Patent US3294172A successfully refreshed from Google Patents.
US3294172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well tools, such as well packers
Assignee: Individual
•
Filing: 1963-08-05
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Granted: 1966-12-27
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Expires: 1983-08-05
Abstract
No abstract record available.
Inventors
- 👤 Cicero C Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:35
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1291; E21B33/1292
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
104 words
IN AN ANCHORING MEANS ASSEMBLY WHICH COMPRISES, A SUPPORT WITH MOVABLE UPPER AND LOWER EXPANDER CONES AND A GRIPPING ELEMENT CARRIER, THE IMPROVEMENT RESIDING IN A GRIPPING SLIP MOUNTED FOR RADIAL MOVEMENT IN SAID CARRIER, SAID GRIPPING SLIP COMPRISING A BODY HAVING ITS INNER SURFACE FORMED WITH INCLINED AREAS FOR CO-ACTION WITH THE UPPER AND LOWER EXPANDER CONES, THE UPPER PORTION OF THE OUTER SURFACE OF THE BODY HAVING GRIPPING TEETH FORMED THEREON AND THE LOWER PORTION OF SAID OUTER SURFACE BEING SMOOTH AND LYING IN A LONGITUDINAL PLANE INWARDLY OF THE LONGITUDINAL PLANE IN WHICH THE APEX OF EACH GRIPPING TOOTH IS DISPOSED.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |