US3128390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetoresistive logical circuitry
Assignee: International Business Machines Corp
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Filing: 1962-02-28
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Granted: 1964-04-07
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Expires: 1982-02-28
Abstract
No abstract record available.
Inventors
- 👤 Pettus Charles
- 👤 Young Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:40
CPC Classifications
H; H03; H03K; H03K23/00; H03K23/76; H03K19/00; H03K19/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A LOGICAL CIRCUIT INCLUDING A MAGNETORESISTIVE LOGIC UNIT, SAID MAGNETORESISTIVE LOGIC UNIT COMPRISING A THIN FILM FERROMAGNETIC ELEMENT POSSESSING MAGNETORESISTIVE PROPERTIES, CURRENT INPUT MEANS CONNECTED ACROSS SAID FERROMAGNETIC ELEMENT AND ADAPTED TO BE COUPLED TO A CURRENT SOURCE TO ESTABLISH A CURRENT FLOW THROUGH SAID ELEMENT, VOLTAGE TAP OUTPUT MEANS CONNECTED ACROSS SAID FERROMAGNETIC ELEMENT AT POINTS SPACED ALONG THE DIRECTION OF CURRENT FLOW,
Claim 2
Dependent Claim
64 words
A LOGICAL CIRCUIT INCLUDING A MAGNETORESISTIVE LOGIC UNIT, SAID MAGNETORESISTIVE LOGIC UNIT COMPRISING A THIN FILM FERROMAGNETIC ELEMENT POSSESSING MAGNETORESISTIVE PROPERTIES, CURRENT INPUT MEANS CONNECTED ACROSS SAID FERROMAGNETIC ELEMENT AND ADAPTED TO BE COUPLED TO A CURRENT SOURCE TO ESTABLISH A CURRENT FLOW THROUGH SAID ELEMENT, VOLTAGE TAP OUTPUT MEANS CONNECTED ACROSS SAID FERROMAGNETIC ELEMENT AT POINTS SPACED ALONG THE DIRECTION OF CURRENT FLOW,
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) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |