US3679541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheath/core bicomponent filaments and process of preparing same
Assignee: Imperial Chemical Industries Ltd
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Filing: 1970-07-20
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Granted: 1972-07-25
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Expires: 1990-07-20
Abstract
Abstract SHEATH/CORE BICOMPONENT FILAMENTS HAVING A CORE DERIVED FROM A FIBRE-FORMING LINEAR POLYAMIDE OR COPOLYAMIDE AND A SHEATH DERIVED FROM A COPOLYESTER OR COPOLYAMIDE CONTAINING POLY (ALKYLENE OXIDE) RADICALS.
Inventors
- 👤 Anthony Charles Davis
- 👤 Ian Stuart Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:06
CPC Classifications
D; D01; D01F; D01F8/00; Y; Y10; Y10S; Y10S264/00; Y10S264/26; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969
Claims Analysis
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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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |