US3217305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass bonded ferrite magnetic head
Assignee: Individual
•
Filing: 1962-07-19
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Granted: 1965-11-09
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Expires: 1982-07-19
Abstract
No abstract record available.
Inventors
- 👤 James S Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:42
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/187
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A GLASS BONDED FERRITE MAGNETIC RECORDING AND REPRODUCING HEAD, COMPRISING: A PLURALITY OF CIRCUIT PARTS OF FERRITE MATERIAL, ONE OF SAID PARTS BEING PROVIDED WITH A MATING SURFACE FOR ULTIMATE FUSION WITH THE MATING SURFACE OF ANOTHER ONE OF SAID PLURALITY OF PARTS, AT LEAST ONE OF SAID MATING SURFACES HAVING AT LEAST ONE RECESS THEREIN, THERE BEING AN EFFECTIVE GAP BETWEEN SAID TWO SURFACES, SAID GAP AND AT LEAST A PORTION OF SAID RECESS BEING FILLED WITH A GLASS MATERIAL MECHANICALLY JOINING AND BONDING SAID TWO MATING SURFACES.
Claim 2
Dependent Claim
89 words
A GLASS BONDED FERRITE MAGNETIC RECORDING AND REPRODUCING HEAD, COMPRISING: A PLURALITY OF CIRCUIT PARTS OF FERRITE MATERIAL, ONE OF SAID PARTS BEING PROVIDED WITH A MATING SURFACE FOR ULTIMATE FUSION WITH THE MATING SURFACE OF ANOTHER ONE OF SAID PLURALITY OF PARTS, AT LEAST ONE OF SAID MATING SURFACES HAVING AT LEAST ONE RECESS THEREIN, THERE BEING AN EFFECTIVE GAP BETWEEN SAID TWO SURFACES, SAID GAP AND AT LEAST A PORTION OF SAID RECESS BEING FILLED WITH A GLASS MATERIAL MECHANICALLY JOINING AND BONDING SAID TWO MATING SURFACES.
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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |