Patent US3032407A successfully refreshed from Google Patents.
US3032407A
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Process for the disintegration of crude phosphates with mineral acids
Assignee: Chemische Fabrik Kalk GmbH
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Filing: 1955-10-20
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Granted: 1962-05-01
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Expires: 1975-10-20
Abstract
No abstract record available.
Inventors
- 👤 Brandt Fritz
- 👤 Nees Hugo
- 👤 Liebrecht Klaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:55
CPC Classifications
C; C05; C05B; C05B11/00; C05B11/04; C05B11/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
IN A PROCESS FOR THE DISINTEGRATION OF CRUDE PHOSPHATES WITH A MIXED ACID CONTAINING NITRIC ACID AND AT LEAST ONE ACID FROM THE GROUP CONSISTING OF SULPHURIC ACID AND PHOSPHORIC ACID BY AGITATING THE CRUDE PHOSPHATES WITH A SOLUTION OF SAID ACIDS IN THE DISINTEGRATION MIXTURE IN A SEQUENCE OF CONNECTED VESSELS THROUGH WHICH SAID MIXTURE IS PASSED CONTINUOUSLY, CONTINUOUSLY RETURNING A PORTION OF SAID MIXTURE FROM THE LATER VESSELS TO THE INITIAL VESSELS, AND CONTINUOUSLY FEEDING CRUDE PHOSPHATES TO THE INITIAL VESSELS, THE METHOD OF PREVENTING NITROGEN LOSSES WHICH COMPRISES CONTINUOUSLY ADDING FRESH MIXED ACID ABOVE IDENTIFIED TO THE RETURNING MIXTURE BEFORE SAID MIXTURE REACHES THE INITIAL VESSELS.
Claim 2
Dependent Claim
109 words
IN A PROCESS FOR THE DISINTEGRATION OF CRUDE PHOSPHATES WITH A MIXED ACID CONTAINING NITRIC ACID AND AT LEAST ONE ACID FROM THE GROUP CONSISTING OF SULPHURIC ACID AND PHOSPHORIC ACID BY AGITATING THE CRUDE PHOSPHATES WITH A SOLUTION OF SAID ACIDS IN THE DISINTEGRATION MIXTURE IN A SEQUENCE OF CONNECTED VESSELS THROUGH WHICH SAID MIXTURE IS PASSED CONTINUOUSLY, CONTINUOUSLY RETURNING A PORTION OF SAID MIXTURE FROM THE LATER VESSELS TO THE INITIAL VESSELS, AND CONTINUOUSLY FEEDING CRUDE PHOSPHATES TO THE INITIAL VESSELS, THE METHOD OF PREVENTING NITROGEN LOSSES WHICH COMPRISES CONTINUOUSLY ADDING FRESH MIXED ACID ABOVE IDENTIFIED TO THE RETURNING MIXTURE BEFORE SAID MIXTURE REACHES THE INITIAL VESSELS.
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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) | 1965-04-30 | 1965-10-30 | 1966-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-30 | 1969-10-30 | 1970-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-30 | 1973-10-30 | 1974-05-01 | $7700.00 | Window Closed / Lapsed |