Patent US3086876A successfully refreshed from Google Patents.
US3086876A
Expired / Lapsed
US
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Refractory composition and process of making same
Assignee: Carb-Rite Co
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Filing: 1960-12-05
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Granted: 1963-04-23
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Expires: 1980-12-05
Abstract
No abstract record available.
Inventors
- 👤 Griggs John Oliver
- 👤 William L Ross
- 👤 Alan R Fraser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:28
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A REFRACTORY COMPOSITION CONSISTING ESSENTIALLY OF AN INTIMATE MIXTURE OF THE FOLLOWING MATERIALS IN FINELY DIVIDED PARTICLE SIZE IN PERCENTAGES BY WEIGHT: PERCENT ALUMINUM 2-8 IRON OXIDE 6-15 A HALIDE FLUX FORMING MATERIAL 0.5-3 DOLOMITE (CALCINED) 10-25 MAGNESITE (CALCINED) 50-80
Claim 2
Dependent Claim
40 words
A REFRACTORY COMPOSITION CONSISTING ESSENTIALLY OF AN INTIMATE MIXTURE OF THE FOLLOWING MATERIALS IN FINELY DIVIDED PARTICLE SIZE IN PERCENTAGES BY WEIGHT: PERCENT ALUMINUM 2-8 IRON OXIDE 6-15 A HALIDE FLUX FORMING MATERIAL 0.5-3 DOLOMITE (CALCINED) 10-25 MAGNESITE (CALCINED) 50-80
References Cited (Backward Citations)
US2253955A
Cited
US1934263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |