Patent US2143603A successfully refreshed from Google Patents.
Patent US3266097A successfully refreshed from Google Patents.
US3266097A
Expired / Lapsed
US
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Extrusion apparatus
Assignee: Phillips Petroleum Co
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Filing: 1964-08-13
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Granted: 1966-08-16
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Expires: 1984-08-13
Abstract
No abstract record available.
Inventors
- 👤 Olaf E Larsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:50
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/465; B29C48/467; B29C48/03; B29C48/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
PLASTICIZING MEANS FOR PREPARING A PLASTIC MASS FOR EXTRUSION, COMPRISING: A BODY HAVING AN ELONGATED, GENERALLY CIRCULAR CROSS SECTION OPENING THERETHROUGH; AND A DISPRESION MANDREL IN SAID OPENING SAID MANDRAL COMPRISING A CENTRAL CORE FORMING AN ANNULAR PASSAGE IN SAID OPENING BETWEEN SAID BODY AND SAID CORE, AND A PLURALITY OF TEETH CIRCUMFERENTIALLY SPACED ON SAID CORE AND EXTENDING OUTWARDLY THEREFROM SUBSTANTIALLY THROUGH SAID ANNULAR PASSAGE, EACH OF SAID TEETH BEING INCLINED FROM SAID CORE TOWARD SAID BODY IN THE DIRECTING OF FLOW OF SAID PLASTIC MASS THERETHROUGH, SAID TEETH BEING POSITIONED IN AT LEAST TWO TRANSVERSE ROWS SPACED LONGITUDINALLY ALONG SAID CORE, AN UPSTREAM ROW AND A DOWNSTREAM ROW, THE CIRCUMFERENTIAL SPACING BETWEEN TEETH BEING SMALLER IN SAID DOWNSTREAM ROW THAN IN SAID UPSTREAM ROW,
Claim 2
Dependent Claim
126 words
PLASTICIZING MEANS FOR PREPARING A PLASTIC MASS FOR EXTRUSION, COMPRISING: A BODY HAVING AN ELONGATED, GENERALLY CIRCULAR CROSS SECTION OPENING THERETHROUGH; AND A DISPRESION MANDREL IN SAID OPENING SAID MANDRAL COMPRISING A CENTRAL CORE FORMING AN ANNULAR PASSAGE IN SAID OPENING BETWEEN SAID BODY AND SAID CORE, AND A PLURALITY OF TEETH CIRCUMFERENTIALLY SPACED ON SAID CORE AND EXTENDING OUTWARDLY THEREFROM SUBSTANTIALLY THROUGH SAID ANNULAR PASSAGE, EACH OF SAID TEETH BEING INCLINED FROM SAID CORE TOWARD SAID BODY IN THE DIRECTING OF FLOW OF SAID PLASTIC MASS THERETHROUGH, SAID TEETH BEING POSITIONED IN AT LEAST TWO TRANSVERSE ROWS SPACED LONGITUDINALLY ALONG SAID CORE, AN UPSTREAM ROW AND A DOWNSTREAM ROW, THE CIRCUMFERENTIAL SPACING BETWEEN TEETH BEING SMALLER IN SAID DOWNSTREAM ROW THAN IN SAID UPSTREAM ROW,
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |