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US3449840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous grain drying apparatus
Assignee: Clayton & Lambert Manufacturing Co
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Filing: 1967-10-18
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Granted: 1969-06-17
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Expires: 1987-10-18
Abstract
No abstract record available.
Inventors
- 👤 James H Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:34
CPC Classifications
F; F26; F26B; F26B9/00; F26B9/10; F26B25/00; F26B25/001; F26B25/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |