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US1671829A
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Muffler for internal-combustion engines
Assignee: ThyssenKrupp Budd Co
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Filing: 1921-03-07
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Granted: 1928-05-29
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Expires: 1941-03-07
Abstract
No abstract record available.
Inventors
- 👤 Ledwinka Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:59
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N13/1838; F01N13/1844; F01N13/1855; F01N1/00; F01N1/003; F01N1/08; F01N1/085; F01N13/1888; F01N13/1894; F01N3/00; F01N3/02; F01N3/05; F01N2260/00; F01N2260/02; F01N2450/00; F01N2450/24; F01N2470/00; F01N2470/24; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
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) | 1931-05-29 | 1931-11-28 | 1932-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-05-29 | 1935-11-28 | 1936-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-05-29 | 1939-11-28 | 1940-05-29 | $7700.00 | Window Closed / Lapsed |