US3609808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion die
Assignee: BASF SE
•
Filing: 1969-12-03
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Granted: 1971-10-05
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Expires: 1989-12-03
Abstract
Abstract AN EXTRUSION DIE FOR FEEDING A COMPRESSED PLASTICS MELT INTO A ZONE OF LOW PRESSURE FOR THE PURPOSE OF DEGASSING WHICH CONSISTS OF A PLURALITY OF TUBULAR DIES ARRANGED COAXIALLY ABOUT A CENTRAL PIN, THE SAID TUBULAR DIES BEING FITTED INTO ONE ANOTHER AND BEING SUPPORTED BY ONE ANOTHER, BY THE CENTRAL PIN AND BY THE DIE CASING VIA SUPPORTING MEANS LOCATED IN ANNULAR GROOVES IN THE TUBULAR DIES.
Inventors
- 👤 Hans-Rudolf Jacobi
- 👤 Hans Eisenhardt
- 👤 Horst Hoyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:43
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/76; B29C48/765; B29C48/766; B29C48/03; B29C48/09; B29C48/10; B29C48/30; B29C48/345; B29C48/11
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) | 1974-10-04 | 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 |