Patent US3708276A successfully refreshed from Google Patents.
US3708276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fertilizer coated with discontinuous layer
Assignee: GEWERK VICTOR CHEM WERKE
•
Filing: 1969-06-27
•
Granted: 1973-01-02
•
Expires: 1989-06-27
Abstract
Abstract GRANULAR FERTILIZER HAVING CONTROLLED NUTRIENT RELEASE IS PROVIDED BY COATING A FERTILIZER WITH A PERVIOUS, DISCONTINUOUS LAYER EXPOSED TO THE ATMOSPHERE. THE LAYER IS FORMED OF A WATER-INSOLUBLE SYNTHETIC RESIN AND PARTICLES FOREIGN TO THE RESIN.
Inventors
- 👤 H Hecht
- 👤 H Schwandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:21
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/006; C; C05; C05G; C05G5/00; C05G5/30; C05G5/37
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |