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US3792985A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of making glass-metal fiber composites

Assignee: Owens Corning
•
Filing: 1971-08-19
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Granted: 1974-02-19
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Expires: 1991-08-19
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Abstract

Abstract Composites of glass reinforced by metal fibers are made by fusing glass coated metal fibers together. The coated fibers may be made by drawing a fiber through a tube of the glass and softening a narrow band of the glass tube around the fiber as the fiber is pulled from the tube. Glass-metal fibers so produced are arranged next to one another, and the glass is fused together at a temperature above the annealing point of the glass and approximately at the softening point of the glass. In the case of boron fibers, the fibers are kept at a temperature desirably below 1,650*F. as the composite is being prepared. The composites of the invention include boron, tungsten, or molybdenum fibers in glass. Procedures given can also produce composites with stainless steel, or carbon steel fibers.

Inventors

  • 👤 A Siefert
  • 👤 F Sens

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 18:52
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/02; C03B37/025; C03B37/026; C03C; C03C14/00; C03C14/002; C04; C04B; C04B35/00; C04B35/71; C04B35/74; C04B35/76; C03C2214/00; C03C2214/02; C03C2214/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49801

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 79 words
The process of producing boron fiber reinforced refractory composites comprising: pulling an otherwise unheated boron fiber through a glass tube that is softened by the impingement of a narrow band of gas flame on the outside of the tube to cause a thin sheet of glass to flow onto the fiber moving therethrough, said glass having a coefficient of expansion of less than approximately 33 X 10 7 per degree Centigrade and the following composition in percent by weight:
Claim 2
Dependent Claim 23 words
The method of claim 2 wherein the glass has approximately the following composition in mol percentages: 75.0 SiO2, 12.5 Cu2O, and 12.5 Al2O3.
Claim 3
Dependent Claim 13 words
The method of claim 2 wherein the glass is a devitrifiable alumina-titania-silicate glass.
Claim 4
Dependent Claim 29 words
The method of claim 2 wherein the glass has approximately the following weight composition: SiO2, 70.7; Na2O, 0.2; Al2O3, 17.8; ZnO, 1.4; TiO2, 4.18; MgO, 3.15; and Li2O, 2.38.
Claim 5
Dependent Claim 85 words
The method of claim 1 wherein the glass has the following composition in approximate percentages by weight: from 40% to 80% of SiO2, from 10% to 35% of Al2O3 and/or B2O3, from 2% to 20% of a nucleating agent from the group consisting of TiO2, ZrO2, V2O5, CoO, NiO, MoO3, Fe2O3 and ThO2; from 2% to 30% of a basic oxide from the group consisting of Li2O, BeO, MgO, CaO, ZnO, SrO, CdO, BaO, PbO, MnO, FeO; and less than 3% of Na2O and K2O.
Claim 6
Dependent Claim 13 words
The boron fiber reinforced glass composite produced by the method of claim 1.

References Cited (Backward Citations)

US3241934A Cited
US3451847A Cited
US3491055A Cited
US3473999A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-02-18 1977-08-20 1978-02-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-02-18 1981-08-20 1982-02-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-02-18 1985-08-20 1986-02-19 $7700.00 Window Closed / Lapsed

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