US2959504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductive current limiters
Assignee: AT&T Inc
•
Filing: 1958-05-26
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Granted: 1960-11-08
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Expires: 1978-05-26
Abstract
No abstract record available.
Inventors
- 👤 Ian Munro Ross
- 👤 Friedolf Michael Smits
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:59
CPC Classifications
H; H02; H02H; H02H9/00; H02H9/02; H01; H01B; H01B1/00; H01B1/04; H10; H10D; H10D18/00; H10D62/00; H10D62/10; H10D62/124; H10D62/125; H10D62/80; H10D62/83; H10D62/834; H10D8/00; H10D8/80; H10D84/00; H10D84/101; H10D84/131; H10D84/138; H10D88/00; H10D99/00; H10P; H10P95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A SEMICONDUCTIVE DEVICE COMPRISING A SEMICONDUCTIVE WAFER INCLUDING A SUCCESSION OF AT LEAST FOUR ZONES, CONTIGUOUS ZONES OF THE SUCCESSION BEING OF OPPOSITE CONDUCTIVITY TYPE, AND ELECTRODE CONNECTIONS TO THE TWO END ZONES OF THE SUCCESSION, CHARACTERIZED IN THAT ONE OF THE INTERMEDIATE ZONES OF THE SUCESSION HAS A FIRST REGION WHICH HAS A THICKNESS AT LEAST SEVERAL DIFFUSION LENGTHS OF MINORITY CARRIERS OF LESS THAN A DIFFUSION LENGTH OF MINORITY A THICKNESS OF LESS THAN A DIFFUSION LENGTH OF MINORITY CARRIERS THEREIN, AND THE END ZONE SPACED FROM SAID ONE INTERMEDIATE ZONE EXTENDS PRIMARILY OPPOSITE THE FIRST REGION OF SAID ONE INTERMEDIATE ZONE.
Claim 2
Dependent Claim
104 words
A SEMICONDUCTIVE DEVICE COMPRISING A SEMICONDUCTIVE WAFER INCLUDING A SUCCESSION OF AT LEAST FOUR ZONES, CONTIGUOUS ZONES OF THE SUCCESSION BEING OF OPPOSITE CONDUCTIVITY TYPE, AND ELECTRODE CONNECTIONS TO THE TWO END ZONES OF THE SUCCESSION, CHARACTERIZED IN THAT ONE OF THE INTERMEDIATE ZONES OF THE SUCESSION HAS A FIRST REGION WHICH HAS A THICKNESS AT LEAST SEVERAL DIFFUSION LENGTHS OF MINORITY CARRIERS OF LESS THAN A DIFFUSION LENGTH OF MINORITY A THICKNESS OF LESS THAN A DIFFUSION LENGTH OF MINORITY CARRIERS THEREIN, AND THE END ZONE SPACED FROM SAID ONE INTERMEDIATE ZONE EXTENDS PRIMARILY OPPOSITE THE FIRST REGION OF SAID ONE INTERMEDIATE ZONE.
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) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |