US3357051A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Die for extrusion of double-wall of "tube-in-tube" type
Assignee: GNII PLASTICHESKYKH MASS
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Filing: 1967-01-09
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Granted: 1967-12-12
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Expires: 1987-01-09
Abstract
No abstract record available.
Inventors
- 👤 Zolotarevsky Jakov Juljevich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:03
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/32; B29C48/34; B29C48/03; B29C48/09; B29C48/11; B29C48/10; B29L; B29L2031/00; B29L2031/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A DIE COMPRISING A MANDRE, A BUSHING ENCIRCLING THE MANDREL TO DEFINE AN ANNULAR SPACE THEREBETWEEN, MEANS SUPPORTING SAID BUSHING AND SURROUNDING THE SAME TO DEFINE A SECOND ANNULAR SPACE WHICH ENCIRCLES THE FIRST ANNULAR SPACE, SAID BUSHING INCLUDING A LOWER END PORTION HAVING A PLURALITY OF SPACED SLOTS THEREIN ESTABLISHING COMMUNICATION BETWEEN THE ANNULAR SPACES IN RESTRICTED ZONES, AND MEANS FOR SUPPLY EXTRUDED MATERIAL INTO SAID ANNULAR SPACES TO FORM A TUBE HAVING SPACED WALLS CORRESPONDING TO SAID ANNULAR SPACES AND DEFINING RESPECTIVE CONDUITS ADAPTED FOR THE ISOLATED FLOW OF RESPECTIVE FLUIDS, AND BRIDGES CONNECTING SAID WALLS IN CORRESPONDENCE WITH SAID SLOTS.
Claim 2
Dependent Claim
103 words
A DIE COMPRISING A MANDRE, A BUSHING ENCIRCLING THE MANDREL TO DEFINE AN ANNULAR SPACE THEREBETWEEN, MEANS SUPPORTING SAID BUSHING AND SURROUNDING THE SAME TO DEFINE A SECOND ANNULAR SPACE WHICH ENCIRCLES THE FIRST ANNULAR SPACE, SAID BUSHING INCLUDING A LOWER END PORTION HAVING A PLURALITY OF SPACED SLOTS THEREIN ESTABLISHING COMMUNICATION BETWEEN THE ANNULAR SPACES IN RESTRICTED ZONES, AND MEANS FOR SUPPLY EXTRUDED MATERIAL INTO SAID ANNULAR SPACES TO FORM A TUBE HAVING SPACED WALLS CORRESPONDING TO SAID ANNULAR SPACES AND DEFINING RESPECTIVE CONDUITS ADAPTED FOR THE ISOLATED FLOW OF RESPECTIVE FLUIDS, AND BRIDGES CONNECTING SAID WALLS IN CORRESPONDENCE WITH SAID SLOTS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-11 | 1971-06-12 | 1971-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-11 | 1975-06-12 | 1975-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-11 | 1979-06-12 | 1979-12-12 | $7700.00 | Window Closed / Lapsed |