Patent US2889499A successfully refreshed from Google Patents.
US2889499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bistable semiconductor device
Assignee: International Business Machines Corp
•
Filing: 1954-09-27
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Granted: 1959-06-02
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Expires: 1974-09-27
Abstract
No abstract record available.
Inventors
- 👤 Richard F Rutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:20
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/35; H03F; H03F99/00; H10; H10D; H10D10/00; H10D48/00; H10D48/30; H10D48/32; H10D48/34; H10D48/345; H10D62/00; H10D62/10; H10D99/00; H10F; H10F99/00; H10W; H10W72/00; H10W72/20; H10W72/071; H10W72/075; H10W72/07551; H10W72/07554
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
109 words
A SEMICONDUCTOR CIRCUIT ELEMENT COMPRISING A SEMICONDUCTOR BODY INCLUDING A FIRST ZONE OF ONE TYPE CONDUCTIVITY AND A SECOND ZONE OF OPPOSITE TYPE CONDUCTIVITY SEPARATED BY A BARRIER, SAID FIRST ZONE HAVING AN ASSOCIATED MEANS FOR MAINTAINING AN ESSENTIALLY UNIFORM POTENTIAL THROUGHOUT SAID FIRST ZONE, SAID SECOND ZONE HAVING A DIMENTION FROM SAID BARRIER TO A SURFACE PARALLEL TO SAID BARRIER THAT IS NEAR THE DIFFUSION DISTANCE FOR THE AVERAGE LIFETIME OF SEMICONDUCTOR CARRIERS IN SAID SEMICONDUCTOR BODY, AN ELECTROFORMED POINT CONTACT CURRENT AMPLIFYING COLLECTOR LOCATED ON THE SURFACE OF SAID SECOND ZONE PARALLEL TO SAID BARRIER AND AN OHMIC CONNECTION TO SAID SECOND ZONE REMOTE FROM SAID COLLECTOR.
Claim 2
Dependent Claim
42 words
THE CIRCUIT ELEMENT OF CLAIM 4 WHEREIN SAID MEANS FOR MAINTAINING AN ESSENTIALLY UNIFORM POTENTIAL IN SAID FIRST ZONE COMPRISES A SMALL THICKNESS DIMENSION IN SAID FIRST ZONE COMBINED WITH A COATING OF SOLDER OVER, SUBSTANTIALLY ALL OF THE EXPOSED SURFACE THEREOF.
Claim 3
Dependent Claim
28 words
THE CIRCUIT ELEMENT OF CLAIM 4 WHEREIN SAID FIRST ZONE IS OF P CONDUCTIVITY TYPE SEMICONDUCTOR MATERIAL AND SAID SECOND ZONE IS OF N CONDUCTIVITY TYPE SIMICONDUCTOR MATERIAL.
References Cited (Backward Citations)
US2524033A
Cited
US2666814A
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US2570978A
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US2597028A
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US2561411A
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US2691736A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |