US2934058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Humidifier structure
Assignee: General Filters Inc
•
Filing: 1957-04-01
•
Granted: 1960-04-26
•
Expires: 1977-04-01
Abstract
No abstract record available.
Inventors
- 👤 Robert P Redner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:09
CPC Classifications
F; F24; F24F; F24F6/00; F24F6/02; F24F6/04; F24F6/043; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7339
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2585764A
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US2588567A
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US2685301A
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US2737973A
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US2863153A
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US2793653A
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US2839279A
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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) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |