US2991559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grain drier
Assignee: Individual
•
Filing: 1957-10-16
•
Granted: 1961-07-11
•
Expires: 1977-10-16
Abstract
No abstract record available.
Inventors
- 👤 Harold W Pierpoint
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:53
CPC Classifications
F; F26; F26B; F26B17/00; F26B17/12; F26B17/122; F26B17/124
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1266013A
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US1341676A
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US1863803A
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GB278263A
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US1897394A
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US2119615A
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US2055725A
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US2520871A
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US2772487A
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US2740204A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |