US3133612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound deadening laminated engine exhaust pipe
Assignee: Old Carco LLC
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Filing: 1960-07-06
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Granted: 1964-05-19
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Expires: 1980-07-06
Abstract
No abstract record available.
Inventors
- 👤 John W Sailler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:15
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/14; B; B60; B60K; B60K13/00; B60K13/04; F01N2470/00; F01N2470/12; F01N2470/24
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
91 words
AN EXHAUST PIPE FOR CONVEYING EXHAUST GASES FROM THE EXHAUST MANIFOLD OF AN INTERNAL COMBUSTION ENGINE TO A MUFFLER THEREFOR COMPRISING AN INNER METALLIC TUBE, AN OUTER METALLIC TUBE SURROUNDING SAID INNER TUBE AND HAVING ITS WALL SPACED FROM THE WALL OF SAID INNER TUBE TO PROVIDE A SURROUNDING SOUND DEADENING AIR SPACE THEREBETWEEN DORMANT DURING CONVEYANCE OF SAID GASES AND EXTENDING SUBSTANTIALLY CONTINUOUSLY OVER THE MAJOR LENGTH OF SAID PIPE, AND AN ENLARGED PORTION AT THE OPPOSITE ENDS OF SAID INNER TUBE INTERNALLY IN PRESSURE CONTACT WITH THE OUTER TUBE.
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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) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |