Patent US2839279A successfully refreshed from Google Patents.
US2839279A
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US
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Humidifier
Assignee: NAT U S RADIATOR CORP
•
Filing: 1956-06-13
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Granted: 1958-06-17
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Expires: 1976-06-13
Abstract
No abstract record available.
Inventors
- 👤 Marion I Levy
- 👤 John E Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:37
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/02; F; F24; F24F; F24F6/00; F24F6/02; F24F6/04; F24F6/043; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7339; Y10T137/7355; Y10T137/7358; Y10T137/7439; Y10T137/7446; Y10T137/7494
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1158553A
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US2303235A
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US2585764A
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US2573158A
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US2709427A
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US2709428A
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US2746481A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |