US1342340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust-silencer for internal-combustion engines
Assignee: Individual
•
Filing: 1919-11-05
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Granted: 1920-06-01
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Expires: 1939-11-05
Abstract
No abstract record available.
Inventors
- 👤 Martin William Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:09
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/08; F01N13/082; F01N1/00; F01N1/08; F01N1/083; F01N1/16
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) | 1923-06-01 | 1923-12-01 | 1924-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1927-06-01 | 1927-12-01 | 1928-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1931-06-01 | 1931-12-01 | 1932-06-01 | $7700.00 | Window Closed / Lapsed |