Patent US814837A successfully refreshed from Google Patents.
US814837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic dust removing and collecting apparatus.
Assignee: Individual
•
Filing: 1904-11-08
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Granted: 1906-03-18
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Expires: 1924-11-08
Abstract
No abstract record available.
Inventors
- 👤 Ephraim H Fenton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:34
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/42; B01D46/4272; Y; Y10; Y10S; Y10S15/00; Y10S15/08
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) | 1909-03-17 | 1909-09-16 | 1910-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1913-03-17 | 1913-09-16 | 1914-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1917-03-17 | 1917-09-16 | 1918-03-18 | $7700.00 | Window Closed / Lapsed |