US3490532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of low-gravity viscous hydrocarbons
Assignee: Texaco Inc
•
Filing: 1967-12-18
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Granted: 1970-01-20
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Expires: 1987-12-18
Abstract
No abstract record available.
Inventors
- 👤 Joseph T Carlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:18
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/20; C; C09; C09K; C09K8/00; C09K8/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2813583A
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US2910424A
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US2924566A
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US3131759A
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US3108059A
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US3163214A
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US3330344A
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US3338814A
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US3330757A
Cited
US3392105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |