Patent US3374371A successfully refreshed from Google Patents.
US3374371A
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US
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Method and heat exchanger for preheating the combustion air of magnetohydrodynamic generators
Assignee: Siemens AG
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Filing: 1965-05-03
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Granted: 1968-03-19
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Expires: 1985-05-03
Abstract
No abstract record available.
Inventors
- 👤 Hanlein Walter
- 👤 Rieger Wilhelm
- 👤 Maier Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:54
CPC Classifications
H; H02; H02K; H02K44/00; H02K44/08; F; F27; F27B; F27B7/00; F27B7/20; F27B7/34; F28; F28C; F28C3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3185457A
Cited
US3223860A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |