Patent US2684913A successfully refreshed from Google Patents.
US2684913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractories and bonding agents therefor
Assignee: North American Cement Corp
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Filing: 1951-01-06
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Granted: 1954-07-27
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Expires: 1971-01-06
Abstract
No abstract record available.
Inventors
- 👤 Richard R West
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:18
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A HEAT STABLE HYDRAULIC BONDING COMPOSITION COMPRISING A CALCIUM SILICATE CEMENT STABILIZED BY A CARBON MATERIAL PRESENT IN A QUANTITY BY WEIGHT VARYING FROM ABOUT 0.4 TO 20% OF SAID CEMENT, AND BY A QUANTITY OF A SUBSTANTIALLY WATER-INSOLUBLE BORON-CONTAINING SUBSTANCES PRESENT IN A QUANTITY DELIVERING B2O3 IN AN AMOUNT BY WEIGHT EQUAL TO AT LEAST 0.02% OF SAID CEMENT BUT DELIVERING B2O3 IN A QUANTITY INSUFFICIENT TO FORM A VITREOUS BOND WITH REFRACTORY AGGREGATES.
Claim 2
Dependent Claim
75 words
A HEAT STABLE HYDRAULIC BONDING COMPOSITION COMPRISING A CALCIUM SILICATE CEMENT STABILIZED BY A CARBON MATERIAL PRESENT IN A QUANTITY BY WEIGHT VARYING FROM ABOUT 0.4 TO 20% OF SAID CEMENT, AND BY A QUANTITY OF A SUBSTANTIALLY WATER-INSOLUBLE BORON-CONTAINING SUBSTANCES PRESENT IN A QUANTITY DELIVERING B2O3 IN AN AMOUNT BY WEIGHT EQUAL TO AT LEAST 0.02% OF SAID CEMENT BUT DELIVERING B2O3 IN A QUANTITY INSUFFICIENT TO FORM A VITREOUS BOND WITH REFRACTORY AGGREGATES.
References Cited (Backward Citations)
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GB189404632A
Cited
CH10792A
Cited
GB190204298A
Cited
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-26 | 1958-01-25 | 1958-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-26 | 1962-01-25 | 1962-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-26 | 1966-01-25 | 1966-07-27 | $7700.00 | Window Closed / Lapsed |