US3666523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for coating particulate material with finely divided solids
Assignee: Wyeth Holdings LLC
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Filing: 1971-06-02
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Granted: 1972-05-30
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Expires: 1991-06-02
Abstract
Abstract A METHOD IS GIVEN FOR UNIFORMLY COATING PARTICULATE FERTILIZER MATERIAL WITH SMALL AMOUNTS OF FINELY DIVIDED MICRO AND/OR SECONDARY NUTRIENTS BY FORMING THE PARTICULATE BASE FERTILIZER MATERIAL IN A FALLING CURTAIN, SPRAYING THE BASE MATERIAL WITH A BINDER SOLUTION, FINALLY MIXING IN AN AGITATED BED THE BASE MATERIAL WITH THE FINELY DIVIDED NUTRIENTS, THUS GIVING A PRODUCT OF MICRO AND/OR SECONDARY NUTRIENTS UNIFORMLY DISTRIBUTED OVER THE SURFACES OF THE PARTICULATE BASE FERTILIZER.
Inventors
- 👤 Harold Henry Nau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:53
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/02; B01J13/04; B01J2/00; B01J2/006; C; C05; C05B; C05B19/00
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |