Patent US2912341A successfully refreshed from Google Patents.
US2912341A
Expired / Lapsed
US
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Castable refractory
Assignee: Alcoa Corp
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Filing: 1954-12-21
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Granted: 1959-11-10
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Expires: 1974-12-21
Abstract
No abstract record available.
Inventors
- 👤 Richard W Ricker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:15
CPC Classifications
C; C04; C04B; C04B22/00; C04B22/08; C04B22/10; C04B28/00; C04B28/02; C04B28/06; C04B2111/00; C04B2111/00431
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A CASTABLE REFRACTORY MIX COMPRISING AS THE ESSENTIAL COMPONENTS THEREOF CALCIUM ALUMINATE CEMENT, A REFRACTORY AGGRAEGATE, AND AT LEAST ONE ALKALINE EARTH METAL CARBONATE, THE ALKALINE EARTH METAL CARBONATE CONTENT OF THE SAID MIX BEING EQUAL TO FROM 0.25 TO 2.25% OF THE CALCIUM ALUMINATE CEMENT CONTENT BY WEIGHT.
Claim 2
Dependent Claim
49 words
A CASTABLE REFRACTORY MIX COMPRISING AS THE ESSENTIAL COMPONENTS THEREOF CALCIUM ALUMINATE CEMENT, A REFRACTORY AGGRAEGATE, AND AT LEAST ONE ALKALINE EARTH METAL CARBONATE, THE ALKALINE EARTH METAL CARBONATE CONTENT OF THE SAID MIX BEING EQUAL TO FROM 0.25 TO 2.25% OF THE CALCIUM ALUMINATE CEMENT CONTENT BY WEIGHT.
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) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |