USRE27238E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing slow release fertilizer compositions
Assignee: —
•
Filing: 1970-01-16
•
Granted: 1971-11-23
•
Expires: 1990-01-16
Abstract
Abstract A METHOD FOR MAKING A SLOW RELEASE EXTRUDED COMPRESSED PELLETIZED FERTILIZER COMPOSITION COMPRISING AT LEAST 75% BY WEIGHT OF A SUITABLE FERTILIZER SUBSTANCE AND LESS THAN 15% BY WEIGHT OF A WATER SOLUBLE HYDROCARBON BINDER MATERIAL, SAID BINDER AND FERTILIZER BEING FURTHER ENCAPSULATED WITH EITHER MICROCRYSTALLINE WAX, ASPHALT, OR A MIXTURE OF WAX AND ASPHALT SO AS TO PROVIDE A COATING COMPLETELY AROUND THE OUTSIDE OF THE FERTILIZER SUBSTANCE. SUCH PELLETS EXHIBIT AN IMPROVED LEACHING RATE OF THE FERTILIZER SUBSTANCE TO THE SURROUNDING AREA OVER SIMILAR COMMERICAL MATERIALS.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:43
CPC Classifications
C; C05; C05G; C05G5/00; C05G5/30; C05G5/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |