Patent US2838978A successfully refreshed from Google Patents.
Patent US3716925A successfully refreshed from Google Patents.
US3716925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Humidifier attachment for clothes dryers
Assignee: Individual
•
Filing: 1971-10-12
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Granted: 1973-02-20
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Expires: 1991-10-12
Abstract
Abstract A HUMIDIFYING CHMBER IS PROVIDED IN THE VENT PIPE FROM A CLOTHES DRYER, AND THE AIR VENTED MAY BE BYPASSED THROUGH THE CHAMBR TO DELIVER HEATED MOIST AIR TO THE AREA NEAR THE DRYER. A DAMPER CONTROLS THE FLOW OF AIR SO THAT THE HOT MOIST AIR MAY BE VENTED TO OUTSIDE ATMOSPHERE WHEN DESIRED. D R A W I N G
Inventors
- 👤 R Hartung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:59
CPC Classifications
D; D06; D06F; D06F58/00; D06F58/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |