US3618167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the melt extrusion of linear fiber-forming or film-forming thermoplastic polymers
Assignee: Glanzstoff AG
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Filing: 1969-02-28
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Granted: 1971-11-09
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Expires: 1989-02-28
Abstract
Abstract APPARATUS FOR THE EXTRUSION OF A HIGH MOLECULAR WEIGHT, LINEAR, THERMOPLASTIC POLYMER MELT INTO FILAMENTS, YARNS, RIBBONS, FOILS AND THE LIKE, SAID APPARATUS INCLUDING A NOZZLE PLATE IN WHICH EACH SPINNING OR EXTRUSION APERTURE IS ENCIRCLED ON THE OUTLET FACE OF THE PLATE BY A REENTRANT GROOVE MEETING WITH THE INNER WALL SURFACE OF THE APERTURE AT AN ACUTE ANGLE TO FORM A SHARP OR POINTED RIDGE, PREFERABLY AT AN APEX ANGLE OF LESS THAN 45*.
Inventors
- 👤 Hans-Joachim A Brassard
- 👤 Heinz-Josef Jutten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:34
CPC Classifications
D; D01; D01D; D01D4/00; D01D4/02; B; B29; B29C; B29C48/00; B29C48/03; B29C48/05; B29C48/25; B29C48/30; B29C48/345; B29C48/07; B29C48/08
Claims Analysis
Total Claims: 0
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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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |