US3459265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for recovering viscous oil by steam drive
Assignee: Pan American Petroleum Corp
•
Filing: 1967-07-28
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Granted: 1969-08-05
•
Expires: 1987-07-28
Abstract
No abstract record available.
Inventors
- 👤 Thomas S Buxton
- 👤 Jack L Shelton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:31
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2897894A
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US3080917A
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US3064728A
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US3266569A
Cited
US3252512A
Cited
US3373804A
Cited
US3333637A
Cited
US3354958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-04 | 1973-02-03 | 1973-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-04 | 1977-02-03 | 1977-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-04 | 1981-02-03 | 1981-08-05 | $7700.00 | Window Closed / Lapsed |