Patent US3609806A successfully refreshed from Google Patents.
US3609806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Orifice plates and worm extruders containing same
Assignee: Oerlikon Barmag AG
•
Filing: 1969-05-05
•
Granted: 1971-10-05
•
Expires: 1989-05-05
Abstract
Abstract ORIFICE PLATE FOR WORM EXTRUDES AND EXTRUDERS CONTAINING SAME FOR THE HOMOGENIZATION AND TEMPERATURE UNIFORMITY OF THE MELT FLOW OF THERMOSPLASTIC MATERIALS DISCHARGED THEREFROM, CHARACTERIZED BY FLAT, DOMED OR CONICAL ORIFICE PLATE SECURED IN OR TO THE WORM CYLINDER DIRECTLY AFTER THE WORM END AND FURTHER CHARACTERIZED BY ORIFICES PARALLEL TO THE AXIS OF THE WORM CYLINDER WITH FURTHER OBLIQUE ORIFICES EXTENDING AXIALLY DIAGONALLY, IN WHICH SYSTEM THE ORIFICES AXIALLY PARALLEL TO THE WORM CYLINDER ARE ARRANGED IN EACH CASE IN THE ZONE OF RESPECTIVE ENTRANT AND DISCHARGE ENDS OF THE AXIALLY DIAGONAL ORIFICES.
Inventors
- 👤 Heinz Schippers
- 👤 Erich Lenk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:53
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/695; B29C48/70; B29C48/705; B29C48/362; B29C48/03
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |