US2945554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cleaning devices and components therefor
Assignee: Individual
•
Filing: 1957-01-11
•
Granted: 1960-07-19
•
Expires: 1977-01-11
Abstract
No abstract record available.
Inventors
- 👤 Edward M Berly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:36
CPC Classifications
F; F24; F24F; F24F8/00; F24F8/80; B; B01; B01D; B01D46/00; B01D46/02; F24F8/10; F24F8/108; F24F8/15; F24F8/158; F24F2221/00; F24F2221/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190826998A
Cited
GB191119172A
Cited
US1786361A
Cited
DE595686C
Cited
FR787871A
Cited
US2225389A
Cited
US2221351A
Cited
DE855750C
Cited
US2671528A
Cited
US2414564A
Cited
GB711735A
Cited
US2774443A
Cited
US2719600A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |