US3146494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extruder with reverse flow flushed breaker plate assembly
Assignee: National Rubber Machinery Co
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Filing: 1961-11-13
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Granted: 1964-09-01
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Expires: 1981-11-13
Abstract
No abstract record available.
Inventors
- 👤 Sponaugle Lloyd Blair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:27
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/69; B29C48/691; B29C48/6914; B29C48/27; B29C48/2725; B29C48/03
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
79 words
A BREAKER PLATE ASSEMBLY FOR INSERTION IN THE MATERIAL FLOW PATH OF AN EXTRUDER, SAID ASSEMBLY COMPRISING A PERFORATE FILTER PLATE HAVING PERFORATIONS THERETHROUGH ARRANGED IN CONCENTRIC CIRCLES; AND A VALVE MEMBER UPSTREAM OF SAID PLATE HAVING A RELATIVELY NARROW RADIAL FOOT CONTAINING A VENTED PASSAGE WHICH REGISTERS WITH JUST A FEW OF SUCH PERFORATIONS AT A TIME FOR REVERSE FLOW OF MATERIAL FOR DISLODGING CONTAMINANTS FILTERED THEREBY AS SAID FOOT IS ROTATED ABOUT THE AXIS OF SUCH CIRCLES.
References Cited (Backward Citations)
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US2362750A
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US2728943A
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |