Patent US681522A successfully refreshed from Google Patents.
US681522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Muffling device.
Assignee: Individual
•
Filing: 1901-01-25
•
Granted: 1901-08-27
•
Expires: 1921-01-25
Abstract
No abstract record available.
Inventors
- 👤 Alpha O Very
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:53
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1904-08-26 | 1905-02-25 | 1905-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1908-08-26 | 1909-02-25 | 1909-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1912-08-26 | 1913-02-25 | 1913-08-27 | $7700.00 | Window Closed / Lapsed |