US2876122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calcium oxide articles and method of making the same
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1953-08-26
•
Granted: 1959-03-03
•
Expires: 1973-08-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Osgood J Whittemore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:12
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/03; C04B35/057; Y; Y10; Y10S; Y10S264/00; Y10S264/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A REFRACTORY ARTICLE HAVING A LIQUIDUS POINT OF AT LEAST 2400*C. AND BEING A SHAPED PIECE OF RELATIVELY DENSE CHARACTERISTICS FORMED BY COMPACTING AND SINTERING FUSED LIME (CAO) PARTICLES CONTAINING NOT MORE THAN 20% FUSED MAGNESIA, NOT MORE THAN 3% FUSED SILICA, NOT MORE THAN 2% OF OXIDE OTHER THAN ONE-HALF OF ONE PERCENT AND SILICA, AND NOT MORE THAN ONE-HALF OF ONE PERCENT OF MATERIAL OTHER THAN OXIDE, THE SINTERED FUSED LIME BEING CRYSTALLINE MATERIAL THE PARTICLES OF WHICH ARE PREDOMINANTLY MONOCRYSTALLINE EXPOSING A RELATIVELY LOW AREA FOR HYDRATION, THE ENTIRE CONTENT OF THE ARTICLE OTHER THAN SAID MAGNESIUM, SILICA, OTHER OXIDE AND OTHER MATERIAL BEING LIME CAO, THE ARTICLE BEING RELATIVELY STABLE IN STORAGE AND USE.
Claim 2
Dependent Claim
118 words
A REFRACTORY ARTICLE HAVING A LIQUIDUS POINT OF AT LEAST 2400*C. AND BEING A SHAPED PIECE OF RELATIVELY DENSE CHARACTERISTICS FORMED BY COMPACTING AND SINTERING FUSED LIME (CAO) PARTICLES CONTAINING NOT MORE THAN 20% FUSED MAGNESIA, NOT MORE THAN 3% FUSED SILICA, NOT MORE THAN 2% OF OXIDE OTHER THAN ONE-HALF OF ONE PERCENT AND SILICA, AND NOT MORE THAN ONE-HALF OF ONE PERCENT OF MATERIAL OTHER THAN OXIDE, THE SINTERED FUSED LIME BEING CRYSTALLINE MATERIAL THE PARTICLES OF WHICH ARE PREDOMINANTLY MONOCRYSTALLINE EXPOSING A RELATIVELY LOW AREA FOR HYDRATION, THE ENTIRE CONTENT OF THE ARTICLE OTHER THAN SAID MAGNESIUM, SILICA, OTHER OXIDE AND OTHER MATERIAL BEING LIME CAO, THE ARTICLE BEING RELATIVELY STABLE IN STORAGE AND USE.
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) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |