Patent US3313614A successfully refreshed from Google Patents.
US3313614A
Expired / Lapsed
US
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Method of making ammonium phoshatecontaining fertilizer
Assignee: Fisons Fertilizers Ltd
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Filing: 1964-02-26
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Granted: 1967-04-11
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Expires: 1984-02-26
Abstract
No abstract record available.
Inventors
- 👤 Sharples Kenneth
- 👤 Sinclair Alan George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:45
CPC Classifications
C; C05; C05B; C05B1/00; C05B1/04; C05B7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
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
Claim 2
Dependent Claim
168 words
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-10 | 1970-10-10 | 1971-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-10 | 1974-10-10 | 1975-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-10 | 1978-10-10 | 1979-04-11 | $7700.00 | Window Closed / Lapsed |