US2717148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cleaner and humidifier
Assignee: Individual
•
Filing: 1953-11-19
•
Granted: 1955-09-06
•
Expires: 1973-11-19
Abstract
No abstract record available.
Inventors
- 👤 Hall Michael Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:47
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/02; F02M35/04; F24; F24F; F24F6/00; F24F6/02; F24F6/04; Y; Y10; Y10S; Y10S261/00; Y10S261/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US528882A
Cited
US2170991A
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US1274418A
Cited
US1380987A
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US1784725A
Cited
FR822200A
Cited
US2474746A
Cited
US2606009A
Cited
US2640689A
Cited
US2648272A
Cited
US2673079A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-05 | 1959-03-07 | 1959-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-05 | 1963-03-07 | 1963-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-05 | 1967-03-07 | 1967-09-06 | $7700.00 | Window Closed / Lapsed |