US1841347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filtering and cleaning device
Assignee: Individual
•
Filing: 1927-02-26
•
Granted: 1932-01-12
•
Expires: 1947-02-26
Abstract
No abstract record available.
Inventors
- 👤 Daniel V Tuttle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:10
CPC Classifications
F; F24; F24D; F24D5/00; B; B01; B01D; B01D46/00; B01D46/10; B01D46/42; B01D46/4227; Y; Y10; Y10S; Y10S55/00; Y10S55/24
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) | 1935-01-11 | 1935-07-13 | 1936-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-01-11 | 1939-07-13 | 1940-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-01-11 | 1943-07-13 | 1944-01-12 | $7700.00 | Window Closed / Lapsed |