US2948631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory lime
Assignee: Individual
•
Filing: 1957-06-06
•
Granted: 1960-08-09
•
Expires: 1977-06-06
Abstract
No abstract record available.
Inventors
- 👤 Robert W Mcallister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:13
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/03; C04B35/057
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
REFRACTORY COMPOSITION CONSISTING ESSENTIALLY OF FROM ABOUT 65% TO 85% HIGH-CALCIUM LIME AND FROM ABOUT 35% TO 15% OF A MIXTURE OF ALUMINA AND SILICA BY TOTAL WEIGHT OF SAID COMPOSITION, SAID ALUMINA AND SILICA MIXTURE CONTAINING BETWEEN FROM ABOUT 35% TO 60% BY WEIGHT OF ALUMINA, AND SAID HIGH-CALCIUM LIME CONTAINING FROM ABOUT 2% TO 5% MAGNESIA.
Claim 2
Dependent Claim
58 words
REFRACTORY COMPOSITION CONSISTING ESSENTIALLY OF FROM ABOUT 65% TO 85% HIGH-CALCIUM LIME AND FROM ABOUT 35% TO 15% OF A MIXTURE OF ALUMINA AND SILICA BY TOTAL WEIGHT OF SAID COMPOSITION, SAID ALUMINA AND SILICA MIXTURE CONTAINING BETWEEN FROM ABOUT 35% TO 60% BY WEIGHT OF ALUMINA, AND SAID HIGH-CALCIUM LIME CONTAINING FROM ABOUT 2% TO 5% MAGNESIA.
References Cited (Backward Citations)
US1251535A
Cited
US1238020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |