Patent US3233968A successfully refreshed from Google Patents.
US3233968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of condensed phosphates
Assignee: Marchon Products Ltd
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Filing: 1962-04-24
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Granted: 1966-02-08
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Expires: 1982-04-24
Abstract
No abstract record available.
Inventors
- 👤 Koebner Adolf
- 👤 Robert H Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:09
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
144 words
IN THE PROCESS FOR MANUFACTURING SODIUM CONDENSED PHOSPHATES WHEREIN A MIXTURE OF MONOSODIUM ORTHOPHOSPHATE AND DISODIUM ORTHOPHOSPHATE IS CALCINED AT ELEVATED TEMPERATURES BY THE UPWARD PASSAGE OF A HEATED GAS THROUGH A FUIDIZED BED CONSISTING OF PARTICLES OF SAID SODIUM ORTHOPHOSPHATES AND PARTICLES OF SODIUM CONDENSED PHOSPHATES, SAID SODIUM ORTOPHOSPHATES THEREBY UNDERGOING THERMAL DEHYDRATION AND FORMING SODIUM CONDENSED PHOSPHATES, THE IMPROVEMENT COMPRISING MAINTAINING SAID SODIUM CONDENSED PHOSPHATE IN AN AMOUNT AT LEAST 50% BY WEIGHT OF THE TOTAL FLUIDIZED BED, AND WITHDRAWING FROM SAID FLUIDIZED BED SODIUM CONDENSED PHOSPHATES HAVING SUBSTANTIALLY THE SAME COMPOSITION AS THE SODIUM CONDENSED PHOSPHATES IN THE FLUIDIZED BED WHILE MAINTAINING THE FLUIDIZED BED TO CONTAIN AT LEAST 50% SODIUM CONDENSED PHOSPHATES BY BALANCING THE RATES AT WHICH SAID SODIUM ORTHOPHOSPHATES ARE ADDED TO SAID BED AND THE RATES AT WHICH SAID SODIUM CONDENSED PHOSPHATES ARE WITHDRAWN FROM SAID BED.
Claim 2
Dependent Claim
144 words
IN THE PROCESS FOR MANUFACTURING SODIUM CONDENSED PHOSPHATES WHEREIN A MIXTURE OF MONOSODIUM ORTHOPHOSPHATE AND DISODIUM ORTHOPHOSPHATE IS CALCINED AT ELEVATED TEMPERATURES BY THE UPWARD PASSAGE OF A HEATED GAS THROUGH A FUIDIZED BED CONSISTING OF PARTICLES OF SAID SODIUM ORTHOPHOSPHATES AND PARTICLES OF SODIUM CONDENSED PHOSPHATES, SAID SODIUM ORTOPHOSPHATES THEREBY UNDERGOING THERMAL DEHYDRATION AND FORMING SODIUM CONDENSED PHOSPHATES, THE IMPROVEMENT COMPRISING MAINTAINING SAID SODIUM CONDENSED PHOSPHATE IN AN AMOUNT AT LEAST 50% BY WEIGHT OF THE TOTAL FLUIDIZED BED, AND WITHDRAWING FROM SAID FLUIDIZED BED SODIUM CONDENSED PHOSPHATES HAVING SUBSTANTIALLY THE SAME COMPOSITION AS THE SODIUM CONDENSED PHOSPHATES IN THE FLUIDIZED BED WHILE MAINTAINING THE FLUIDIZED BED TO CONTAIN AT LEAST 50% SODIUM CONDENSED PHOSPHATES BY BALANCING THE RATES AT WHICH SAID SODIUM ORTHOPHOSPHATES ARE ADDED TO SAID BED AND THE RATES AT WHICH SAID SODIUM CONDENSED PHOSPHATES ARE WITHDRAWN FROM SAID BED.
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) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |