US3079267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light weight castable refractories
Assignee: Johns Manville Corp
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Filing: 1959-12-03
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Granted: 1963-02-26
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Expires: 1979-12-03
Abstract
No abstract record available.
Inventors
- 👤 Howard E Konrad
- 👤 William L Stafford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:21
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A LIGHTWEIGHT, HIGH TEMPERATURE CASTABLE REFRACTORY CONTAINING ESSENTIALLY APPROXIMATELY 30 TO 60% BY WEIGHT OF HYDRAULIC SETTING CEMENT, APPROXIMATELU 10 TO 35% BY WEIGHT OF NODULATED MINERAL WOOD AND APPROXIMATELY 30 TO 50% BY WEIGHT OF REFRACTORY MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALUMINOUS MATERIAL, SILICEOUS MATERIAL AND MIXTURES THEREOF, SAID CONSTITUENTS BEING COMPOSED AND PROPORTIONED TO PROVIDE HYDRAULIC SETTING REFRACTORY CONCRETE THE FIRED PRODUCTS OF WHICH HAVE A DENSITY NO GREATER THAN ABOUT 50 POUNDS PER CUBIC FOOT AND COMPRISE AT LEAST 90% BY WEIGHT OF ALUMINA, SILICA AND CALCIUM OXIDE WITHIN THE RATIOS OF THE AREA DEFINED BY THE LINE A OF THE TRIAXIAL DRIAGRAM OF FIG. 1 OF THE DRAWING.
Claim 2
Dependent Claim
114 words
A LIGHTWEIGHT, HIGH TEMPERATURE CASTABLE REFRACTORY CONTAINING ESSENTIALLY APPROXIMATELY 30 TO 60% BY WEIGHT OF HYDRAULIC SETTING CEMENT, APPROXIMATELU 10 TO 35% BY WEIGHT OF NODULATED MINERAL WOOD AND APPROXIMATELY 30 TO 50% BY WEIGHT OF REFRACTORY MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALUMINOUS MATERIAL, SILICEOUS MATERIAL AND MIXTURES THEREOF, SAID CONSTITUENTS BEING COMPOSED AND PROPORTIONED TO PROVIDE HYDRAULIC SETTING REFRACTORY CONCRETE THE FIRED PRODUCTS OF WHICH HAVE A DENSITY NO GREATER THAN ABOUT 50 POUNDS PER CUBIC FOOT AND COMPRISE AT LEAST 90% BY WEIGHT OF ALUMINA, SILICA AND CALCIUM OXIDE WITHIN THE RATIOS OF THE AREA DEFINED BY THE LINE A OF THE TRIAXIAL DRIAGRAM OF FIG. 1 OF THE DRAWING.
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) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |