199A
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US3259462A
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US3173969A
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US3293320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-18 | 1973-11-17 | 1974-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-18 | 1977-11-17 | 1978-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-18 | 1981-11-17 | 1982-05-19 | $7700.00 | Window Closed / Lapsed |