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Patent US3157748A successfully refreshed from Google Patents.
US3157748A
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Magnetic transducer
Assignee: General Electric Co
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Filing: 1961-03-24
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Granted: 1964-11-17
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Expires: 1981-03-24
Abstract
No abstract record available.
Inventors
- 👤 Kenneth R Eldredge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:20
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/187; G11B5/23; G11B5/235; G06; G06K; G06K7/00; G06K7/08; G06K7/082; G06K7/083; G06K7/084; G11B5/17; G11B5/29; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/4906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A MAGNETIC TRANSDUCER FOR PRODUCING SIGNALS IN RESPONSE TO MOVEMENT OF MAGNETIZED PORTIONS OF A MAGNETIC MEDIUM ADJACENT THERETO COMPRISING; FIRST AND SECOND JUXTAPOSED CORE MEMBERS FORMED OF MAGNETIC MATERIAL AND HAVING ABUTTING INNER SURFACES AND PORTIONS ADAPTED TO FORM POLE TIPS; A FIRST GROOVE IN THE INNER SURFACE ALONG THE POLE TIP OF SAID FIRST CORE MEMBER TO FORM
Claim 2
Dependent Claim
60 words
A MAGNETIC TRANSDUCER FOR PRODUCING SIGNALS IN RESPONSE TO MOVEMENT OF MAGNETIZED PORTIONS OF A MAGNETIC MEDIUM ADJACENT THERETO COMPRISING; FIRST AND SECOND JUXTAPOSED CORE MEMBERS FORMED OF MAGNETIC MATERIAL AND HAVING ABUTTING INNER SURFACES AND PORTIONS ADAPTED TO FORM POLE TIPS; A FIRST GROOVE IN THE INNER SURFACE ALONG THE POLE TIP OF SAID FIRST CORE MEMBER TO FORM
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) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |