Patent US2990439A successfully refreshed from Google Patents.
US2990439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermocouples
Assignee: The General Electric Company PLC
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Filing: 1957-12-16
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Granted: 1961-06-27
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Expires: 1977-12-16
Abstract
No abstract record available.
Inventors
- 👤 Goldsmid Hiroshi Julian
- 👤 Sheard Anthony Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:30
CPC Classifications
H; H10; H10N; H10N10/00; H10N10/80; H10N10/85; H10N10/851; H10N10/852
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A THERMOCOUPLE IN WHICH AT LEAST ONE ELEMENT CONSISTS ESSENTIALLY OF A SEMICONDUCTOR HAVING A CONSTITUTIONAL FORMULA BIMSBNTEPSEQSR (WHERE N HAS A VALUE IN THE RANGE 0-1.8, Q HAS A VALUE IN THE RANGE 0-0.4 AND R HAS A VALUE IN THE RANGE 0-0.24, SUBJECT TO THE CONDITIONS THAT M+N=2, P+Q+R=3,3N+2Q+2R IS NOT LESS THAN 0.03, AND 3Q+5R IS NOT GREATER THAN 1.2), THE SEMICONDUCTOR HAVING A CRYSTAL STRUCTURE SIMILAR TO THAT OF BISMUTH TELLURIDE AND EACH CRYSTAL OF THE SEMICONDUCTOR IN THE ELEMENT BEING ORIENTATED WITH ITS PRINCIPAL CRYSTAL AXIS SUBSTANTIALLY PERPENDICULAR TO THE DIRECTION OF THE LENGTH OF THE ELEMENT BETWEEN THE JUNCTIONS OF THE THERMOCOUPLE.
Claim 2
Dependent Claim
108 words
A THERMOCOUPLE IN WHICH AT LEAST ONE ELEMENT CONSISTS ESSENTIALLY OF A SEMICONDUCTOR HAVING A CONSTITUTIONAL FORMULA BIMSBNTEPSEQSR (WHERE N HAS A VALUE IN THE RANGE 0-1.8, Q HAS A VALUE IN THE RANGE 0-0.4 AND R HAS A VALUE IN THE RANGE 0-0.24, SUBJECT TO THE CONDITIONS THAT M+N=2, P+Q+R=3,3N+2Q+2R IS NOT LESS THAN 0.03, AND 3Q+5R IS NOT GREATER THAN 1.2), THE SEMICONDUCTOR HAVING A CRYSTAL STRUCTURE SIMILAR TO THAT OF BISMUTH TELLURIDE AND EACH CRYSTAL OF THE SEMICONDUCTOR IN THE ELEMENT BEING ORIENTATED WITH ITS PRINCIPAL CRYSTAL AXIS SUBSTANTIALLY PERPENDICULAR TO THE DIRECTION OF THE LENGTH OF THE ELEMENT BETWEEN THE JUNCTIONS OF THE THERMOCOUPLE.
References Cited (Backward Citations)
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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) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |