Patent US3220860A successfully refreshed from Google Patents.
US3220860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic materials
Assignee: Fulmer Research Institute Ltd
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Filing: 1962-08-01
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Granted: 1965-11-30
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Expires: 1982-08-01
Abstract
No abstract record available.
Inventors
- 👤 Robiette Alfred Gordon Evans
- 👤 Brandes Eric Adolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:43
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/64; C04B35/65
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
A PROCESS OF FORMING A GRANULAR REFRACTORY CERAMIC MATERIAL INTO A RIGID MASS OF PREDETERMINED SHAPE WHICH COMPRISES MIXING SAID GRANULAR REFRACTORY MATERIAL SELECTED FROM THE GROUP CONSISTING OF CALCINED MAGNESITE, CALCINED DOLOMITE, ALUMINA, SILICON CARBIDE, AND MAGNESIA WITH A POWDERED METAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND MAGNESIUM, AND AN INORGANIC OXIDIZING COMPOUND SELECTED FROM THE GROUP CONSISTING OF CALCIUM CHROMATE, POTASSIUM DICHROMATE AND CHROMIC ANHYDRIDE, SAID REFRACTORY MATERIAL BEING PRESENT IN THE RANGE OF FROM 60 TO 97 1/2% BY WEIGHT, SAID POWDERED METAL BEING PRESENT IN THE RANGE OF FROM 1/2 TO 10% BY WEIGHT, SAID INORGANIC OXIDIZING COMPOUND OF CHROMIUM BEING PRESENT IN THE RANGE OF FROM 2 TO 30% BY WEIGHT, COMPACTING SAID MIXTURE IN SAID PREDETERMINED SHAPE AND HEATING SAID COMPACTED MIXTURE TO A TEMPERATURE AT WHICH SAID METAL REACTS WITH SAID INORGANIC OXIDIZING COMPOUND OF CHROMIUM LIBERATING HEAT AND CAUSING SAID MIXTURE TO CONSOLIDATE INTO SAID RIGID MASS OF PREDETERMINED SHAPE.
Claim 2
Dependent Claim
160 words
A PROCESS OF FORMING A GRANULAR REFRACTORY CERAMIC MATERIAL INTO A RIGID MASS OF PREDETERMINED SHAPE WHICH COMPRISES MIXING SAID GRANULAR REFRACTORY MATERIAL SELECTED FROM THE GROUP CONSISTING OF CALCINED MAGNESITE, CALCINED DOLOMITE, ALUMINA, SILICON CARBIDE, AND MAGNESIA WITH A POWDERED METAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND MAGNESIUM, AND AN INORGANIC OXIDIZING COMPOUND SELECTED FROM THE GROUP CONSISTING OF CALCIUM CHROMATE, POTASSIUM DICHROMATE AND CHROMIC ANHYDRIDE, SAID REFRACTORY MATERIAL BEING PRESENT IN THE RANGE OF FROM 60 TO 97 1/2% BY WEIGHT, SAID POWDERED METAL BEING PRESENT IN THE RANGE OF FROM 1/2 TO 10% BY WEIGHT, SAID INORGANIC OXIDIZING COMPOUND OF CHROMIUM BEING PRESENT IN THE RANGE OF FROM 2 TO 30% BY WEIGHT, COMPACTING SAID MIXTURE IN SAID PREDETERMINED SHAPE AND HEATING SAID COMPACTED MIXTURE TO A TEMPERATURE AT WHICH SAID METAL REACTS WITH SAID INORGANIC OXIDIZING COMPOUND OF CHROMIUM LIBERATING HEAT AND CAUSING SAID MIXTURE TO CONSOLIDATE INTO SAID RIGID MASS OF PREDETERMINED SHAPE.
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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |