Patent US3105550A successfully refreshed from Google Patents.
US3105550A
Expired / Lapsed
US
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Magnetically actuated well working tool
Assignee: Camco Inc
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Filing: 1961-01-30
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Granted: 1963-10-01
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Expires: 1981-01-30
Abstract
No abstract record available.
Inventors
- 👤 Harry C Ehlert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:03
CPC Classifications
E; E21; E21B; E21B41/00; E21B41/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
111 words
IN A WELL TOOL ADAPTED TO BE RUN IN A WELL AND TO BE ACTUATED UPON RECEIPT OF A SIGNAL FROM A SUBSURFACE SIGNALING STATION, A TOOL BODY, AN ELECTRICALLY ACTUATED ELEMENT CARRIED BY THE BODY, A FIRST CIRCUIT CLOSING DEVICE AND A SECOND CIRCUIT CLOSING DEVICE CONNECTED IN SERIES CIRCUIT RELATION AND OPERATIVE TO ACTUATE SAID ELEMENT WHEN THE DEVICES ARE CONCURRENTLY IN CIRCUIT CLOSING RELATION, SIGNAL RESPONSIVE MEANS TO EFFECT CIRCUIT CLOSING RELATION OF THE FIRST DEVICE, AND A WELL FLUID PRESSURE RESPONSIVE CONTROL MEMBER CONNECTED WITH THE SECOND CIRCUIT CLOSING DEVICE AND SHIFTABLY MOUNTED ON THE TOOL BODY FOR MOVEMENT BETWEEN CIRCUIT OPENING POSITION AND CIRCUIT CLOSING POSITION.
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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) | 1966-09-30 | 1967-04-01 | 1967-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-30 | 1971-04-01 | 1971-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-30 | 1975-04-01 | 1975-10-01 | $7700.00 | Window Closed / Lapsed |