Patent US5550878A successfully refreshed from Google Patents.
Patent US3381774A successfully refreshed from Google Patents.
US3381774A
Expired / Lapsed
US
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Muffler with interconnected end bells and telescoped inner pipe
Assignee: MERCURY METAL PRODUCTS Inc
•
Filing: 1967-07-10
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Granted: 1968-05-07
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Expires: 1987-07-10
Abstract
No abstract record available.
Inventors
- 👤 Stade Bertil
- 👤 Edward H Hoglund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:16
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N13/1838; F01N1/00; F01N1/08; F01N1/083; F01N13/1844; F01N13/185; F01N13/1888; F01N13/1894; F01N2260/00; F01N2260/18; F01N2450/00; F01N2450/20; F01N2450/22; F01N2470/00; F01N2470/02; F01N2490/00; F01N2490/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2019746A
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US2274459A
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US2416452A
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US2511597A
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FR1060334A
Cited
US3233698A
Cited
US3323613A
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US3313373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |