US2552966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dairy barn and poultry house ventilator
Assignee: CANYON SWI Inc
•
Filing: 1948-07-23
•
Granted: 1951-05-15
•
Expires: 1968-07-23
Abstract
No abstract record available.
Inventors
- 👤 Alonzo M Harp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:32
CPC Classifications
A; A01; A01K; A01K1/00; A01K1/0047; A01K1/0052; F; F24; F24F; F24F7/00; F24F7/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2005615A
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US2252179A
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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) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |