US2610110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing finely crystalline aluminum oxide
Assignee: Individual
•
Filing: 1949-04-28
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Granted: 1952-09-09
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Expires: 1969-04-28
Abstract
No abstract record available.
Inventors
- 👤 Eliasson Bror
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:03
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C09; C09K; C09K3/00; C09K3/14; C09K3/1409
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
METHOD OF PRODUCING FINELY CRYSTALLINE ALUMINUM OXIDE WHICH COMPRISE ADDING TO A FINELY PULVERIZED BASE MATERIAL CONSISTING OF SUBSTANTIALLY ALKALI-FREE HYDRATED ALUMINUM OXIDE AN ADDITIVE SELECTED FROM A GROUP CONSISTING OF PHOSPHORIC ACID, PHOSPHORUS PENTOXIDE AND AMMONIUM PHOSPHATES, PULVERIZING THE MIXTURE AND CALCINING THE MIXTURE AT A TEMPERATURE OF FROM 1000*-1300* C. FOR A PERIOD FROM ONE TO FIVE HOURS.
Claim 2
Dependent Claim
60 words
METHOD OF PRODUCING FINELY CRYSTALLINE ALUMINUM OXIDE WHICH COMPRISE ADDING TO A FINELY PULVERIZED BASE MATERIAL CONSISTING OF SUBSTANTIALLY ALKALI-FREE HYDRATED ALUMINUM OXIDE AN ADDITIVE SELECTED FROM A GROUP CONSISTING OF PHOSPHORIC ACID, PHOSPHORUS PENTOXIDE AND AMMONIUM PHOSPHATES, PULVERIZING THE MIXTURE AND CALCINING THE MIXTURE AT A TEMPERATURE OF FROM 1000*-1300* C. FOR A PERIOD FROM ONE TO FIVE HOURS.
References Cited (Backward Citations)
US1949038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-09 | 1956-03-10 | 1956-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-09 | 1960-03-10 | 1960-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-09 | 1964-03-10 | 1964-09-09 | $7700.00 | Window Closed / Lapsed |