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Patent US2753979A successfully refreshed from Google Patents.
US2753979A
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Assignee: DE KALB AGRICULTURAL ASSOCIATION Inc
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Filing: 1951-07-11
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Granted: 1956-07-10
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Expires: 1971-07-11
Abstract
No abstract record available.
Inventors
- 👤 Charles E Blackman
- 👤 Kent G Blackman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:38
CPC Classifications
B; B65; B65G; B65G17/00; B65G17/12; B65G17/126; B65G2201/00; B65G2201/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US289635A
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US437506A
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DE352226C
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US1432076A
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US732499A
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US878650A
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US1357919A
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US1824756A
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US2370531A
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US2510212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-10 | 1960-01-09 | 1960-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-10 | 1964-01-09 | 1964-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-10 | 1968-01-09 | 1968-07-10 | $7700.00 | Window Closed / Lapsed |