US3020588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary plastic extrusion die
Assignee: Union Carbide Corp
•
Filing: 1958-02-04
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Granted: 1962-02-13
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Expires: 1978-02-04
Abstract
No abstract record available.
Inventors
- 👤 Joe S Ferguson
- 👤 Garland E Raley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:32
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/32; B29C48/33; B29C48/03; B29C48/09; B29C48/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
49 words
APPARATUS FOR PRODUCING TUBING FROM THERMOPLASTIC MATERIAL COMPRISING AN EXTRUDER HAVING A STATIONARY NIPPLE WITH A CONICAL STATIONARY INNER SURFACE, A DIE JOURNALED ON SAID NIPPLE HAVING A ROTATIVE CONE SPACED INSIDE SAID STATIONARY CONICAL SURFACE AND A DIVERGING ROTATIVE SURFACE SPACED FROM SAID CONE AND FORMING A PROJEC-
References Cited (Backward Citations)
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Cited
US2697852A
Cited
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US2937402A
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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) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |