US3022154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentrated liquid fertilizers from superphosphoric acid and potassium hydroxide
Assignee: TENNESSEE VALLEY ANTHORITY
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Filing: 1960-05-06
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Granted: 1962-02-20
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Expires: 1980-05-06
Abstract
No abstract record available.
Inventors
- 👤 John M Potts
- 👤 Henry W Elder
- 👤 Jr John Franklin Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:07
CPC Classifications
C; C05; C05B; C05B13/00; C05B13/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A PROCESS FOR THE PRODUCTION OF A TEMPERATURE-STABLE FERTILIZER SOLUTION HAVING A SALTING-OUT TEMPERATURE BELOW 32*F. WHICH COMPRISES THE STEPS OF SIMULTANEOUSLY INTRODUCING A STREAM OF SUPERPHOSPHORIC ACID CONTAINING FROM ABOUT 75 TO ABOUT 77 PERCENT &2O5 AND A STREAM OF AQUEOUS POTASSIUM HYDROXIDE CONTAINING FROM ABOUT 40 TO ABOUT 67 PERCENT KOH INTO A REACTION ZONE; MIXING IN SAID REACTION ZONE SAID STREAMS WITH VIGOROUS AGITATION; RESPECTIVELY MAINTAINING THE TEMPERATURE OF THE MATERIALS IN SAID REACTION ZONE IN THE RANGE OF ABOUT 80* F; TO 240*F., CONTROLLING THE RATIO OF INTRODUCTION OF EACH OF SAID STREAMS SO AS TO MAINTAIN THE PH IN SAID REACTION
Claim 2
Dependent Claim
106 words
A PROCESS FOR THE PRODUCTION OF A TEMPERATURE-STABLE FERTILIZER SOLUTION HAVING A SALTING-OUT TEMPERATURE BELOW 32*F. WHICH COMPRISES THE STEPS OF SIMULTANEOUSLY INTRODUCING A STREAM OF SUPERPHOSPHORIC ACID CONTAINING FROM ABOUT 75 TO ABOUT 77 PERCENT &2O5 AND A STREAM OF AQUEOUS POTASSIUM HYDROXIDE CONTAINING FROM ABOUT 40 TO ABOUT 67 PERCENT KOH INTO A REACTION ZONE; MIXING IN SAID REACTION ZONE SAID STREAMS WITH VIGOROUS AGITATION; RESPECTIVELY MAINTAINING THE TEMPERATURE OF THE MATERIALS IN SAID REACTION ZONE IN THE RANGE OF ABOUT 80* F; TO 240*F., CONTROLLING THE RATIO OF INTRODUCTION OF EACH OF SAID STREAMS SO AS TO MAINTAIN THE PH IN SAID REACTION
References Cited (Backward Citations)
US2950961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |