US947431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silencer for explosive-engines.
Assignee: Individual
•
Filing: 1908-12-16
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Granted: 1910-01-25
•
Expires: 1928-12-16
Abstract
No abstract record available.
Inventors
- 👤 Pierre Ajasson De Grandsagne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:23
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/16; F01N1/165
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) | 1913-01-24 | 1913-07-26 | 1914-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1917-01-24 | 1917-07-26 | 1918-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1921-01-24 | 1921-07-26 | 1922-01-25 | $7700.00 | Window Closed / Lapsed |