US2613758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Baffle type muffler with sound absorbing material
Assignee: Individual
•
Filing: 1949-12-19
•
Granted: 1952-10-14
•
Expires: 1969-12-19
Abstract
No abstract record available.
Inventors
- 👤 Cullum Douglas Jack Wayth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:55
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/08; F01N1/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1067200A
Cited
US1709333A
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US1811762A
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US1847830A
Cited
US2017744A
Cited
US2373231A
Cited
US2523260A
Cited
US2514996A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-14 | 1956-04-14 | 1956-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-14 | 1960-04-14 | 1960-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-14 | 1964-04-14 | 1964-10-14 | $7700.00 | Window Closed / Lapsed |