Patent US2953320A successfully refreshed from Google Patents.
Patent US3344862A successfully refreshed from Google Patents.
US3344862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined tubing anchor collar locator and swivel
Assignee: Individual
•
Filing: 1965-03-01
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Granted: 1967-10-03
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Expires: 1985-03-01
Abstract
No abstract record available.
Inventors
- 👤 Martin B Conrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:43
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/004; E21B23/006; E21B23/02; E21B29/00; E21B47/00; E21B47/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
93 words
A CASING COLLAR LOCATOR, COMPRISING: AN ELONGATE TUBULAR BODY ADAPTED TO BE CONNECTED IN A STRING OF PIPE TO BE RUN INTO A CASED WALL, FRICTION MEANS DISPOSED ABOUT SAID BODY AND FRICTIONALLY ENGAGEABLE WITH THE WELL CASING, CONTROL MEANS FOR RETAINING SAID BODY IN A FIRST POSITION AND OPERABLE TO ALLOW LONGITUDINAL MOVEMENT OF SAID BODY TO A SECOND POSITION RELATIVE TO SAID FRICTION MEEANS, COLLAR LOCATOR MEANS ON SAID BODY EXPANSIBLE TO ENGAGE SAID CASING, MEANS HOLDING SAID COLLAR LOCATOR MEANS RETRACTED WHEN SAID BODY IS IN SAID FIRST PPSITION, MEANS
References Cited (Backward Citations)
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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) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |