US3244785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing a composite sheath-core filament
Assignee: EIDP Inc
•
Filing: 1962-12-31
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Granted: 1966-04-05
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Expires: 1982-12-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles Jarma Hollandsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:13
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/28; D01D5/30; D01D5/34; D01F; D01F8/00; D01F8/04; D01F8/12; Y; Y10; Y10S; Y10S264/00; Y10S264/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
IN THE PRODUCTION OF COMPOSITE FILAMENTS HAVING A CORE DISPOSED ECCENTRICALLY WITHIN A SHEATH, THE STEPS OF: DISCHARGING A FIRST VISCOUS FIBER-FORMING POLYMERIC MATERIAL UNDER PRESSURE INTO TWO SEPARATE FLOW PASSAGES IN A SPINNERET; DISCHARGING A SECOND VISCOUS FIBER-FORMING POLYMERIC MATERIAL INTO ONE OF SAID PASSAGES, AXIALLY THEREOF, AS A CORE; AND SPINNING THE MATERIALS FLOWING THROUGH SAID PASSAGES IN SIDE-BY-SIDE RELATIONSHIP, THUS FORMING ONE OF SAID COMPOSITE FILAMENTS.
Claim 2
Dependent Claim
69 words
IN THE PRODUCTION OF COMPOSITE FILAMENTS HAVING A CORE DISPOSED ECCENTRICALLY WITHIN A SHEATH, THE STEPS OF: DISCHARGING A FIRST VISCOUS FIBER-FORMING POLYMERIC MATERIAL UNDER PRESSURE INTO TWO SEPARATE FLOW PASSAGES IN A SPINNERET; DISCHARGING A SECOND VISCOUS FIBER-FORMING POLYMERIC MATERIAL INTO ONE OF SAID PASSAGES, AXIALLY THEREOF, AS A CORE; AND SPINNING THE MATERIALS FLOWING THROUGH SAID PASSAGES IN SIDE-BY-SIDE RELATIONSHIP, THUS FORMING ONE OF SAID COMPOSITE FILAMENTS.
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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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |