US2801901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making aluminum oxide from hydrated aluminum
Assignee: Godfrey L Cabot Inc
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Filing: 1953-03-23
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Granted: 1957-08-06
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Expires: 1973-03-23
Abstract
No abstract record available.
Inventors
- 👤 Robert W Dingman
- 👤 Laurent P Michel
- 👤 Robert N Secord
- 👤 William D Schaeffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:17
CPC Classifications
B; B82; B82Y; B82Y30/00; C; C01; C01F; C01F7/00; C01F7/02; C01F7/30; C01F7/302; C01F7/304; C01P; C01P2004/00; C01P2004/60; C01P2004/64; C01P2006/00; C01P2006/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
THE METHOD OF PRODUCING FINELY DIVIDED ALUMINUM OXIDE COMPRISING SUSPENDING SOLID PARTICLES OF A HYDRATED ALUMINUM SALT IN A CARRIER GAS, INTRODUCING THE SUSPENSION AXIALLY INTO A HEAT INSULATED ELONGATED CIRCULARLY CYLINDRICAL REACTION CHAMBER AND SIMULTANEOUSLY INTRODUCING INTO SAID REACTION CHAMBER A COMBUSTIBLE GAS AND A FREE OXYGEN-CONTAINING GAS, AT LEAST ONE OF SAID GASES BEING INTRODUCED TANGENTIALLY AGAINST THE WALL OF SAID CHAMBER TO CREATE A CYCLONIC TURBULENT REACTION ZONE, THE OXYGEN-CONTAINING GAS BEING IN AN AMOUNT AT LEAST SUFFICIENT TO BURN THE COMBUSTIBLE GAS AND TO CONVERT THE ALUMINUM SALT TO THE OXIDE, BURING SAID COMBUSTIBLE GAS TO MAINTAIN A TEMPERATURE WHITHIN THE REACTION CHAMBER SUFFICIENT TO CONVERT THE ALUMUNUM SALT TO ALUMINUM OXIDE, AND RECOVERING THE ALUMINUM OXIDE FROM THE GASEOUS REACTION PRODUCTS.
Claim 2
Independent Claim
126 words
THE METHOD OF PRODUCING FINELY DIVIDED ALUMINUM OXIDE COMPRISING SUSPENDING SOLID PARTICLES OF A HYDRATED ALUMINUM SALT IN A CARRIER GAS, INTRODUCING THE SUSPENSION AXIALLY INTO A HEAT INSULATED ELONGATED CIRCULARLY CYLINDRICAL REACTION CHAMBER AND SIMULTANEOUSLY INTRODUCING INTO SAID REACTION CHAMBER A COMBUSTIBLE GAS AND A FREE OXYGEN-CONTAINING GAS, AT LEAST ONE OF SAID GASES BEING INTRODUCED TANGENTIALLY AGAINST THE WALL OF SAID CHAMBER TO CREATE A CYCLONIC TURBULENT REACTION ZONE, THE OXYGEN-CONTAINING GAS BEING IN AN AMOUNT AT LEAST SUFFICIENT TO BURN THE COMBUSTIBLE GAS AND TO CONVERT THE ALUMINUM SALT TO THE OXIDE, BURING SAID COMBUSTIBLE GAS TO MAINTAIN A TEMPERATURE WHITHIN THE REACTION CHAMBER SUFFICIENT TO CONVERT THE ALUMUNUM SALT TO ALUMINUM OXIDE, AND RECOVERING THE ALUMINUM OXIDE FROM THE GASEOUS REACTION PRODUCTS.
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) | 1960-08-05 | 1961-02-04 | 1961-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-05 | 1965-02-04 | 1965-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-05 | 1969-02-04 | 1969-08-06 | $7700.00 | Window Closed / Lapsed |