US3198284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Muffler
Assignee: Walker Manufacturing Co
•
Filing: 1961-09-06
•
Granted: 1965-08-03
•
Expires: 1981-09-06
Abstract
No abstract record available.
Inventors
- 👤 Walter H Powers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:28
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N13/1872; F01N1/00; F01N1/02; F01N13/1838; F01N13/1844; F01N13/185; F01N13/1888; F01N2450/00; F01N2450/20; F01N2450/22; F01N2450/24; F01N2470/00; F01N2470/02; F01N2470/06; F01N2470/10; F01N2470/18; F01N2490/00; F01N2490/15; F01N2490/155; F01N2590/00; F01N2590/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A LAWN MOWER MUFFLER COMPRISING A RELATIVELY SMALL BOX-LIKE CASING, MEANS IN SAID CASING PROVIDING AN INLET CHAMBER, MEANS IN SAID CASING PROVIDING A RESONATOR CHAMBER, MEANS IN SAID CASING PROVIDING A SPIT CHAMBER AND MEANS IN SAID CASING PROVIDING A TRI-FLOW PASSAGE SEPARATING THE RESONATOR CHAMBER FROM THE SPIT CHAMBER AND HAVING COMMUNICATION WITH THE SPIT CHAMBER AND OPENING INTO THE INLET CHAMBER.
Claim 2
Dependent Claim
64 words
A LAWN MOWER MUFFLER COMPRISING A RELATIVELY SMALL BOX-LIKE CASING, MEANS IN SAID CASING PROVIDING AN INLET CHAMBER, MEANS IN SAID CASING PROVIDING A RESONATOR CHAMBER, MEANS IN SAID CASING PROVIDING A SPIT CHAMBER AND MEANS IN SAID CASING PROVIDING A TRI-FLOW PASSAGE SEPARATING THE RESONATOR CHAMBER FROM THE SPIT CHAMBER AND HAVING COMMUNICATION WITH THE SPIT CHAMBER AND OPENING INTO THE INLET CHAMBER.
References Cited (Backward Citations)
US1682316A
Cited
US3125182A
Cited
US1756916A
Cited
US1822990A
Cited
US2182945A
Cited
US2484826A
Cited
US2727584A
Cited
US2902109A
Cited
US2922485A
Cited
US2934161A
Cited
US2908344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |