Patent US3135696A successfully refreshed from Google Patents.
US3135696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of aluminum oxide and carbon based briquettes
Assignee: Pechiney SA
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Filing: 1960-09-01
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Granted: 1964-06-02
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Expires: 1980-09-01
Abstract
No abstract record available.
Inventors
- 👤 Ruelle Louis
- 👤 Clair Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:35
CPC Classifications
C; C22; C22B; C22B21/00; C22B21/0007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A PROCESS FOR THE PREPARATION OF BRIQUETTES CONSISTING ESSENTIALLY OF ALUMINUM OXIDE AND CARBON PRESENT IN SUBSTANTIALLY STOICHIOMETRIC RATIO FOR REDUCING THE ALUMINUM OXIDE WITH CARBON COMPRISING COMBINING ALUMINUM OXIDE AND CARBON HAVING A GRAIN SIZE OF NOT MORE THAN ABOUT 150 MICRONS IN INTIMATE MIXTURE, INTRODUCING AN AQUEOUS ALKALINE SOLUTION OF AN ALKALINE MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL HYDROXIDE AND ALKALI METAL ALUMINATE IN AMOUNTS OF FROM 3 TO 30% BY WEIGHT BASED UPON THE AMOUNT OF DRY SOLIDS TO FORM A DRY PASTE AS DISTINGUISHED FROM A WET SLURRY, GRANULATING THE PASTE, AND THEN DRYING THE GRANULES AT A TEMPERATURE WITHIN THE RANGE OF AMBIENT TEMPERATURE UP TO ABOUT 200*C. TO FORM POROUS BRIQUETTES OF HIGH STRENGTH.
Claim 2
Dependent Claim
123 words
A PROCESS FOR THE PREPARATION OF BRIQUETTES CONSISTING ESSENTIALLY OF ALUMINUM OXIDE AND CARBON PRESENT IN SUBSTANTIALLY STOICHIOMETRIC RATIO FOR REDUCING THE ALUMINUM OXIDE WITH CARBON COMPRISING COMBINING ALUMINUM OXIDE AND CARBON HAVING A GRAIN SIZE OF NOT MORE THAN ABOUT 150 MICRONS IN INTIMATE MIXTURE, INTRODUCING AN AQUEOUS ALKALINE SOLUTION OF AN ALKALINE MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL HYDROXIDE AND ALKALI METAL ALUMINATE IN AMOUNTS OF FROM 3 TO 30% BY WEIGHT BASED UPON THE AMOUNT OF DRY SOLIDS TO FORM A DRY PASTE AS DISTINGUISHED FROM A WET SLURRY, GRANULATING THE PASTE, AND THEN DRYING THE GRANULES AT A TEMPERATURE WITHIN THE RANGE OF AMBIENT TEMPERATURE UP TO ABOUT 200*C. TO FORM POROUS BRIQUETTES OF HIGH STRENGTH.
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) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |