US3725192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite filaments and spinneret and method for producing same
Assignee: SNIA Viscosa SpA
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Filing: 1970-08-31
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Granted: 1973-04-03
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Expires: 1990-08-31
Abstract
Abstract PRODUCTION OF A TWO-COMPONENT UNITARY FILAMENT HAVING A GIVEN UNIFORM CROSS-SECTIONAL CONFIGURATION AND COMPRISING SHEATH AND CORE PORTIONS CONSISTING OF A FIRST AND A SECOND SYNTHETIC POLYMERS RESPECTIVELY, AND PRODUCED BY SEPARATELY FLUIDIFYING SAID POLYMERS AND SIMULTANEOUSLY AND CONCURRENTLY FEEDING BOTH POLYMERS THROUGH A COMMON SPINNERET ORIFICE FOR EXTRUDING THEREFROM A COMPOSITE FILAMENTS, WHEREIN THE SAID SECOND POLYMERS FORMS A PART OF ITS CROSS-SECTION, SAID PART BEING BOTH INWARDLY AND OUTWARDLY ENCLOSED BY SAID FIRST POLYMER AND ITS MAJOR PORTION IS LOCATED OUTSIDE THE CONCENTRIC 1/2 SIMILAR SHAPE OF THE CORSS-SECTION OF THE FILAMENT.
Inventors
- 👤 S Ando
- 👤 M Matsui
- 👤 F Ogata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:03
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/28; D01D5/30; B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/304; B29C48/03; B29C48/04; B29C48/05; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2973
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |