Patent US2573158A successfully refreshed from Google Patents.
US2573158A
Expired / Lapsed
US
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Air humidifier
Assignee: Individual
•
Filing: 1949-03-07
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Granted: 1951-10-30
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Expires: 1969-03-07
Abstract
No abstract record available.
Inventors
- 👤 Walter E Muth
- 👤 Roland G Naylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:38
CPC Classifications
F; F24; F24F; F24F6/00; F24F6/02; F24F6/04; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7032; Y10T137/7287; Y10T137/7339; Y10T137/7349
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) | 1954-10-29 | 1955-04-30 | 1955-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-29 | 1959-04-30 | 1959-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-29 | 1963-04-30 | 1963-10-30 | $7700.00 | Window Closed / Lapsed |