US3134457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine exhaust muffler
Assignee: 3M Co
•
Filing: 1960-09-01
•
Granted: 1964-05-26
•
Expires: 1980-09-01
Abstract
No abstract record available.
Inventors
- 👤 Manley C Marcellus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:17
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N1/00; F01N1/08; F01N13/009; F01N13/0097; F01N13/011; F01N13/017; F01N13/16; F01N13/1888; F01N13/1894; F01N2260/00; F01N2260/18; F01N2310/00; F01N2310/02; F01N2330/00; F01N2330/02; F01N2450/00; F01N2450/22; F01N2450/24; F01N2450/30; F01N2470/00; F01N2470/10; F01N2530/00; F01N2530/02; Y; Y10; Y10S; Y10S55/00; Y10S55/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
IN AN AUTOMOBILE EXHAUST MUFFLER, IN COMBINATION, A CASING, INLET AND OUTLET MEANS CONNECTED WITH OPPOSITE SIDES OF SAID CASING, AND MEANS RETAINING GAS-PERMEABLE PACKING IN SAID CASING FOR TRAVERSE BY EXHAUST GASES BETWEEN SAID INLET AND OUTLET MEANS, SAID PACKING CONSISTING ESSENTIALLY OF MULTILAYERS OF FLEXIBLE CORRUGATED AND FLAT MICA SHEETS WHICH ARE STABLE AT TEMPERATURE UP TO AT LEAST ABOUT 600*C. PROVIDING A PLURALITY OF ORDERED PASSAGEWAYS OF RELATIVELY LARGE LENGTH-DIAMETER RATIO FORMED BY THE SAID CORRUGATED AND FLAT MICA SHEETS IN ADJACENT LAYERS, THE SAID PASSAGEWAYS BEING DISPOSED SO AS TO REQUIRE EFFECTIVE CROSS-FLOW OF THE EXHAUST GASES FROM SAID INLET MEANS TO SAID OUTLET MEANS.
Claim 2
Dependent Claim
109 words
IN AN AUTOMOBILE EXHAUST MUFFLER, IN COMBINATION, A CASING, INLET AND OUTLET MEANS CONNECTED WITH OPPOSITE SIDES OF SAID CASING, AND MEANS RETAINING GAS-PERMEABLE PACKING IN SAID CASING FOR TRAVERSE BY EXHAUST GASES BETWEEN SAID INLET AND OUTLET MEANS, SAID PACKING CONSISTING ESSENTIALLY OF MULTILAYERS OF FLEXIBLE CORRUGATED AND FLAT MICA SHEETS WHICH ARE STABLE AT TEMPERATURE UP TO AT LEAST ABOUT 600*C. PROVIDING A PLURALITY OF ORDERED PASSAGEWAYS OF RELATIVELY LARGE LENGTH-DIAMETER RATIO FORMED BY THE SAID CORRUGATED AND FLAT MICA SHEETS IN ADJACENT LAYERS, THE SAID PASSAGEWAYS BEING DISPOSED SO AS TO REQUIRE EFFECTIVE CROSS-FLOW OF THE EXHAUST GASES FROM SAID INLET MEANS TO SAID OUTLET MEANS.
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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) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |