US3267443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic memory element
Assignee: International Business Machines Corp
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Filing: 1962-07-24
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Granted: 1966-08-16
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Expires: 1982-07-24
Abstract
No abstract record available.
Inventors
- 👤 James M Brownlow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:30
CPC Classifications
H; H01; H01F; H01F10/00; H01F10/08; H01F10/10; H01F10/18; H01F10/20; H01F10/26; H01F10/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A MAGNETIC MEMORY ELEMENT COMPRISING: A SUBSTRATE; A BODY OF FERRITE MATERIAL BONDED TO SAID SUBSTRATE; SAID BODY OF FERRITE MATERIAL BEING FORMED OF PARTICLES OF FERRITE MATERIAL SINTERED TOGETHER; SAID BODY HAVING A FIRST SECTION AND A SECOND SECTION SAID FIRST SECTION OF SAID FERRITE BODY CONTACTING SAID SUBSTRATE AND BONDING SAID BODY TO SAID SUBSTRATE; SAID SECOND SECTION BEING SEPARATED FROM SAID SUBTRATE BY SAID FIRST SECTION; SAID FIRST SECTION HAVING A PARTICLE DENSITY MUCH LESS THAN THE PARTICLE DENSITY IN SAID SECOND SECTION WITH SPACES BETWEEN THE PARTICLES TO FORM BONDING CONNECTIONS TO SAID SUBSTRATE ONLY AT SPACED POINTS ALONG SAID SUBSTRATE.
Claim 2
Dependent Claim
105 words
A MAGNETIC MEMORY ELEMENT COMPRISING: A SUBSTRATE; A BODY OF FERRITE MATERIAL BONDED TO SAID SUBSTRATE; SAID BODY OF FERRITE MATERIAL BEING FORMED OF PARTICLES OF FERRITE MATERIAL SINTERED TOGETHER; SAID BODY HAVING A FIRST SECTION AND A SECOND SECTION SAID FIRST SECTION OF SAID FERRITE BODY CONTACTING SAID SUBSTRATE AND BONDING SAID BODY TO SAID SUBSTRATE; SAID SECOND SECTION BEING SEPARATED FROM SAID SUBTRATE BY SAID FIRST SECTION; SAID FIRST SECTION HAVING A PARTICLE DENSITY MUCH LESS THAN THE PARTICLE DENSITY IN SAID SECOND SECTION WITH SPACES BETWEEN THE PARTICLES TO FORM BONDING CONNECTIONS TO SAID SUBSTRATE ONLY AT SPACED POINTS ALONG SAID SUBSTRATE.
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) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |