US2747751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for handling pipe in a derrick
Assignee: Exxon Mobil Corp
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Filing: 1951-11-03
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Granted: 1956-05-29
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Expires: 1971-11-03
Abstract
No abstract record available.
Inventors
- 👤 Albert L Stone
- 👤 Estates Palos Verdes
- 👤 George E Daverin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:21
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/14; E21B19/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
APPARATUS FOR USE IN A DERRICK HAVING A TRAVELLING BLOCK FLEXIBLY SUSPENDED FROM THE UPPER END OF THE DERRICK AT THE CENTER LINE THEREOF, COMPRISING A CABLE MEMBER ADAPTED TO BE MOUNTED SUBSTANTIALLY UPRIGHT IN THE DERRICK AND OF A LENGTH AT LEAST THAT OF A STAND OF PIPE TO BE RACKED IN THE DERRICK WITH A FIRST END FIXED TO THE DERRICK, A RUNNER MEMBER MOUNTED ON SAID BLOCK AND ENGAGING SAID CABLE MEMBER FOR GUIDED MOVEMENT THEREALONG AND A POWER DEVICE OPERATIVELY CONNECTED TO THE SECOND END OF SAID CABLE FOR VARYING THE EFFECTIVE LENGTH THEREOF
Claim 2
Dependent Claim
98 words
APPARATUS FOR USE IN A DERRICK HAVING A TRAVELLING BLOCK FLEXIBLY SUSPENDED FROM THE UPPER END OF THE DERRICK AT THE CENTER LINE THEREOF, COMPRISING A CABLE MEMBER ADAPTED TO BE MOUNTED SUBSTANTIALLY UPRIGHT IN THE DERRICK AND OF A LENGTH AT LEAST THAT OF A STAND OF PIPE TO BE RACKED IN THE DERRICK WITH A FIRST END FIXED TO THE DERRICK, A RUNNER MEMBER MOUNTED ON SAID BLOCK AND ENGAGING SAID CABLE MEMBER FOR GUIDED MOVEMENT THEREALONG AND A POWER DEVICE OPERATIVELY CONNECTED TO THE SECOND END OF SAID CABLE FOR VARYING THE EFFECTIVE LENGTH THEREOF
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) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |