US3164682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic transducer
Assignee: IIT Research Institute
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Filing: 1959-08-20
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Granted: 1965-01-05
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Expires: 1979-08-20
Abstract
No abstract record available.
Inventors
- 👤 Marvin E Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:25
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/49; G11B5/4907; G11B5/4969
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A MULTICHANNEL HIGH FREQUENCY MAGNETIC HEAD ASSEMBLY COMPRISING: FIRST, SECOND AND THIRD MAGNETIC CORE STRUCTURES, SAID FIRST CORE STRUCTURE COMPRISING A MEMBER HAVING UPPER AND LOWER PORTIONS, THE LOWER PORTION OF SAID FIRST CORE STRUCTURE DEFINING A SOLID CONTINUOUS BODY OF MAGNETIC MATERIAL, THE UPPER PORTION OF SAID FIRST CORE STRUCTURE DEFINING A PLURALITY OF SPACED MEMBERS OF MAGNETIC MATERIAL INTEGRAL WITH SAID FIRST LOWER CORE PORTION, AN INDIVIDUAL BIAS WINDING SEPARATELY WOUND ON EACH OF THE SPACED MEMBERS OF THE UPPER PORTION OF SAID FIRST CORE STRUCTURE, SAID SECOND CORE STRUCTURE DEFINING A SOLID BODY OF MAGNETIC MATERIAL HAVING CONTINUOUS UPPER AND LOWER SURFACES, A SIGNAL TRANSLATING COIL WOUND ON SAID SECOND CORE, SAID THIRD CORE STRUCTURE COMPRISING A MEMBER HAVING UPPPER AND LOWER PORTIONS, THE LOWER PORTION OF THIRD CORE STRUCTURE DEFINING A SOLID CONTINUOUS BODY OF MAGNETIC MATERIAL, THE UPPER PORTION OF SAID THIRD CORE STRUCTURE DEFINING A PLURALITY OF SPACED MEMBERS OF MAG-
Claim 2
Dependent Claim
157 words
A MULTICHANNEL HIGH FREQUENCY MAGNETIC HEAD ASSEMBLY COMPRISING: FIRST, SECOND AND THIRD MAGNETIC CORE STRUCTURES, SAID FIRST CORE STRUCTURE COMPRISING A MEMBER HAVING UPPER AND LOWER PORTIONS, THE LOWER PORTION OF SAID FIRST CORE STRUCTURE DEFINING A SOLID CONTINUOUS BODY OF MAGNETIC MATERIAL, THE UPPER PORTION OF SAID FIRST CORE STRUCTURE DEFINING A PLURALITY OF SPACED MEMBERS OF MAGNETIC MATERIAL INTEGRAL WITH SAID FIRST LOWER CORE PORTION, AN INDIVIDUAL BIAS WINDING SEPARATELY WOUND ON EACH OF THE SPACED MEMBERS OF THE UPPER PORTION OF SAID FIRST CORE STRUCTURE, SAID SECOND CORE STRUCTURE DEFINING A SOLID BODY OF MAGNETIC MATERIAL HAVING CONTINUOUS UPPER AND LOWER SURFACES, A SIGNAL TRANSLATING COIL WOUND ON SAID SECOND CORE, SAID THIRD CORE STRUCTURE COMPRISING A MEMBER HAVING UPPPER AND LOWER PORTIONS, THE LOWER PORTION OF THIRD CORE STRUCTURE DEFINING A SOLID CONTINUOUS BODY OF MAGNETIC MATERIAL, THE UPPER PORTION OF SAID THIRD CORE STRUCTURE DEFINING A PLURALITY OF SPACED MEMBERS OF MAG-
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) | 1968-01-05 | 1968-07-06 | 1969-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-05 | 1972-07-06 | 1973-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-05 | 1976-07-06 | 1977-01-05 | $7700.00 | Window Closed / Lapsed |