US2946655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of diammonium phosphate
Assignee: Beazer East Inc
•
Filing: 1957-08-22
•
Granted: 1960-07-26
•
Expires: 1977-08-22
Abstract
No abstract record available.
Inventors
- 👤 Edward J Helm
- 👤 Elwood V Schulte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:10
CPC Classifications
C; C05; C05B; C05B7/00; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/28; C01B25/38; C01B25/40; C01B25/405
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PROCESS FOR THE RECOVERY OF AMMONIA FROM COKE OVEN GAS AS DIAMMONIUM PHOSPHATE CRYSTALS IN THE ABSENCE OF FORMATIONS OF MONOAMMONIUM PHOSPHATE CRYSTALS COMPRISING THE STEPS OF CONTACTING SAID GAS WITH AN AQUEOUS SOLUTION OF AMMONIUM PHOSPHATE AT A TEMPERATURE OF BETWEEN ABOUT 30 AND 60*C. AND HAVING AN AMMONIA TO PHOSPHORIC ACID MOLECULAR RATIO BETWEEN ABOUT 1.45 TO 1.55 SO AS TO ABSORB THE AMMONIA FROM SAID GAS, HEATING SAID AMMONIA ENRICHED SOLUTION TO ITS BOILING POINT TO EVAPORATED WATER THEREFORM SO THAT SAID AMMONIA ENRICHED SOLUTION BECOMES SATURATED WITH RESPECT TO AMMONIUM PHOSPHATE, COOLING AND AGITATING SAID SATURATED AND ENRICHED AMMONIA SOLUTION WHILE ADDING AMMONIA
Claim 2
Dependent Claim
108 words
A PROCESS FOR THE RECOVERY OF AMMONIA FROM COKE OVEN GAS AS DIAMMONIUM PHOSPHATE CRYSTALS IN THE ABSENCE OF FORMATIONS OF MONOAMMONIUM PHOSPHATE CRYSTALS COMPRISING THE STEPS OF CONTACTING SAID GAS WITH AN AQUEOUS SOLUTION OF AMMONIUM PHOSPHATE AT A TEMPERATURE OF BETWEEN ABOUT 30 AND 60*C. AND HAVING AN AMMONIA TO PHOSPHORIC ACID MOLECULAR RATIO BETWEEN ABOUT 1.45 TO 1.55 SO AS TO ABSORB THE AMMONIA FROM SAID GAS, HEATING SAID AMMONIA ENRICHED SOLUTION TO ITS BOILING POINT TO EVAPORATED WATER THEREFORM SO THAT SAID AMMONIA ENRICHED SOLUTION BECOMES SATURATED WITH RESPECT TO AMMONIUM PHOSPHATE, COOLING AND AGITATING SAID SATURATED AND ENRICHED AMMONIA SOLUTION WHILE ADDING AMMONIA
References Cited (Backward Citations)
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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) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |