US2788084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air washer and humidifier
Assignee: Individual
•
Filing: 1952-10-29
•
Granted: 1957-04-09
•
Expires: 1972-10-29
Abstract
No abstract record available.
Inventors
- 👤 Holzknecht Felix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:46
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/02; F02M35/04; F02M35/042; B; B01; B01D; B01D47/00; B01D47/02; B01D47/021; F02M25/00; F02M25/022; F02M25/0221; F02M25/0225; F02M25/025; F02M25/028; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US404621A
Cited
US773784A
Cited
US1884534A
Cited
US1908207A
Cited
US2147094A
Cited
US2186152A
Cited
US2422527A
Cited
US2596782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-08 | 1960-10-08 | 1961-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-08 | 1964-10-08 | 1965-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-08 | 1968-10-08 | 1969-04-09 | $7700.00 | Window Closed / Lapsed |