US4248934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibre and filament mixtures containing high-shrinkage bifilar poly(mod)acrylic filaments or fibres modified with carbon black
Assignee: Bayer AG
•
Filing: 1978-07-05
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Granted: 1981-02-03
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Expires: 1998-07-05
Abstract
Abstract The invention relates to fibre or filament mixtures consisting of high shrinkage side-by-side bifilar (mod)acrylic fibres or filaments separately containing TiO 2 and carbon black and of normal fibres or filaments of polyamide, polyester, polyalkylene, poly(mod)acrylic, wool or cotton.
Inventors
- 👤 Martin Wandel
- 👤 Helmut Engelhard
- 👤 Ernst Gutschik
- 👤 Manfred Reichardt
- 👤 Geert Christoph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:47
CPC Classifications
D; D01; D01F; D01F8/00; D01F8/04; D01F8/08; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10S260/17; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2931
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
52 words
A fibre or filament mixture consisting of 0.1 to 20% by weight of high shrinkage side-by-side bifilar(mod)acrylic fibres or filaments separately containing TiO 2 and carbon black, and 99.9 to 80% by weight of normal fibres or filaments selected from the group of polyamide, polyester, polyalkene, poly(mod)acrylic, wool, cotton and mixtures thereof.
Claim 2
Dependent Claim
52 words
A fibre or filament mixture consisting of 0.1 to 20% by weight of high shrinkage side-by-side bifilar(mod)acrylic fibres or filaments separately containing TiO 2 and carbon black, and 99.9 to 80% by weight of normal fibres or filaments selected from the group of polyamide, polyester, polyalkene, poly(mod)acrylic, wool, cotton and mixtures thereof.
Claim 3
Dependent Claim
35 words
The fibre or filament mixture of claim 1, wherein the by weight ratio of said TiO 2 -containing fibre or filament side to said carbon-black-containing fibre of filament side amounts to between 90:10 and 10:90.
Claim 4
Dependent Claim
50 words
The fibre or filament mixture of claim 1, wherein the TiO 2 -content of said TiO 2 -containing fibre or filament side amounts to between 0.1 and 4% by weight, and the carbon black content of said carbon-black-containing fibre or filament side amounts to between 12.5 and 30% by weight.
Claim 5
Dependent Claim
30 words
The fibre or filament mixture of claim 1 wherein said bifilar(mod)acrylic fibres or filaments separately containing TiO 2 and carbon black have a boiling-induced shrinkage of from 10 to 50%.
Claim 6
Dependent Claim
14 words
A fibre or filament mixture according to claim 1 containing isononyl phenol polyglycol ether.
References Cited (Backward Citations)
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Cited
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US3835148A
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US3849242A
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US3821176A
Cited
US3969559A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-03 | 1984-08-04 | 1985-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-03 | 1988-08-04 | 1989-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-03 | 1992-08-04 | 1993-02-03 | $7700.00 | Window Closed / Lapsed |