US3111171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination float shoe and spiral cement mlxer
Assignee: Individual
•
Filing: 1961-03-17
•
Granted: 1963-11-19
•
Expires: 1981-03-17
Abstract
No abstract record available.
Inventors
- 👤 Willie W Farrar
- 👤 William R Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:56
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
THE COMBINATION OF A FLOAT SHOE AND CEMENT MIXER FOR USE ON THE LOWER END OF A WELL CASING, COMPRISING A HOLLOW, THREADED, CYLINDRICAL MEMBER ADAPTED TO THREADABLY ATTACH TO THE LOWER END OF SAID WELL CASING, A VALVE SEAT ATTACHABLY POSITIONED WITHIN SAID HOLLOW, THREADED, CYLINDRICAL MEMBER BELOW THE LOWER END OF SAID WELL CASING A SCREW THREADED, HOLLOW BODY HAVING AN AXIAL OPENING FORMED THERETHROUGH, WHICH HOLLOW BODY THREADABLY ENGAGES THE LOWER END OF SAID HOLLOW, THREADED, CYLINDRICAL MEMBER, A PLURALITY OF CIRCUMFERENTIALLY SPACED RIBS FORMED ON THE INNER HOLLOW PORTION OF SAID HOLLOW BODY AND EXTENDING INWARDLY TOWARD THE AXIS FOR A SPACED DISTANCE, WHICH RIBS EXTEND THROUGHOUT THE GREATER PORTION OF THE LENGTH OF SAID HOLLOW, THREADED, CYLINDRICAL MEMBER, THE UPPER PORTION OF WHICH RIBS ARE SUBSTANTIALLY VERTICALLY ARRANGED TO FORM UPRIGHT GUIDEWAYS, THE LOWER PORTIONS OF WHICH RIBS BEING SPIRALLY ARRANGED TO EXTEND OVER AT LEAST
Claim 2
Dependent Claim
151 words
THE COMBINATION OF A FLOAT SHOE AND CEMENT MIXER FOR USE ON THE LOWER END OF A WELL CASING, COMPRISING A HOLLOW, THREADED, CYLINDRICAL MEMBER ADAPTED TO THREADABLY ATTACH TO THE LOWER END OF SAID WELL CASING, A VALVE SEAT ATTACHABLY POSITIONED WITHIN SAID HOLLOW, THREADED, CYLINDRICAL MEMBER BELOW THE LOWER END OF SAID WELL CASING A SCREW THREADED, HOLLOW BODY HAVING AN AXIAL OPENING FORMED THERETHROUGH, WHICH HOLLOW BODY THREADABLY ENGAGES THE LOWER END OF SAID HOLLOW, THREADED, CYLINDRICAL MEMBER, A PLURALITY OF CIRCUMFERENTIALLY SPACED RIBS FORMED ON THE INNER HOLLOW PORTION OF SAID HOLLOW BODY AND EXTENDING INWARDLY TOWARD THE AXIS FOR A SPACED DISTANCE, WHICH RIBS EXTEND THROUGHOUT THE GREATER PORTION OF THE LENGTH OF SAID HOLLOW, THREADED, CYLINDRICAL MEMBER, THE UPPER PORTION OF WHICH RIBS ARE SUBSTANTIALLY VERTICALLY ARRANGED TO FORM UPRIGHT GUIDEWAYS, THE LOWER PORTIONS OF WHICH RIBS BEING SPIRALLY ARRANGED TO EXTEND OVER AT LEAST
References Cited (Backward Citations)
US2116408A
Cited
US2204658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-18 | 1967-05-20 | 1967-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-18 | 1971-05-20 | 1971-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-18 | 1975-05-20 | 1975-11-19 | $7700.00 | Window Closed / Lapsed |