US2950761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple string well packers
Assignee: BROWN
•
Filing: 1957-08-12
•
Granted: 1960-08-30
•
Expires: 1977-08-12
Abstract
No abstract record available.
Inventors
- 👤 Cicero C Brown
- 👤 Chudleigh B Cochran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:25
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/122
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1014272A
Cited
US1050689A
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US1530783A
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US2253092A
Cited
US2467801A
Cited
US2605637A
Cited
US2764243A
Cited
US2791277A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-30 | 1964-02-29 | 1964-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-30 | 1968-02-29 | 1968-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-30 | 1972-02-29 | 1972-08-30 | $7700.00 | Window Closed / Lapsed |