US3317307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of granulating fertilizer
Assignee: WR Grace and Co
•
Filing: 1964-01-20
•
Granted: 1967-05-02
•
Expires: 1984-01-20
Abstract
No abstract record available.
Inventors
- 👤 Andrew E Wise
- 👤 Jr Judson K Chapin
- 👤 Thomas H Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:21
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/006; B01J2/30; C; C05; C05G; C05G5/00; C05G5/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
THE METHOD OF MAKING A NON-CAKING, GRANULATED, FREE-FLOWING FERTILIZER CHARACTERIZED BY A REDUCED TENDENCY TO CAKE UNDER MECHANICAL PRESSURE COMPRISING BLENDING DRY FERTILIZER SOLIDS WITH SOLUTIONS TO FORM A PLASTIC MASS, TUMBLING SAID MASS IN A CONFINED ROLLING BED ON A MOVING SURFACE TO FORM SAID MASS INTO AGGLOMERATES OF FERTILIZER SOLIDS, CONTINUOUSLY COATING SAID SURFACE BEFORE EACH CONTACT WITH SAID TUMBLING SOLIDS WITH A LAYER OF COMMINUTED LAMELLAR MINERAL SELECTED FROM THE GROUP CONSISTING OF VERMICULITE, TALC, CHLORITE AND MICA TO FORM AT LEAST A PARTIAL COATING ON SAID PELLETS AND DRYING SAID COATED PELLETS, THEREBY FORMING HARD ENCRUSTED PELLETS HAVING DISPERSED IN THE OUTER LAYER THREREOF SAID LAMELLAR MINERAL IN SUFFICIENT QUANTITY TO AVOID STICKING OF SAID PARTICLES.
Claim 2
Independent Claim
120 words
THE METHOD OF MAKING A NON-CAKING, GRANULATED, FREE-FLOWING FERTILIZER CHARACTERIZED BY A REDUCED TENDENCY TO CAKE UNDER MECHANICAL PRESSURE COMPRISING BLENDING DRY FERTILIZER SOLIDS WITH SOLUTIONS TO FORM A PLASTIC MASS, TUMBLING SAID MASS IN A CONFINED ROLLING BED ON A MOVING SURFACE TO FORM SAID MASS INTO AGGLOMERATES OF FERTILIZER SOLIDS, CONTINUOUSLY COATING SAID SURFACE BEFORE EACH CONTACT WITH SAID TUMBLING SOLIDS WITH A LAYER OF COMMINUTED LAMELLAR MINERAL SELECTED FROM THE GROUP CONSISTING OF VERMICULITE, TALC, CHLORITE AND MICA TO FORM AT LEAST A PARTIAL COATING ON SAID PELLETS AND DRYING SAID COATED PELLETS, THEREBY FORMING HARD ENCRUSTED PELLETS HAVING DISPERSED IN THE OUTER LAYER THREREOF SAID LAMELLAR MINERAL IN SUFFICIENT QUANTITY TO AVOID STICKING OF SAID PARTICLES.
References Cited (Backward Citations)
GB389508A
Cited
US3027249A
Cited
US2909869A
Cited
US3137565A
Cited
US2991170A
Cited
US3006753A
Cited
US3113015A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |