Patent US2845340A successfully refreshed from Google Patents.
US2845340A
Expired / Lapsed
US
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Method of making complex fertilizer
Assignee: Gewerkschaft Victor
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Filing: 1955-01-13
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Granted: 1958-07-29
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Expires: 1975-01-13
Abstract
No abstract record available.
Inventors
- 👤 Kurt H Karbe
- 👤 Wilhelm F Boos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:49
CPC Classifications
C; C05; C05B; C05B11/00; C05B11/04; C05B11/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A METHOD OF MAKING A COMPLEX FERTILIZER, WHICH INCLUDES THE STEPS OF: BREAKING UP RAW PHOSPHATE BY MEANS OF NITRIC ACID, ADMIXING THERETO MAGNESIUM SULPHATE (MGSO4), NEUTRALIZING THE THUS OBTAINED MIXTURE UP TO A PH VALUE OF BETWEEN 4 AND 5 WHILE ADDING THERETO A POTASH SALT AT THE LATEST WHEN SAID MIXTURE HAS REACHED A PH VALUE OF 4 TO 5, CONTINUING THE NEUTRALIZATION OF THE THUS OBTAINED MIXTURE UP TO A PH VALUE OF APPROXIMATELY 7.5, SIMULTANEOUSLY INTRODUCING AMMONIA AND CARBONIC ACID UP TO A PH VALUE OF APPROXIMATELY 8.5, AND INCREASING THE CO2 CONTENT OF THE MIXTURE UP TO APPROXIMATELY 3.5% CO2.
Claim 2
Independent Claim
105 words
A METHOD OF MAKING A COMPLEX FERTILIZER, WHICH INCLUDES THE STEPS OF: BREAKING UP RAW PHOSPHATE BY MEANS OF NITRIC ACID, ADMIXING THERETO MAGNESIUM SULPHATE (MGSO4), NEUTRALIZING THE THUS OBTAINED MIXTURE UP TO A PH VALUE OF BETWEEN 4 AND 5 WHILE ADDING THERETO A POTASH SALT AT THE LATEST WHEN SAID MIXTURE HAS REACHED A PH VALUE OF 4 TO 5, CONTINUING THE NEUTRALIZATION OF THE THUS OBTAINED MIXTURE UP TO A PH VALUE OF APPROXIMATELY 7.5, SIMULTANEOUSLY INTRODUCING AMMONIA AND CARBONIC ACID UP TO A PH VALUE OF APPROXIMATELY 8.5, AND INCREASING THE CO2 CONTENT OF THE MIXTURE UP TO APPROXIMATELY 3.5% CO2.
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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) | 1961-07-28 | 1962-01-27 | 1962-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-28 | 1966-01-27 | 1966-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-28 | 1970-01-27 | 1970-07-29 | $7700.00 | Window Closed / Lapsed |