Patent US3309687A successfully refreshed from Google Patents.
US944779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for observing and separating heavy objects from dust-laden air-currents.
Assignee: Individual
•
Filing: 1908-07-11
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Granted: 1909-12-28
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Expires: 1928-07-11
Abstract
No abstract record available.
Inventors
- 👤 Daniel Fogarty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:01
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/42; B01D46/4254; 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) | 1912-12-27 | 1913-06-28 | 1913-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-12-27 | 1917-06-28 | 1917-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-12-27 | 1921-06-28 | 1921-12-28 | $7700.00 | Window Closed / Lapsed |