Patent US3725029A successfully refreshed from Google Patents.
US3725029A
Expired / Lapsed
US
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Preparation of ammonium sulfate fertilizer constituent
Assignee: GA PACIFIC CORP
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Filing: 1971-09-27
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Granted: 1973-04-03
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Expires: 1991-09-27
Abstract
Abstract A FERTILIZER CONSTITUENT OF AMMONIUM SULFATE FOR DRIED FERTILIZER BLENDING IS PREPARED BY GRANULATING THE AMMONIUM SULFATE IN A DRUM GRANULATOR USING A CONCENTRATED LIGNOSULFONATE SOLUTION AS A BINDER, COATING THE GRANULATED PARTICLES OF AMMONIUM SULFATE WITH MOLTEN UREA TO HAVE THE UREA SOLIDIFY UPON THE SURFACE OF THE AMMONIUM SULFATE PARTICLES, AND CONTACTING THE COATED PARTICLES WITH A DRY POWDER AS AN ANTI-CAKING AGENT.
Inventors
- 👤 K Blackmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:40
CPC Classifications
C; C05; C05C; C05C3/00; C05C3/005
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |