Patent US3277415A successfully refreshed from Google Patents.
US3277415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic retriever
Assignee: Individual
•
Filing: 1964-07-02
•
Granted: 1966-10-04
•
Expires: 1984-07-02
Abstract
No abstract record available.
Inventors
- 👤 Spodig Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:06
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/02; H01F7/0231; H01F7/0252; H01F7/0257
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
205 words
A DEVICE ATTACHABLE TO MOTION PRODUCING MEAN FOR MAGNETICALLY RETRIEVING MAGNETIC OBJECTS FROM A BORE, PARTICULARLY FROM AN OIL WELL, COMPRISING, IN COMBINATION, HEAD BODY MEANS HAVING A LONGITUDIANL AXIS INCLUDING ATTACHMENT MEANS AT THE REAR END THEREOF FOR ATTACHING SAID BODY MEANS TO THE MOTION PRODUCING MEANS AND INCLUDING RECEPTACLE MEANS AT THE FRONT END THEREOF; PERMANENT MAGNET MEANS MOUNTED IN SAID RECEPTACLE MEANS AND COMPRISING AT LEAST ONE PAIR OF PERMANENT MAGNETS ORIENTED WITH THEIR MAGNETIC AXES TRANSVERSELY OF SAID LONGITUDINAL AXIS, EACH OF SAID MAGNETS HAVING AN INWARDLY FACING POLE FACE AND AN OUTWARDLY FACING POLE FACE, SAID INWARDLY FACING POLE FACES OF SAID MAGNETS, RESPECTIVELY BEING SPACED FROM SAID LONGITUDINAL AXIS AND ALSO DIAMETRICALLY FROM EACH OTHER, SAID INWARDLY FACING DIAMETRICALLY OPPOSITE POLE FACES OF SAID PAIR OF PERMANENT MAGNETS HAVING DIFFERENT POLARITIES; AND A PLURALITY OF POLE SHOE MEANS MOUNTED IN ENGAGEMENT AT LEAST WIH SAID INWARDLY FACING POLE FACES OF SAID MAGNETS, RESPECTIVELY, AND SPACED FROM EACH OTHER IN DIRECTION TRANSVERSE OF SAID LONGITUDINAL AXIS, SAID POLE SHOE MEANS EXTENDING AN AXIAL DIRECTION OF SAID BODY MEANS TO THE FRONT FACE THE ENTIRE DEVICE AND FORMING BETWEEN THEMSELVES A MAGNETIC GAP EXTENDING TO THE OPENING IN SAID FRONT FACE.
Claim 2
Independent Claim
205 words
A DEVICE ATTACHABLE TO MOTION PRODUCING MEAN FOR MAGNETICALLY RETRIEVING MAGNETIC OBJECTS FROM A BORE, PARTICULARLY FROM AN OIL WELL, COMPRISING, IN COMBINATION, HEAD BODY MEANS HAVING A LONGITUDIANL AXIS INCLUDING ATTACHMENT MEANS AT THE REAR END THEREOF FOR ATTACHING SAID BODY MEANS TO THE MOTION PRODUCING MEANS AND INCLUDING RECEPTACLE MEANS AT THE FRONT END THEREOF; PERMANENT MAGNET MEANS MOUNTED IN SAID RECEPTACLE MEANS AND COMPRISING AT LEAST ONE PAIR OF PERMANENT MAGNETS ORIENTED WITH THEIR MAGNETIC AXES TRANSVERSELY OF SAID LONGITUDINAL AXIS, EACH OF SAID MAGNETS HAVING AN INWARDLY FACING POLE FACE AND AN OUTWARDLY FACING POLE FACE, SAID INWARDLY FACING POLE FACES OF SAID MAGNETS, RESPECTIVELY BEING SPACED FROM SAID LONGITUDINAL AXIS AND ALSO DIAMETRICALLY FROM EACH OTHER, SAID INWARDLY FACING DIAMETRICALLY OPPOSITE POLE FACES OF SAID PAIR OF PERMANENT MAGNETS HAVING DIFFERENT POLARITIES; AND A PLURALITY OF POLE SHOE MEANS MOUNTED IN ENGAGEMENT AT LEAST WIH SAID INWARDLY FACING POLE FACES OF SAID MAGNETS, RESPECTIVELY, AND SPACED FROM EACH OTHER IN DIRECTION TRANSVERSE OF SAID LONGITUDINAL AXIS, SAID POLE SHOE MEANS EXTENDING AN AXIAL DIRECTION OF SAID BODY MEANS TO THE FRONT FACE THE ENTIRE DEVICE AND FORMING BETWEEN THEMSELVES A MAGNETIC GAP EXTENDING TO THE OPENING IN SAID FRONT FACE.
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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |