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US3913309A Expired / Lapsed US ⏱️ 0.0 years remaining

Fibrous composition of matter

Assignee: Individual
•
Filing: 1971-03-11
•
Granted: 1975-10-21
•
Expires: 1991-03-11
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Abstract

Abstract An ignifuge or fire resistant intimate blend of fibres in the form of a composite yarn, a woven fabric made of such composite yarns, a non-woven fabric and textile articles obtained therefrom. The fibres are selected among glass fibres or ceramic fibres surrounded by at least two different kinds of fibres selected among synthetic and/or natural fibres. One of such two fibres has a melting point different from the other of the two fibres and both of the two fibres have melting points lower than the melting point of the glass or ceramic fibre wool and chlorovinyl fibres are among the preferred fibres surrounding the glass fibres. During the melting of the fibres surrounding the glass fibre, at least a partial disintegration thereof takes place and a carbonous deposit is formed on the glass fibres protecting them from heat and increasing heat resistant properties thereof.

Inventors

  • 👤 Nereo Chiarotto

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 12:00
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/02; D02G3/16; D02G3/18; D02G3/182; D02G3/185; C; C04; C04B; C04B30/00; C04B30/02; D02G3/44; D02G3/443; D03; D03D; D03D15/00; D03D15/50; D03D15/513; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4209; D04H1/4218; D04H1/4266; D04H1/4282; D04H1/4291; D04H1/43; D04H1/4326; D04H1/4334; D04H1/435; D04H1/4382; D04H1/43825; D04H1/43828; D04H1/43835; D04H1/54; D04H1/541; D04H1/5412; D04H1/5418; D04H1/542; D04H1/551; D04H1/43838; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10S; Y10S57/00; Y10S57/904

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 59 words
A COMPOSITE YARN WHICH EXHIBITS FIRE RESISTANT PROPERTIES DUE TO THERMAL DECOMPOSITION, SAID YARN COMPRISING A GLASSFIBER CORE, A CARBONIZABLE COATING FOR SAID CORE CONSISTING OF A BLEND OF A NATURAL ANIMAL FIBER WITH A SYNTHETIC FIBER, SAID COATING EXHIBITING THERMAL DECOMPOSITION, UPON BEING SUBJECTED TO HIGH TEMPERATURES, AND FORMING A SUBSTANTIALLY CARBONACEOUS RESIDUE RENDERING THE YARN FIRE RESISTANT.
Claim 2
Dependent Claim 59 words
A COMPOSITE YARN WHICH EXHIBITS FIRE RESISTANT PROPERTIES DUE TO THERMAL DECOMPOSITION, SAID YARN COMPRISING A GLASSFIBER CORE, A CARBONIZABLE COATING FOR SAID CORE CONSISTING OF A BLEND OF A NATURAL ANIMAL FIBER WITH A SYNTHETIC FIBER, SAID COATING EXHIBITING THERMAL DECOMPOSITION, UPON BEING SUBJECTED TO HIGH TEMPERATURES, AND FORMING A SUBSTANTIALLY CARBONACEOUS RESIDUE RENDERING THE YARN FIRE RESISTANT.
Claim 3
Dependent Claim 28 words
The composite yarn of claim 1, wherein said glass fiber is selected from the group consisting of beta glass fibers, common glass fibers, ceramic fibers and mixtures thereof.
Claim 4
Dependent Claim 27 words
The composite yarn of claim 1, wherein said natural fiber is selected from the group consisting of wool fibers, silk fibers, artificial proteic fibers and mixtures thereof.
Claim 5
Dependent Claim 30 words
The composite yarn of claim 1, wherein said synthetic fiber is selected from the group consisting of polyvinylchloride fibers, polyamide fibers, modacrylic fibers, polyester fibers, polyacrylonitrilic fibers and mixtures thereof.
Claim 6
Dependent Claim 32 words
The composite yarn of claim 1, wherein said glass fiber core consists of a filament of beta glass and said coating consists of an intimate blend of polyvinylchloride fibers and wool fibers.
Claim 7
Dependent Claim 27 words
The composite yarn of claim 5, wherein said glass filament is wrapped by said polyvinylchloride fibers and wool fibers which form a tube-like coating for said filament.
Claim 8
Dependent Claim 19 words
The composite yarn of claim 5, wherein the weight ratio glass fibers: polyvinylchloride fibers: wool fibers is approximately 100:40:60.
Claim 9
Dependent Claim 9 words
A fabric made of composite yarn of claim 1.

References Cited (Backward Citations)

US3297405A Cited
US3527564A Cited
US3572397A Cited
US3617220A Cited
US3716332A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-10-20 1979-04-21 1979-10-21 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-10-20 1983-04-21 1983-10-21 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-10-20 1987-04-21 1987-10-21 $7700.00 Window Closed / Lapsed

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