US3208878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoelectric devices
Assignee: Franklin Institute
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Filing: 1962-12-26
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Granted: 1965-09-28
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Expires: 1982-12-26
Abstract
No abstract record available.
Inventors
- 👤 Francis J Donahoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:05
CPC Classifications
H; H10; H10N; H10N10/00; H10N10/80; H10N10/85; H10N10/851; H10N10/852
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A QUATERNARY, SEMICONDUCTIVE COMPOSITION, THE LATTICE ARRAY OF WHICH COMPRISES THE CATIONIC ELEMENTS BISMUTH AN ANTIOMONY AND THE ANIONIC ELEMENTS TELLURIUM AND SELENIUM, IN SUBSTANTIALLY STOICHIOMETRIC PROPORTIONS OF TWO ATOMS OF CATIONIC ELEMENT AND THREE ATOMS OF ANIONIC ELEMENT AND HAVING THE FORMULA.
Claim 2
Dependent Claim
43 words
A QUATERNARY, SEMICONDUCTIVE COMPOSITION, THE LATTICE ARRAY OF WHICH COMPRISES THE CATIONIC ELEMENTS BISMUTH AN ANTIOMONY AND THE ANIONIC ELEMENTS TELLURIUM AND SELENIUM, IN SUBSTANTIALLY STOICHIOMETRIC PROPORTIONS OF TWO ATOMS OF CATIONIC ELEMENT AND THREE ATOMS OF ANIONIC ELEMENT AND HAVING THE FORMULA.
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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |