Patent US2838294A successfully refreshed from Google Patents.
US2838294A
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Humidifier
Assignee: ECONOMIC PRODUCTS Co
•
Filing: 1954-09-30
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Granted: 1958-06-10
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Expires: 1974-09-30
Abstract
No abstract record available.
Inventors
- 👤 Roy P Skerritt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:19
CPC Classifications
F; F24; F24F; F24F6/00; F24F6/02; F24F6/04; F24F6/043; Y; Y10; Y10S; Y10S261/00; Y10S261/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |