US3251028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Geophone
Assignee: Mandrel Industries Inc
•
Filing: 1963-08-08
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Granted: 1966-05-10
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Expires: 1983-08-08
Abstract
No abstract record available.
Inventors
- 👤 Samuel E Haggard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:51
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/16; G01V1/18; G01V1/181
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN A GEOPHONE, THE COMBINATION COMPRISING (A) A HOUSING, (B) A CAP MEMBER REMOVABLY SECUREC ATOP SAID HOUSING, (C) A PERMANENT MAGNET SECURED WITHIN SAID HOUSING, (D) A COIL ASSEMBLY SUSPENDED WITHIN SAID HOUSING FOR RELATIVE MOVEMENT WITHIN THE MAGNETIC FIELD OF SAID MAGNET, SAID COIL ASSEMBLY COMPRISING A COIL OF ELECTRICALLY CONDUCTIVE WIRE AND A DUAL ELEMENT SPRING SECURED ATOP SAID COIL, SAID DUAL ELEMENT BEING OF ELECTRICALLY CONDUCTIVE MATERIAL AND EACH ELECTRICALLY CONNECTED TO AN END OF SAID COIL, AND (E) A PAIR OF TERMINAL ELEMENTS OF ELECTRICALLY CONDUCTIVE MATERIAL, EACH SECURING ONE OF SAID DUAL ELEMENTS BELOW SAID CAP, AND EXTENDING THERETHROUGH TO PROVIDE A JUNCTION POINT ON THE OUTER SIDE THEREOF.
Claim 2
Dependent Claim
115 words
IN A GEOPHONE, THE COMBINATION COMPRISING (A) A HOUSING, (B) A CAP MEMBER REMOVABLY SECUREC ATOP SAID HOUSING, (C) A PERMANENT MAGNET SECURED WITHIN SAID HOUSING, (D) A COIL ASSEMBLY SUSPENDED WITHIN SAID HOUSING FOR RELATIVE MOVEMENT WITHIN THE MAGNETIC FIELD OF SAID MAGNET, SAID COIL ASSEMBLY COMPRISING A COIL OF ELECTRICALLY CONDUCTIVE WIRE AND A DUAL ELEMENT SPRING SECURED ATOP SAID COIL, SAID DUAL ELEMENT BEING OF ELECTRICALLY CONDUCTIVE MATERIAL AND EACH ELECTRICALLY CONNECTED TO AN END OF SAID COIL, AND (E) A PAIR OF TERMINAL ELEMENTS OF ELECTRICALLY CONDUCTIVE MATERIAL, EACH SECURING ONE OF SAID DUAL ELEMENTS BELOW SAID CAP, AND EXTENDING THERETHROUGH TO PROVIDE A JUNCTION POINT ON THE OUTER SIDE THEREOF.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |