US3210154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molecularly dehydrated phosphates
Assignee: Stauffer Chemical Co
•
Filing: 1962-03-07
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Granted: 1965-10-05
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Expires: 1982-03-07
Abstract
No abstract record available.
Inventors
- 👤 George I Klein
- 👤 Leo B Post
- 👤 Ralph E Newby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:27
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/38; C01B25/40; C01B25/41; C01B25/412; C01B25/42; C01B25/425
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
A PROCESS FOR PRODUCING A MOLECULARLY DEHYDRATED PHOSPHATE SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL PYROPHOSPHATE, ALKALI METAL POLYPHOSPHATE AND MIXTURES THEREOF, WHICH COMPRISES PREPARING A FINELY DIVIDED DRY FEED CONSISTING ESSENTIALLY OF ALKALI METAL ORTHOPHOSPHATES SAID FEED HAVING SUBSTANTIALLY THE SAME RATIO OF ALKALI METAL TO PHOSPHORUS AS THE MOLECULARLY DEHYDRATED PHOSPHATE TO BE PRODUCED, FEEDING SAID DRY FEED TO A PREESTABLISHED FLUIDIZED BED OF PARTICLES OF MOLECULARLY DEHYDRATED PHOSPHATE HAVING AT ALL TIMES SUBSTANTIALLY THE SAME COMPOSITION AS THE PRODUCT TO BE PRODUCED, MAINTAINING A FEED RATE AND BED TEMPERATURE WHICH WILL PREVENT LOSS OF FLUIDIZATION DUE TO EXCESSIVE AGGLOMERATION WITHIN THE FLUIDIZED BED SAID TEMPERATURE BEING IN THE RANGE BETWEEN 200*C. AND 620*C., AND WITHDRAWING MOLECULARLY DEHYDRATED PHOSPHATE PRODUCT FROM THE FLUIDIZED BED AT A RATE APPROXIMATELY EQUAL TO THE RATE AT WHICH ALKALI METAL AND PHOSPHORUS COMPONENTS ENTER THE FLUIDIZED BED IN THE FEED.
Claim 2
Dependent Claim
149 words
A PROCESS FOR PRODUCING A MOLECULARLY DEHYDRATED PHOSPHATE SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL PYROPHOSPHATE, ALKALI METAL POLYPHOSPHATE AND MIXTURES THEREOF, WHICH COMPRISES PREPARING A FINELY DIVIDED DRY FEED CONSISTING ESSENTIALLY OF ALKALI METAL ORTHOPHOSPHATES SAID FEED HAVING SUBSTANTIALLY THE SAME RATIO OF ALKALI METAL TO PHOSPHORUS AS THE MOLECULARLY DEHYDRATED PHOSPHATE TO BE PRODUCED, FEEDING SAID DRY FEED TO A PREESTABLISHED FLUIDIZED BED OF PARTICLES OF MOLECULARLY DEHYDRATED PHOSPHATE HAVING AT ALL TIMES SUBSTANTIALLY THE SAME COMPOSITION AS THE PRODUCT TO BE PRODUCED, MAINTAINING A FEED RATE AND BED TEMPERATURE WHICH WILL PREVENT LOSS OF FLUIDIZATION DUE TO EXCESSIVE AGGLOMERATION WITHIN THE FLUIDIZED BED SAID TEMPERATURE BEING IN THE RANGE BETWEEN 200*C. AND 620*C., AND WITHDRAWING MOLECULARLY DEHYDRATED PHOSPHATE PRODUCT FROM THE FLUIDIZED BED AT A RATE APPROXIMATELY EQUAL TO THE RATE AT WHICH ALKALI METAL AND PHOSPHORUS COMPONENTS ENTER THE FLUIDIZED BED IN THE FEED.
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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) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |