Patent US3574142A successfully refreshed from Google Patents.
US3574142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic material for magnetohydrodynamic generator electrode
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
•
Filing: 1969-01-24
•
Granted: 1971-04-06
•
Expires: 1989-01-24
Abstract
Abstract CONDUCTIVE CERAMIC MATERIAL WHICH IS INTENDED FOR THE FABRICATION OF MHD GENERATOR ELECTRODES AND AFFORDS RESISTANCE TO THE CORROSIVE ACTION OF THE ALKALINE SEED IS THE GAS WHICH PASSES THROUGH THE GENERATOR DUCT. SAID CERAMIC MATERIAL CONSISTS MAINLY OF AN ALKALINE-EARTH ZIRCONATE CONTAINING AN ADDITIVE WHICH IS SELECTED FROM CHROMIUM OXIDE AND ALUMINA.
Inventors
- 👤 David Yerouchalmi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:42
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/48; C04B35/486; C04B35/03; C04B35/04; C04B35/053; H; H01; H01B; H01B1/00; H01B1/06; H01B1/08; H02; H02K; H02K44/00; H02K44/08; H02K44/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |