US3539327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparation of ammonium polyphosphate liquid fertilizer base
Assignee: LaRoche Industries Inc
•
Filing: 1967-11-07
•
Granted: 1970-11-10
•
Expires: 1987-11-07
Abstract
No abstract record available.
Inventors
- 👤 John W Hudson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:33
CPC Classifications
C; C05; C05B; C05B13/00; C05B13/06; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/28; C01B25/38; C01B25/40; C01B25/405
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2902342A
Cited
US2890935A
Cited
US3130033A
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US3019099A
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US3179496A
Cited
US3310371A
Cited
US3375063A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |