US3177941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locator for collars in well casings
Assignee: Dow Chemical Co
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Filing: 1963-07-22
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Granted: 1965-04-13
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Expires: 1983-07-22
Abstract
No abstract record available.
Inventors
- 👤 Martin B Conrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:09
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/02; E21B47/00; E21B47/09
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
129 words
IN A LOCATOR FOR COLLARS JOINING TUBULAR LENGTHS OF PIPE: A SUPPORT MEMBER ADAPTED TO BE MOVED LONGITUDINALLY WITHIN THE LENGHTS; AND A SENSING STRUCTURE CARRIED BY THE SUPPORT MEMBER, COMPRISING: A RESILIENT ARCHED ELEMENT EXTENDING OBLIQUENLY WITH RESPECT TO THE LONGITUDINAL DIRECTION OF MOTION OF THE SUPPORT MEMBERS; SAID ARCHED ELEMENT BEING ADAPTED TO CONTACT A COLLAR BETWEEN PIPE LENGHTS; AND MEANS FOR MOUNTING SAID ARCHED ELEMENT ON THE SUPPORT MEMBER IN SUCH MANNER AS TO CAUSE AN ANGULAR MOVEMENT OF THE ARCHED ELEMENT WHEN THE SUPPORT MEMBER IS MOVED IN ONE DIRECTION AND THE ARCHED ELEMENT IS IN CONTACT WITH A COLLAR, SO AS TO DEPRESS THE ARCH AS THE ARCH PASSES TO A POSITION NORMAL TO THE DIRECTION OF MOVEMENT OF THE SUPPORT MEMBER, AND TO
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) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |