US3538618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grain drying apparatus
Assignee: Farm Fans Inc
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Filing: 1969-08-15
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Granted: 1970-11-10
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Expires: 1989-08-15
Abstract
No abstract record available.
Inventors
- 👤 Charles D Neuenschwander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:15
CPC Classifications
F; F26; F26B; F26B9/00; F26B9/10; B; B65; B65G; B65G65/00; B65G65/30; B65G65/34; B65G65/40; B65G65/46; B65G65/466; F26B9/06; F26B9/08; F26B9/082
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) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |