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US3011983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory and method of making the same
Assignee: Alcoa Corp
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Filing: 1959-03-16
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Granted: 1961-12-05
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Expires: 1979-03-16
Abstract
No abstract record available.
Inventors
- 👤 Richard W Ricker
- 👤 Paul F Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:06
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/58007; C04B35/58014; C04B35/58021; C01; C01B; C01B21/00; C01B21/06; C04B35/622; C04B35/626; C04B35/63; C04B35/6303; C04B35/64; C04B35/645
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A REFRACTORY COMPOSITION CONSISTING ESSENTIALLY OF 70 TO 85% BY WEIGHT TITANIUM CYANONITRIDE AND 15 TO 30% BY WEIGHT ALUMINUM NITRIDE CHARACTERIZED BY A LOW ELECTRICAL RESISTIVITY OF FROM APPROXIMATELY 100 TO 500X10-*6 OHM INCHES, AND BY SUBSTANTIALLY CHEMICAL INERTNESS TO MOLTEN CRYOLITE AND MOLTEN ALUMINUM METAL.
Claim 2
Dependent Claim
47 words
A REFRACTORY COMPOSITION CONSISTING ESSENTIALLY OF 70 TO 85% BY WEIGHT TITANIUM CYANONITRIDE AND 15 TO 30% BY WEIGHT ALUMINUM NITRIDE CHARACTERIZED BY A LOW ELECTRICAL RESISTIVITY OF FROM APPROXIMATELY 100 TO 500X10-*6 OHM INCHES, AND BY SUBSTANTIALLY CHEMICAL INERTNESS TO MOLTEN CRYOLITE AND MOLTEN ALUMINUM 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) | 1964-12-04 | 1965-06-05 | 1965-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-04 | 1969-06-05 | 1969-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-04 | 1973-06-05 | 1973-12-05 | $7700.00 | Window Closed / Lapsed |