US2708772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for extruding hollow articles
Assignee: Acordis UK Ltd
•
Filing: 1951-08-24
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Granted: 1955-05-24
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Expires: 1971-08-24
Abstract
No abstract record available.
Inventors
- 👤 Moncrieff Leslie John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:07
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/90; B29C48/908; B29C48/03; B29C48/09; B29C48/901; B29C48/902; B29C48/001; B29C48/0018; B29C48/0022; B29C48/10; B29C48/885; B29C48/911; B29C48/9115; B29C48/912
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
IN A PROCESS FOR THE PRODUCTION OF RIGID TUBES BY CONTINUOUSLY EXTRUDING HOT, THERMOPLASTIC MATERIAL INTO TUBULAR FORM, COOLING THE EXTRUDED TUBE AND DRAWING IT AWAY FROM THE EXTRUSION POINT BY TRACTIVE MEANS CONTACTING IT ONLY IN A REGION IN WHICH IT IS NO LONGER PLASTIC, THE STEPS WHICH COMPRISE: CONTROLLING THE CROSSSECTIONAL SHAPE AND SIZE OF THE TUBE BY DRAWING IT OVER A SHAPING MEMBER CONTACTING THE INSIDE OF THE TUBE IN A ZONE BETWEEN AND SEPARATED FROM SAID POINT AND SAID REGION; SUPPORTING THE TUBE BETWEEN SAID POINT AND SAID REGION SOLELY BY MEANS OF SAID SHAPING MEMBER, THE
Claim 2
Dependent Claim
101 words
IN A PROCESS FOR THE PRODUCTION OF RIGID TUBES BY CONTINUOUSLY EXTRUDING HOT, THERMOPLASTIC MATERIAL INTO TUBULAR FORM, COOLING THE EXTRUDED TUBE AND DRAWING IT AWAY FROM THE EXTRUSION POINT BY TRACTIVE MEANS CONTACTING IT ONLY IN A REGION IN WHICH IT IS NO LONGER PLASTIC, THE STEPS WHICH COMPRISE: CONTROLLING THE CROSSSECTIONAL SHAPE AND SIZE OF THE TUBE BY DRAWING IT OVER A SHAPING MEMBER CONTACTING THE INSIDE OF THE TUBE IN A ZONE BETWEEN AND SEPARATED FROM SAID POINT AND SAID REGION; SUPPORTING THE TUBE BETWEEN SAID POINT AND SAID REGION SOLELY BY MEANS OF SAID SHAPING MEMBER, THE
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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) | 1958-05-23 | 1958-11-22 | 1959-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-23 | 1962-11-22 | 1963-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-23 | 1966-11-22 | 1967-05-24 | $7700.00 | Window Closed / Lapsed |