Patent US3202519A successfully refreshed from Google Patents.
US3202519A
Expired / Lapsed
US
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Carbon-mineral refractory
Assignee: Union Oil Company of California
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Filing: 1961-10-09
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Granted: 1965-08-24
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Expires: 1981-10-09
Abstract
No abstract record available.
Inventors
- 👤 Carleton B Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:14
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/22; C23C16/26; C04; C04B; C04B35/00; C04B35/515; C04B35/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A REFRACTORY COMPOSITION HAVING A HIGH DEGREE OF THERMAL AND MECHANICAL SHOCK RESISTANCE CONSISTING ESSENTIALLY OF A MATRIX OF METAL OXIDE POWDERS CEMENTED TOGETHER SUBSTANTIALLY ENTIRELY BY VITREOUS CARBON DEPOSITED FROM A HYDROCARBON V APOR AT 900* TO 1150*C., SAID REFRACTORY COMPRISING FROM 5 TO ABOUT 75 WEIGHT PERCENT OF SAID VITREOUS CARBON AND BEING FREE OF VITREOUS CERAMIC BONDS.
Claim 2
Dependent Claim
60 words
A REFRACTORY COMPOSITION HAVING A HIGH DEGREE OF THERMAL AND MECHANICAL SHOCK RESISTANCE CONSISTING ESSENTIALLY OF A MATRIX OF METAL OXIDE POWDERS CEMENTED TOGETHER SUBSTANTIALLY ENTIRELY BY VITREOUS CARBON DEPOSITED FROM A HYDROCARBON V APOR AT 900* TO 1150*C., SAID REFRACTORY COMPRISING FROM 5 TO ABOUT 75 WEIGHT PERCENT OF SAID VITREOUS CARBON AND BEING FREE OF VITREOUS CERAMIC BONDS.
References Cited (Backward Citations)
US2487581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |