US2792539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor construction
Assignee: Sprague Electric Co
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Filing: 1953-07-07
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Granted: 1957-05-14
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Expires: 1973-07-07
Abstract
No abstract record available.
Inventors
- 👤 Lehovec Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:40
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/30; H10D48/32; H10D48/34; H10D48/345; H10D10/00; H10D62/00; H10D62/10; H10D99/00; H10W; H10W76/00; H10W76/01; H10W76/05; H10W76/40; H10W76/42; H10W76/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A TRANSISTOR COMPRISING A BODY OF SEMI-CONDUCTIVE MATERIAL PROVIDED WITH P AND N CONDUCTIVITY TYPE REGIONS JOINING EACH OTHER IN A JUNCTION LAYER, LOW RESISTANCE ELECTRODES ATTACHED TO SAID P AN N REGIOS, A DEPRESSION POSITIONED IN ONE OF SAID REGIONS EXTENDING TOWARDS SAID JUNCTION LAYER, AND A WIRE PROBE PROJECTIGN INTO SAID DEPRESSION AND MAKING A POINT ELECTRICAL CONTACT WITH SAID SEMI-D CONDUCTIVE MATERIAL ADJACENT TO SAID JUNCTION LAYER.
Claim 2
Dependent Claim
70 words
A TRANSISTOR COMPRISING A BODY OF SEMI-CONDUCTIVE MATERIAL PROVIDED WITH P AND N CONDUCTIVITY TYPE REGIONS JOINING EACH OTHER IN A JUNCTION LAYER, LOW RESISTANCE ELECTRODES ATTACHED TO SAID P AN N REGIOS, A DEPRESSION POSITIONED IN ONE OF SAID REGIONS EXTENDING TOWARDS SAID JUNCTION LAYER, AND A WIRE PROBE PROJECTIGN INTO SAID DEPRESSION AND MAKING A POINT ELECTRICAL CONTACT WITH SAID SEMI-D CONDUCTIVE MATERIAL ADJACENT TO SAID JUNCTION LAYER.
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) | 1960-05-13 | 1960-11-12 | 1961-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-13 | 1964-11-12 | 1965-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-13 | 1968-11-12 | 1969-05-14 | $7700.00 | Window Closed / Lapsed |