US2874027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of alkali metal phosphates
Assignee: International Minerals and Chemical Corp
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Filing: 1956-05-07
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Granted: 1959-02-17
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Expires: 1976-05-07
Abstract
No abstract record available.
Inventors
- 👤 Gunter H Gloss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:04
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/38; C01B25/39; C01B25/395
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
THE METHOD OF PREPARING A GLASSY ALKALI METAL POLYMETAPHOSPHATE WHICH COMPRISES PREPARING A SOLUTION OF AN ALKALI METAL CHLORIDE AND PHOSPHORIC ACID, SAID SOLUTION HAVING AN ALKALI METAL TO PHOSPHORUS MOL RATIO OF BETWEEN ABOUT 0.6 AND ABOUT 1.0, SPRAYING THE SOLUTION IN DROPLET FORM INTO A FLAME HAVING A TEMPERATURE BETWEEN ABOUT 2500* F. AND ABOUT 4500* F. TO PRODUCE A SOLID GLASSY ALKALI METAL POLYMETAPHOSPHATE AND SEPARATELY COLLECTING THE GAS PHASE WHICH CONTAINS GASEOUS HYDROCHLORIC ACID.
Claim 2
Independent Claim
78 words
THE METHOD OF PREPARING A GLASSY ALKALI METAL POLYMETAPHOSPHATE WHICH COMPRISES PREPARING A SOLUTION OF AN ALKALI METAL CHLORIDE AND PHOSPHORIC ACID, SAID SOLUTION HAVING AN ALKALI METAL TO PHOSPHORUS MOL RATIO OF BETWEEN ABOUT 0.6 AND ABOUT 1.0, SPRAYING THE SOLUTION IN DROPLET FORM INTO A FLAME HAVING A TEMPERATURE BETWEEN ABOUT 2500* F. AND ABOUT 4500* F. TO PRODUCE A SOLID GLASSY ALKALI METAL POLYMETAPHOSPHATE AND SEPARATELY COLLECTING THE GAS PHASE WHICH CONTAINS GASEOUS HYDROCHLORIC ACID.
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) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |