Patent US3345443A successfully refreshed from Google Patents.
US3345443A
Expired / Lapsed
US
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Process for the manufacture of phosphate pellets
Assignee: Knapsack AG
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Filing: 1964-07-07
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Granted: 1967-10-03
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Expires: 1984-07-07
Abstract
No abstract record available.
Inventors
- 👤 Ziegler Hans-Werner
- 👤 Kowalski Werner
- 👤 Hinz Arnulf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:23
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/003; B; B01; B01J; B01J2/00; B01J2/14; B01J2/28; C01B25/01; C01B25/16; C01B25/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A PROCESS FOR MAKING PELLETS COMPRISING SPRAYING FINELY GROUND CRUDE PHOSPHATE POWDER ON A GRANULATING PLATE WITH A SUSPENSION CONSISTING ESSENTIALLY OF (1) AN AQUEOUS PHASE CONTAINING ABOUT 1-2% ALKALI METAL PHOSPHATE BINDER IN SOLUTION, AND (2) A SOLIDS PHASE CONTAINING (A) ABOUT 28-32% BY WEIGHT PHOSPHORUS PRODUCTION OFF-GAS ELECTROFILTER DUST, (B) BENTONITE CLAY ADDED TO OBTAIN A SUSPENSION CONTAINING ABOUT 20-25% SOLID MATTER BY WEIGHT AND (C) FINE PHOSPHATE DUST AS CHARACTERIZED BY THAT OBTAINED IN DUST REMOVAL DEVICES IN A GRINDING INSTALLATION TO PHOSPHATE DRESSING, TO OBTAIN A WORKING SUSPENSION HAVING A TOTAL OF ABOUT 4045% BY WEIGHT SOLID MATTER; SHAPING THE SPRAYED CRUDE PHOSPHATE POWDER INTO REEN PELLETS, DRYING, HARDENING AND BAKING PELLETS.
Claim 2
Dependent Claim
116 words
A PROCESS FOR MAKING PELLETS COMPRISING SPRAYING FINELY GROUND CRUDE PHOSPHATE POWDER ON A GRANULATING PLATE WITH A SUSPENSION CONSISTING ESSENTIALLY OF (1) AN AQUEOUS PHASE CONTAINING ABOUT 1-2% ALKALI METAL PHOSPHATE BINDER IN SOLUTION, AND (2) A SOLIDS PHASE CONTAINING (A) ABOUT 28-32% BY WEIGHT PHOSPHORUS PRODUCTION OFF-GAS ELECTROFILTER DUST, (B) BENTONITE CLAY ADDED TO OBTAIN A SUSPENSION CONTAINING ABOUT 20-25% SOLID MATTER BY WEIGHT AND (C) FINE PHOSPHATE DUST AS CHARACTERIZED BY THAT OBTAINED IN DUST REMOVAL DEVICES IN A GRINDING INSTALLATION TO PHOSPHATE DRESSING, TO OBTAIN A WORKING SUSPENSION HAVING A TOTAL OF ABOUT 4045% BY WEIGHT SOLID MATTER; SHAPING THE SPRAYED CRUDE PHOSPHATE POWDER INTO REEN PELLETS, DRYING, HARDENING AND BAKING PELLETS.
References Cited (Backward Citations)
CA617337A
Cited
US2946112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |