Patent US720791A successfully refreshed from Google Patents.
US720791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust-collector.
Assignee: Individual
•
Filing: 1900-03-27
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Granted: 1903-02-17
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Expires: 1920-03-27
Abstract
No abstract record available.
Inventors
- 👤 Emil R Draver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:50
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/24; B01D46/26
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) | 1906-02-16 | 1906-08-18 | 1907-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1910-02-16 | 1910-08-18 | 1911-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1914-02-16 | 1914-08-18 | 1915-02-17 | $7700.00 | Window Closed / Lapsed |