Patent US3248791A successfully refreshed from Google Patents.
US3248791A
Expired / Lapsed
US
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Method of manufacturing a muffler including coating with ceramic
Assignee: Walker Manufacturing Co
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Filing: 1962-12-04
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Granted: 1966-05-03
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Expires: 1982-12-04
Abstract
No abstract record available.
Inventors
- 👤 Walter H Powers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:50
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N13/1838; F01N13/1844; F01N13/185; F01N2310/00; F01N2310/02; F01N2310/06; F01N2450/00; F01N2450/20; F01N2450/22; F01N2470/00; F01N2470/02; F01N2470/06; F01N2470/10; F01N2510/00; F01N2510/08; F01N2530/00; F01N2530/02; F01N2530/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49398; Y10T29/49826; Y10T29/49888; Y10T29/4998; Y10T29/49993
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
THE METHOD OF MAKING MUFFLERS COMPRISING THE STEPS OF FORMING THE COMPONENT PARTS OF A MUFFLER INCLUDING A SHELL, END HEADERS, AND INTERNAL SILENCING STRUCTURE, INTERLOCKING THE END HEADERS WITH THE ENDS OF THE SHELL AFTER THE INTERNAL SILENCING STRUCTURE HAS BEEN INSERTED AND ASSEMBLED WITHIN THE SHELL, FORMING THE INTERLOCKED JOINT BETWEEN THE END OF THE SHELL AND ONE OF THE HEADERS SO A PORTION THEREOF IS NO LARGER IN DIAMETER THAN THE SHELL WHEREBY LOCK-SEAMING EQUIPMENT CAN MOVE OVER SAID END OF THE SHELL, IMMERSING THE ASSEMBLED MUFFLER IN A CERAMIC SLIP, DRAINING THE SLIP FROM THE MUFFLER, FIRING THE COATED MUFFLER TO HARDEN AS A COATING ON ALL SURFACS OF THE MUFFLER, AND APPLYING A NON-COATED LAYER TO THE OUTER SURFACE OF THE SHELL OVER SAID INTERLOCKED JOINT, AND LOCKSEAMING SAID NON-COATED LAYER.
Claim 2
Independent Claim
136 words
THE METHOD OF MAKING MUFFLERS COMPRISING THE STEPS OF FORMING THE COMPONENT PARTS OF A MUFFLER INCLUDING A SHELL, END HEADERS, AND INTERNAL SILENCING STRUCTURE, INTERLOCKING THE END HEADERS WITH THE ENDS OF THE SHELL AFTER THE INTERNAL SILENCING STRUCTURE HAS BEEN INSERTED AND ASSEMBLED WITHIN THE SHELL, FORMING THE INTERLOCKED JOINT BETWEEN THE END OF THE SHELL AND ONE OF THE HEADERS SO A PORTION THEREOF IS NO LARGER IN DIAMETER THAN THE SHELL WHEREBY LOCK-SEAMING EQUIPMENT CAN MOVE OVER SAID END OF THE SHELL, IMMERSING THE ASSEMBLED MUFFLER IN A CERAMIC SLIP, DRAINING THE SLIP FROM THE MUFFLER, FIRING THE COATED MUFFLER TO HARDEN AS A COATING ON ALL SURFACS OF THE MUFFLER, AND APPLYING A NON-COATED LAYER TO THE OUTER SURFACE OF THE SHELL OVER SAID INTERLOCKED JOINT, AND LOCKSEAMING SAID NON-COATED LAYER.
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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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |