US2823982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of finely divided metal oxides
Assignee: Fabriques de Produits Chimiques de Thann et de Mulhouse
•
Filing: 1949-02-11
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Granted: 1958-02-18
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Expires: 1969-02-11
Abstract
No abstract record available.
Inventors
- 👤 Saladin Otto
- 👤 Frey Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:46
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/18; C01B33/181; C01B33/183; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/07; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C01P2004/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
THE METHOD OF PRODUCING A FINELY DIVIDED OXIDE OF A METALLIC ELEMENT FROM THOSE IN GROUPS 3 AND 4 OF THE PERIODIC SYSTEM THAT FORM VOLATILE CHLORIDES, WHICH COMPRISES CONTINUOUSLY BURNING A MIXTURE OF A VAPORIZED ANHYDROUS CHLORIDE OF SAID ELEMENT AND OXYGEN CONTAINING GAS IN A STREAMING FLAME THEREOF WITHIN AN ENVELOPING FLAME FORMED FROM A SURROUNDING COMBUSTIBLE GAS STREAM HAVING A SUBSTANTIALLY HIGHER FLAME TEMPERATURE THAN SAID MIXTURE.
Claim 2
Independent Claim
70 words
THE METHOD OF PRODUCING A FINELY DIVIDED OXIDE OF A METALLIC ELEMENT FROM THOSE IN GROUPS 3 AND 4 OF THE PERIODIC SYSTEM THAT FORM VOLATILE CHLORIDES, WHICH COMPRISES CONTINUOUSLY BURNING A MIXTURE OF A VAPORIZED ANHYDROUS CHLORIDE OF SAID ELEMENT AND OXYGEN CONTAINING GAS IN A STREAMING FLAME THEREOF WITHIN AN ENVELOPING FLAME FORMED FROM A SURROUNDING COMBUSTIBLE GAS STREAM HAVING A SUBSTANTIALLY HIGHER FLAME TEMPERATURE THAN SAID MIXTURE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |