Patent US3780425A successfully refreshed from Google Patents.
US3780425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoelectric units
Assignee: United Kingdom Atomic Energy Authority
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Filing: 1971-01-25
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Granted: 1973-12-25
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Expires: 1991-01-25
Abstract
Abstract In a thermoelectric unit comprising a plurality of thermoelectric elements, accurate spacing between adjacent elements is achieved by use of a cellular insulating material between adjacent thermoelectric elements and applying pressure during setting of the bonding medium so that the bonding medium occupies the pores of the cellular material.
Inventors
- 👤 A Penn
- 👤 F Neighbour
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:37
CPC Classifications
F; F25; F25B; F25B21/00; F25B21/02; H; H10; H10N; H10N10/00; H10N10/01; Y; Y10; Y10S; Y10S257/00; Y10S257/93
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
15 words
The method of claim 1 wherein the thermoelectric elements comprise bismuth telluride based semiconductor material.
Claim 2
Dependent Claim
26 words
The method of claim 1 wherein the grain size of the material comprising the thermoelectric elements is less than the cross sectional dimensions of the elements.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein the paper used is cigarette paper.
Claim 4
Dependent Claim
20 words
The method of claim 1 wherein the electrically insulating cellular material is paper and the bonding medium is epoxy resin.
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |