US2582356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilating device
Assignee: Individual
•
Filing: 1947-10-30
•
Granted: 1952-01-15
•
Expires: 1967-10-30
Abstract
No abstract record available.
Inventors
- 👤 John R Rauhut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:33
CPC Classifications
F; F24; F24F; F24F11/00; F24F11/0001; F24F7/00; F24F7/007
Claims Analysis
Total Claims: 0
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US2240406A
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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) | 1955-01-14 | 1955-07-16 | 1956-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-14 | 1959-07-16 | 1960-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-14 | 1963-07-16 | 1964-01-15 | $7700.00 | Window Closed / Lapsed |