US3011982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory and method of making the same
Assignee: Alcoa Corp
•
Filing: 1959-02-04
•
Granted: 1961-12-05
•
Expires: 1979-02-04
Abstract
No abstract record available.
Inventors
- 👤 Eugene A Maduk
- 👤 Richard W Ricker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:58
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/581
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A REFRACTORY COMPOSITION CONSISTING ESSENTIALLY OF 35 TO 50% BY WEIGHT TITANIUM CYANONITRIDE AND 50 TO 65% BY WEIGHT ALUMINUM NITRIDE CHARACTERIZED BY A LOW ELECTRICAL RESISTIVITY OF FROM APPROXIMATELY 250 TO 5000X10-*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 35 TO 50% BY WEIGHT TITANIUM CYANONITRIDE AND 50 TO 65% BY WEIGHT ALUMINUM NITRIDE CHARACTERIZED BY A LOW ELECTRICAL RESISTIVITY OF FROM APPROXIMATELY 250 TO 5000X10-*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 |