US3556843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallized ceramic and method and composition therefor
Assignee: Coors Porcelain Co
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Filing: 1968-05-23
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Granted: 1971-01-19
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Expires: 1988-05-23
Abstract
Abstract SINTERED BERYLLIUM OXIDE BASE CERAMIC IS METALLIZED BY APPLYING THERETO A LAYER OF A MIXTURE OF ABOUT 70 TO 85% BY WEIGHT TUNGSTEN POWDER AND ABOUT 15 TO 30% BY WEIGHT YTTRIUM OXIDE POWDER AND THEN HEATING TO A TEMPERATURE SUFFICIENT TO SINTER TO TUNGSTEN POWDER AND CAUSE THE YTTRIUM OXIDE TO REACT WITH THE BERYLLIUM OXIDE TO FORM A LIQUID PHASE WHICH PENETRATES AND FILLS THE INTERSTICES OF THE SINTERED TUNGSTEN TO PROVIDE A STRONGLY BONDED METALLIZED SURFACE ON THE BERYLLIUM OXIDE CERAMIC TO WHICH OTHER METALS MAY THEN BE EASILY BONDED FOR FORMING ELECTRICAL CONNECTIONS OR TO FORM A SEALED STRUCTURE.
Inventors
- 👤 Robert W Buck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:18
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/51; C04B41/5133; C04B41/80; C04B41/81; C04B41/85; C04B41/88; H; H01; H01B; H01B1/00; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |