Patent US2770008A successfully refreshed from Google Patents.
US2770008A
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Apparatus for producing urea prills
Assignee: Deere and Co
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Filing: 1954-07-14
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Granted: 1956-11-13
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Expires: 1974-07-14
Abstract
No abstract record available.
Inventors
- 👤 William W Yeandle
- 👤 Nolan A Carter
- 👤 James T Purnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:45
CPC Classifications
C; C07; C07C; C07C273/00; C07C273/02; B; B01; B01J; B01J2/00; B01J2/02; B28; B28B; B28B1/00; B28B1/54; C05; C05C; C05C9/00; C05C9/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2360094A
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US2538345A
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US2551452A
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US2562149A
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US2557549A
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US2528407A
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US2597744A
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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) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |