US2820727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of metallizing ceramic bodies
Assignee: General Electric Co
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Filing: 1956-05-22
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Granted: 1958-01-21
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Expires: 1976-05-22
Abstract
No abstract record available.
Inventors
- 👤 Grattidge Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:56
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/52; C04B41/80; C04B41/81; C04B41/89; H; H01; H01B; H01B1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
THE METHOD OF FORMING A METAL SURFACE ON A REFRACTORY BODY HAVING A HIGH ALUMINA CONTENT WHICH COMPRISES APPLYING TO SAID BODY ONE OR MORE LAYERS CONSISTING ESSENTIALLY OF A MIXTURE OF ALUMINA AND AN OXIDE SELECTED FROM THE GROUP CONSISTING OF FE2O3 ND CR2O3, THE ALUMINNA CONSISTING FROM 30% TO 90% BY WEIGHT OF THE MIXTURE AND THEN APPLYING A LAYER OF METAL SELECTED FROM THE GROUP CONSISTING OF PLATINUM AND IRIDUM AND HEATING THE COATED BODY IN AN OXYGEN CONTAINING ATMOSPHERE TO A TEMPERATURE FROM 1200*C. TO 1600*C. FOR PLATINUM AND FROM 1200*C. TO 1750*C. FOR IRIDIUM TO CAUSE SAID OXIDE-ALUMINA COATING TO REACT WITH SAID BODY AND FROM A BOND BETWEEN SAID BODY AND THE APPLIED LAYER OF METAL.
Claim 2
Independent Claim
122 words
THE METHOD OF FORMING A METAL SURFACE ON A REFRACTORY BODY HAVING A HIGH ALUMINA CONTENT WHICH COMPRISES APPLYING TO SAID BODY ONE OR MORE LAYERS CONSISTING ESSENTIALLY OF A MIXTURE OF ALUMINA AND AN OXIDE SELECTED FROM THE GROUP CONSISTING OF FE2O3 ND CR2O3, THE ALUMINNA CONSISTING FROM 30% TO 90% BY WEIGHT OF THE MIXTURE AND THEN APPLYING A LAYER OF METAL SELECTED FROM THE GROUP CONSISTING OF PLATINUM AND IRIDUM AND HEATING THE COATED BODY IN AN OXYGEN CONTAINING ATMOSPHERE TO A TEMPERATURE FROM 1200*C. TO 1600*C. FOR PLATINUM AND FROM 1200*C. TO 1750*C. FOR IRIDIUM TO CAUSE SAID OXIDE-ALUMINA COATING TO REACT WITH SAID BODY AND FROM A BOND BETWEEN SAID BODY AND THE APPLIED LAYER OF METAL.
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) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |