US2605752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Humidifier and air cleaner
Assignee: Individual
•
Filing: 1946-08-23
•
Granted: 1952-08-05
•
Expires: 1966-08-23
Abstract
No abstract record available.
Inventors
- 👤 Michael F Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:57
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/02; F02M35/04; F02M35/042; 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)
US823382A
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US887017A
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US1097380A
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US1278836A
Cited
US1585488A
Cited
US1682546A
Cited
US2108556A
Cited
US2392565A
Cited
US2388213A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-05 | 1956-02-04 | 1956-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-05 | 1960-02-04 | 1960-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-05 | 1964-02-04 | 1964-08-05 | $7700.00 | Window Closed / Lapsed |