Patent US2929538A successfully refreshed from Google Patents.
Patent US3348938A successfully refreshed from Google Patents.
US3348938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing granular mixed fertilizer
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1964-04-15
•
Granted: 1967-10-24
•
Expires: 1984-04-15
Abstract
No abstract record available.
Inventors
- 👤 Sherrington Peter John
- 👤 Jones Daniel John Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:49
CPC Classifications
C; C05; C05B; C05B19/00; B; B01; B01J; B01J2/00; B01J2/12; B01J2/16
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
147 words
A CONTINUOUS TWO-STEP PROCESS FOR PRODUCING GRANULAR MIXED FERTILIZER COMPRISING: CONTINUOUSLY INTRODUCING INTO AN AGGLOMERATING ZONE FINELY DIVIDED RECYCLED PRODUCT OBTAINED AS HEREINAFTER DESCRIBED AND A FERTILLIZER SUBSTANCE CONTAINING UP TO 25% WATER BY WEIGHT; AGITATING THE RECYCLED PRODUCT AND FERTILIZER SUBSTANCE IN THE AGGLOMERATING ZONE TO AGGLOMERATE THE SAME INTO GRANULES HAVING LOW WATER CONTENT; CONTINUOUSLY REMOVING THE GRANULES FROM THE AGGLOMERATING ZONE AND CONTINUOUSLY TRANSFERRING THEM TO A COATING ZONE; COATING AND DRYING THE GRANULES IN THE COATING ZONE WITHOUT EFFECTING FURTHER AGGLOMERATION BY CASCADING THEM THROUGH A STREAM OF HOT GAS AND BY SIMULTANEOUSLY SPRAYING THEM WITH A LIQUID FERTILIZER SUBSTANCE OF DIFFERENT COMPOSITION FROM THE GRANULES TO THEREBY FORM ENLARGED GRANULES SUBSTANTIALLY FREE OF MOISTURE; CONTINUOUSLY REMOVING THE ENLARGED GRANULES; SIEVING THE REMOVED GRANULES TO OBTAIN A PRODUCT OF DESIRED GRADING; AND RECYCLING TO THE AGGLOMERATING ZONE THE UNDERSIZE AND CRUSHED OVERSIZE PARTICLES.
Claim 2
Dependent Claim
147 words
A CONTINUOUS TWO-STEP PROCESS FOR PRODUCING GRANULAR MIXED FERTILIZER COMPRISING: CONTINUOUSLY INTRODUCING INTO AN AGGLOMERATING ZONE FINELY DIVIDED RECYCLED PRODUCT OBTAINED AS HEREINAFTER DESCRIBED AND A FERTILLIZER SUBSTANCE CONTAINING UP TO 25% WATER BY WEIGHT; AGITATING THE RECYCLED PRODUCT AND FERTILIZER SUBSTANCE IN THE AGGLOMERATING ZONE TO AGGLOMERATE THE SAME INTO GRANULES HAVING LOW WATER CONTENT; CONTINUOUSLY REMOVING THE GRANULES FROM THE AGGLOMERATING ZONE AND CONTINUOUSLY TRANSFERRING THEM TO A COATING ZONE; COATING AND DRYING THE GRANULES IN THE COATING ZONE WITHOUT EFFECTING FURTHER AGGLOMERATION BY CASCADING THEM THROUGH A STREAM OF HOT GAS AND BY SIMULTANEOUSLY SPRAYING THEM WITH A LIQUID FERTILIZER SUBSTANCE OF DIFFERENT COMPOSITION FROM THE GRANULES TO THEREBY FORM ENLARGED GRANULES SUBSTANTIALLY FREE OF MOISTURE; CONTINUOUSLY REMOVING THE ENLARGED GRANULES; SIEVING THE REMOVED GRANULES TO OBTAIN A PRODUCT OF DESIRED GRADING; AND RECYCLING TO THE AGGLOMERATING ZONE THE UNDERSIZE AND CRUSHED OVERSIZE PARTICLES.
Claim 3
Dependent Claim
34 words
PROCESS AS IN CLAIM 1 WHEREIN SAID FIRST FERTILIZER SUBSTANCE CONTAINS FROM 0.5% TO 10% BY WEIGHT OF WATER AND COMPRISES A FERTILZER SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF AMMONIUM NITRATE AND UREA.
References Cited (Backward Citations)
US2926079A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |