US3159239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Muffler
Assignee: Walker Manufacturing Co
•
Filing: 1962-05-11
•
Granted: 1964-12-01
•
Expires: 1982-05-11
Abstract
No abstract record available.
Inventors
- 👤 Peter G Andrews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:51
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N13/1838; F01N2450/00; F01N2450/22; F01N2470/00; F01N2470/18; F01N2490/00; F01N2490/08; F01N2490/16; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49398
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
92 words
A MUFFLER COMPRISING A TUBULAR SHELL HAVING A HEMISPHERICAL SURFACE FORMED ON ONE END, AN END FITTING AT SAID ONE END AND HAVING AN ARCUATE SURFACE OF SUBSTANTIALLY IDENTICAL RADIUS OF CURVATURE AS SAID HEMISPHERICAL SURFACE AND SEALINGLY MATING THEREWITH, SAID END FITTING HAVING A BUSHING FORMED THEREIN FOR ATTACHMENT TO A CONDUIT TO CONNECT THE MUFFLER IN AN EXHAUST GAS SYSTEM, AN ANNULAR WELD AT THE JOINT BETWEEN SAID SURFACES AND RIGIDLY HOLDING THEM TOGETHER, AN END FITTING AT THE OTHER END OF THE SHELL, AND SILENCING MEANS INSIDE THE SHELL.
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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) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |