US943422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for treating gases and separating smoke and dust therefrom.
Assignee: Individual
•
Filing: 1908-02-24
•
Granted: 1909-12-14
•
Expires: 1928-02-24
Abstract
No abstract record available.
Inventors
- 👤 Ernest Gustave Knoepfel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:41
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/1411; F24F3/1417; Y; Y10; Y10S; Y10S261/00; Y10S261/09
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) | 1912-12-13 | 1913-06-14 | 1913-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-12-13 | 1917-06-14 | 1917-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-12-13 | 1921-06-14 | 1921-12-14 | $7700.00 | Window Closed / Lapsed |