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Patent US3209438A successfully refreshed from Google Patents.
US3209438A
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US
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Muffler manufacturing method
Assignee: Walker Manufacturing Co
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Filing: 1960-10-28
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Granted: 1965-10-05
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Expires: 1980-10-28
Abstract
No abstract record available.
Inventors
- 👤 Howard L Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:57
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N13/1838; F01N2310/00; F01N2310/02; F01N2450/00; F01N2450/20; F01N2450/22; F01N2470/00; F01N2470/02; F01N2470/10; F01N2490/00; F01N2490/02; F01N2490/06; F01N2510/00; F01N2510/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49398
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
THE METHOD OF IMPROVING THE CORROSION RESISTANCE OF A MUFFLER, COMPRISING THE STEPS OF FORMING THE VARIOUS COMPONENTS OF A MUFFLER INCLUDING INLET AND OUTLET CONDUITS, FORMING DRAINAGE OPENINGS WITH CLOSURE FLAPS BY SHEARING-OUT PORTIONS OF THE INLET AND OUTLET CONDUITS LOCATED INSIDE THE MUFFLER ADJACENT TO THE ENDS OF THE MUFFLER STRUCTURE SO AS TO PROVIDE PASSAGES FOR THE IN AND OUT FLOW OF FLUIDS DURING A COATING PROCESS, ASSEMBLING THE VARIOUS MUFFLER COMPONENTS TOGETHER TO FORM A COMPLETE
Claim 2
Independent Claim
80 words
THE METHOD OF IMPROVING THE CORROSION RESISTANCE OF A MUFFLER, COMPRISING THE STEPS OF FORMING THE VARIOUS COMPONENTS OF A MUFFLER INCLUDING INLET AND OUTLET CONDUITS, FORMING DRAINAGE OPENINGS WITH CLOSURE FLAPS BY SHEARING-OUT PORTIONS OF THE INLET AND OUTLET CONDUITS LOCATED INSIDE THE MUFFLER ADJACENT TO THE ENDS OF THE MUFFLER STRUCTURE SO AS TO PROVIDE PASSAGES FOR THE IN AND OUT FLOW OF FLUIDS DURING A COATING PROCESS, ASSEMBLING THE VARIOUS MUFFLER COMPONENTS TOGETHER TO FORM A COMPLETE
References Cited (Backward Citations)
US1070736A
Cited
US2187431A
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GB507464A
Cited
US2367753A
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US2922485A
Cited
US2950777A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |