Patent US1263833A successfully refreshed from Google Patents.
US1263833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilating system for stables and other buildings.
Assignee: Individual
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Filing: 1917-03-02
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Granted: 1918-04-23
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Expires: 1937-03-02
Abstract
No abstract record available.
Inventors
- 👤 Gustaf H Akerlund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:19
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/02; A; A01; A01K; A01K1/00; A01K1/0047; A01K1/0058
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1921-04-22 | 1921-10-22 | 1922-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-04-22 | 1925-10-22 | 1926-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-04-22 | 1929-10-22 | 1930-04-23 | $7700.00 | Window Closed / Lapsed |