Patent US2583366A successfully refreshed from Google Patents.
US2583366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Muffler with perforated cylinder containing inwardly and rearwardly inclined holes
Assignee: Individual
•
Filing: 1948-02-09
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Granted: 1952-01-22
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Expires: 1968-02-09
Abstract
No abstract record available.
Inventors
- 👤 Willard H Engels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:40
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE561675C
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US1811762A
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US1927213A
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US2065343A
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GB379563A
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FR782848A
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GB469155A
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GB461065A
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US2073951A
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GB512075A
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US2233804A
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US2241150A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-21 | 1955-07-23 | 1956-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-21 | 1959-07-23 | 1960-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-21 | 1963-07-23 | 1964-01-22 | $7700.00 | Window Closed / Lapsed |