US2314573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cleaner
Assignee: Individual
•
Filing: 1940-08-02
•
Granted: 1943-03-23
•
Expires: 1960-08-02
Abstract
No abstract record available.
Inventors
- 👤 George N Clark
- 👤 Ernest R Lesage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:46
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/40; B01D46/24; B01D46/2403; B01D2265/00; B01D2265/06
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) | 1946-03-22 | 1946-09-21 | 1947-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-03-22 | 1950-09-21 | 1951-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-03-22 | 1954-09-21 | 1955-03-23 | $7700.00 | Window Closed / Lapsed |