Patent FR671417A successfully refreshed from Google Patents.
US2663628A
Expired / Lapsed
US
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Method of making a lignin fertilizer base
Assignee: Individual
•
Filing: 1950-06-29
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Granted: 1953-12-22
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Expires: 1970-06-29
Abstract
No abstract record available.
Inventors
- 👤 Alfred M Thomsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:41
CPC Classifications
C; C05; C05F; C05F7/00; C05F7/02; C05B; C05B17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1144905A
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US1546562A
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US1710272A
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US1933445A
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US1976905A
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US2439432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |