Patent US3120872A successfully refreshed from Google Patents.
US3120872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Junk retriever
Assignee: Individual
•
Filing: 1960-02-19
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Granted: 1964-02-11
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Expires: 1980-02-19
Abstract
No abstract record available.
Inventors
- 👤 Edwin A Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:14
CPC Classifications
E; E21; E21B; E21B27/00; E21B27/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
A WELL TOOL FOR SECURING TO A WELL STRING TO BE LOWERED INTO A WELL BORE TO RECOVER OBJECTS THEREIN INCLUDING, AN ENLONGATED HOLLOW BODY OPEN AT ITS UPPER AND LOWER ENDS, A FITTING IN SAID BODY, SAID FITTING HAVING A PLURALITY OF RADIALLY SPACED PASSAGES AND A CENTRAL PASSAGE FOR COMMUNICATING WITH THE WELL STRING THEREABOVE WHEREBY FLUID MAY BE CONDUCTED FROM THE WELL STRING TO SAID CENTRAL PASSAGE AND TO SAID RADIALLY SPACED PASSAGES, A VALVE MEMBER IN SAID BODY TO SELECTIVELY COMMUNICATE SAID RADIALLY SPACED PASSAGES AND SAID CENTRAL PASSAGE WITH THE WELL STRING WHEREBY FLUID MAY BE CONDUCTED SELECTIVELY TO SAID CENTRAL PASSAGE AND TO SAID RADIALLY SPACED PASSAGES, SAID VALVE MEMBER INITIALLY POSITIONED TO CLOSE OFF FLUID FLOW TO SAID RADIALLY SPACED PASSAGE AND TO COMMUNICATE SAID CENTRAL PASSAGE WITH THE WELL STRING WHEREBY FLUID MAY BE CIRCULATED INTO SAID BODY, SAID VALVE MEMBER BEING ADAPTED TO RECEIVE A BALL MEMBER DROPPED IN THE WELL STRING TO CLOSE OFF FLOW THROUGH SAID CENTRAL PASSAGE AND BUILD UP FLUID PRESSURE ON SAID
Claim 2
Dependent Claim
176 words
A WELL TOOL FOR SECURING TO A WELL STRING TO BE LOWERED INTO A WELL BORE TO RECOVER OBJECTS THEREIN INCLUDING, AN ENLONGATED HOLLOW BODY OPEN AT ITS UPPER AND LOWER ENDS, A FITTING IN SAID BODY, SAID FITTING HAVING A PLURALITY OF RADIALLY SPACED PASSAGES AND A CENTRAL PASSAGE FOR COMMUNICATING WITH THE WELL STRING THEREABOVE WHEREBY FLUID MAY BE CONDUCTED FROM THE WELL STRING TO SAID CENTRAL PASSAGE AND TO SAID RADIALLY SPACED PASSAGES, A VALVE MEMBER IN SAID BODY TO SELECTIVELY COMMUNICATE SAID RADIALLY SPACED PASSAGES AND SAID CENTRAL PASSAGE WITH THE WELL STRING WHEREBY FLUID MAY BE CONDUCTED SELECTIVELY TO SAID CENTRAL PASSAGE AND TO SAID RADIALLY SPACED PASSAGES, SAID VALVE MEMBER INITIALLY POSITIONED TO CLOSE OFF FLUID FLOW TO SAID RADIALLY SPACED PASSAGE AND TO COMMUNICATE SAID CENTRAL PASSAGE WITH THE WELL STRING WHEREBY FLUID MAY BE CIRCULATED INTO SAID BODY, SAID VALVE MEMBER BEING ADAPTED TO RECEIVE A BALL MEMBER DROPPED IN THE WELL STRING TO CLOSE OFF FLOW THROUGH SAID CENTRAL PASSAGE AND BUILD UP FLUID PRESSURE ON SAID
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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) | 1967-02-10 | 1967-08-12 | 1968-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-10 | 1971-08-12 | 1972-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-10 | 1975-08-12 | 1976-02-11 | $7700.00 | Window Closed / Lapsed |