US3129982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil well pipe and casing protector
Assignee: Fawick Corp
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Filing: 1960-07-05
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Granted: 1964-04-21
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Expires: 1980-07-05
Abstract
No abstract record available.
Inventors
- 👤 Thomas L Fawick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:03
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1042; E21B17/105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN COMBINATION WITH AN OIL WELL PIPE INSIDE A CASING, A PROTECTOR ASSEMBLY COMPRISING UPPER AND LOWER SPLIT RINGS OF RUBBER-LIKE MATERIAL EXTENDING AROUND THE OUTSIDE OF THE PIPE, EACH OF SAID SPLIT RINGS HAVING A PLURALITY OF AXIALLY SPACED INTERNAL GROOVES THEREIN WHICH RUN CIRCUMFERENTIALLY AROUND THE INSIDE OF SAID SPLIT RING AND WHICH ARE OPEN THEREAT, AND RETAINING MEANS DETACHABLY MOUNTED ON EACH SPLIT RING AND HOLDING THE LATTER CONTRACTED AGAINST THE PIPE, THE LOWER SPLIT RING HAVING UPWARDLY FACING RECESSES IN ITS UPPER END, AND A PAIR OF HALF RINGS ENGAGED BETWEEN THE LOWER END OF THE UPPER SPLIT RINGS HAVING DEPENDING LUGS WHICH ARE SNUGLY RECEIVED IN SAID RECESSES IN THE UPPER END OF THE LOWER SPLIT RING.
Claim 2
Dependent Claim
122 words
IN COMBINATION WITH AN OIL WELL PIPE INSIDE A CASING, A PROTECTOR ASSEMBLY COMPRISING UPPER AND LOWER SPLIT RINGS OF RUBBER-LIKE MATERIAL EXTENDING AROUND THE OUTSIDE OF THE PIPE, EACH OF SAID SPLIT RINGS HAVING A PLURALITY OF AXIALLY SPACED INTERNAL GROOVES THEREIN WHICH RUN CIRCUMFERENTIALLY AROUND THE INSIDE OF SAID SPLIT RING AND WHICH ARE OPEN THEREAT, AND RETAINING MEANS DETACHABLY MOUNTED ON EACH SPLIT RING AND HOLDING THE LATTER CONTRACTED AGAINST THE PIPE, THE LOWER SPLIT RING HAVING UPWARDLY FACING RECESSES IN ITS UPPER END, AND A PAIR OF HALF RINGS ENGAGED BETWEEN THE LOWER END OF THE UPPER SPLIT RINGS HAVING DEPENDING LUGS WHICH ARE SNUGLY RECEIVED IN SAID RECESSES IN THE UPPER END OF THE LOWER SPLIT RING.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |