US3531330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoelectric assemblies
Assignee: Individual
•
Filing: 1966-10-27
•
Granted: 1970-09-29
•
Expires: 1986-10-27
Abstract
No abstract record available.
Inventors
- 👤 Thore M Elfving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:47
CPC Classifications
F; F25; F25B; F25B21/00; F25B21/02; H; H10; H10N; H10N10/00; H10N10/10; H10N10/13; H10N10/80; H10N10/81; H10N10/813; F25B2321/00; F25B2321/02; F25B2321/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1848655A
Cited
US775188A
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US3004393A
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US3111432A
Cited
US3234048A
Cited
GB971957A
Cited
US3390018A
Cited
US3196620A
Cited
US3194024A
Cited
US3273347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |