US3187382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion apparatus
Assignee: Ericsson Inc
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Filing: 1963-09-16
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Granted: 1965-06-08
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Expires: 1983-09-16
Abstract
No abstract record available.
Inventors
- 👤 Lowe James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:02
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/505; B29C48/03; B29C48/05; B29C48/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A SCREW FOR EXTRUDING PLASTIC MATERIAL SUBJECT TO SCORCHING DURING EXTRUSION COMPRISING: (A) A CYLINDRICAL ROOT, (B) A SHALLOW HELICAL FLUTE EXTENDING RADIALLY FROM SAID ROOT, (C) A FLAT CIRCULAR SURFACE TERMINATING THE DISCHARGE END OF SAID SCREW (A) SAID SURFACE BEING NORMAL TO THE AXIS OF SAID SCREW, AND (D) A RIDGE PROJECTING AXIALLY FROM SAID SURFACE (A) IN THE FORM OF A CHORD ACROSS SAID SURFACE APPRECIABLY DISTANT FROM THE CENTER OF SAID SURFACE.
Claim 2
Dependent Claim
76 words
A SCREW FOR EXTRUDING PLASTIC MATERIAL SUBJECT TO SCORCHING DURING EXTRUSION COMPRISING: (A) A CYLINDRICAL ROOT, (B) A SHALLOW HELICAL FLUTE EXTENDING RADIALLY FROM SAID ROOT, (C) A FLAT CIRCULAR SURFACE TERMINATING THE DISCHARGE END OF SAID SCREW (A) SAID SURFACE BEING NORMAL TO THE AXIS OF SAID SCREW, AND (D) A RIDGE PROJECTING AXIALLY FROM SAID SURFACE (A) IN THE FORM OF A CHORD ACROSS SAID SURFACE APPRECIABLY DISTANT FROM THE CENTER OF SAID SURFACE.
References Cited (Backward Citations)
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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) | 1968-06-07 | 1968-12-07 | 1969-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-07 | 1972-12-07 | 1973-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-07 | 1976-12-07 | 1977-06-08 | $7700.00 | Window Closed / Lapsed |