US2896005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoelectric heat pump
Assignee: 3M Co
•
Filing: 1955-06-01
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Granted: 1959-07-21
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Expires: 1975-06-01
Abstract
No abstract record available.
Inventors
- 👤 Robert W Fritts
- 👤 Karrer Sebastian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:20
CPC Classifications
H; H10; H10N; H10N10/00; H10N10/80; H10N10/85; H10N10/851; H10N10/852; C; C22; C22C; C22C11/00; F; F25; F25B; F25B21/00; F25B21/02; F25B2321/00; F25B2321/02; F25B2321/021; F25B2321/0212
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
82 words
A COLD PRODUCING THERMOELEMENT COMPRISONG TWO CIRCUIT MEMBERS OF DIFFERENT RESPECTIVE MATERIALS, A HEAT ABSORBING ELEMENTS HAVING GOOD HEAT CONDUCTIVITY AND SLIGHT THERMOELETRIC POWERS CONDUCTIVELY JOINED INTERMEDIATE SAID MEMBERS TO FORM TOGETHER THERWITH A THERMOELECTRIC JUNCTION, AT LEAST ONE OF SAID TWO MEMBERS CONSISTING OF A BINARY COMPOUND OF TWO MATALS OF A SLIGHTLY IMPERFECT COMPOSITION DEPARTING FROM PERFECT STOICHIOMETRY BY AN AMOUNT OF AT MOST 2 PERCENT BY WEIGHT OF THE TOTAL MATERIAL OF SAID MEMBER, AND HAVING SEMICONDUCTORLIKE ELECTRIC CONDUCTANCE.
References Cited (Backward Citations)
US2811440A
Cited
US2811571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-20 | 1963-01-19 | 1963-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-20 | 1967-01-19 | 1967-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-20 | 1971-01-19 | 1971-07-21 | $7700.00 | Window Closed / Lapsed |