US1483354A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-engine muffler
Assignee: Individual
•
Filing: 1919-11-25
•
Granted: 1924-02-12
•
Expires: 1939-11-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Frederick Kopper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:05
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/08; F01N13/082; 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) | 1927-02-11 | 1927-08-13 | 1928-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-02-11 | 1931-08-13 | 1932-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-02-11 | 1935-08-13 | 1936-02-12 | $7700.00 | Window Closed / Lapsed |