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US4400217A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of manufacturing reinforced fibers for mineral structural materials, and a structural element of a fiber-reinforced mineral structural material

Assignee: Individual
•
Filing: 1982-01-17
•
Granted: 1983-08-23
•
Expires: 2002-01-17
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Abstract

Abstract A method of manufacturing reinforcing fibers for a hydraulic binding material, to be used as an initial material for structural elements comprises the steps of providing a plurality of plant fibers and mineralizing the plant fibers. The mineralizing step includes opening the capilaries of the plant fibers, drying the same, impregnating the plant fibers with a lime water suspension, soaking the plant fibers with a formaldehyde-containing water glass solution, and intermediately drying the plant fibers between the impregnating and soaking steps. The plant fibers, after the drying, can be first impregnated with a lime water suspension, then dried, and after this soaked with a formaldehyde-containing water glass solution. It is also possible that the plant fibers, after drying, can be first soaked with a formaldehyde-containing water glass solution, then dried and after this impregnated with a lime water suspension. A structural element has a body of a hydraulic binding material, and a plurality of reinforcing fibers which are formed as mineralized plant fibers.

Inventors

  • 👤 Harald Kober

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 04:21
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/04; C; C04; C04B; C04B18/00; C04B18/04; C04B18/18; C04B18/24; C04B18/28; E04C2/06; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T428/4935

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 96 words
A structural element, such as a pipe, a plate and the like, comprising a body of hydraulic binding material; and a plurality of reinforcing fibers, said reinforcing fibers being mineralized plant fibers manufactured by the method comprising the steps of providing a plurality of plant fibers having capillaries; and mineralizing the plant fibers by opening the capillaries of the plant fibers, drying the plant fibers, impregnating the plant fibers with a lime water suspension, soaking the plant fibers with a formaldehyde-containing water glass solution, and intermediately drying the plant fibers between said impregnating and soaking steps.
Claim 2
Dependent Claim 96 words
A structural element, such as a pipe, a plate and the like, comprising a body of hydraulic binding material; and a plurality of reinforcing fibers, said reinforcing fibers being mineralized plant fibers manufactured by the method comprising the steps of providing a plurality of plant fibers having capillaries; and mineralizing the plant fibers by opening the capillaries of the plant fibers, drying the plant fibers, impregnating the plant fibers with a lime water suspension, soaking the plant fibers with a formaldehyde-containing water glass solution, and intermediately drying the plant fibers between said impregnating and soaking steps.
Claim 3
Dependent Claim 19 words
A structural element as defined in claim 1, wherein said hydraulic binding material is a cement containing structural material.
Claim 4
Dependent Claim 19 words
A structural element as defined in claim 1, wherein said hydraulic binding material is a gypsum containing structural material.
Claim 5
Dependent Claim 24 words
A structural element as defined in claim 1, wherein said plant fibers have capillaries and cell walls which are strengthened by a calcium silicate.
Claim 6
Dependent Claim 22 words
A structural element as defined in claim 4, wherein the calcium silicate coats said capillaries and cell walls of said plant fibers.
Claim 7
Dependent Claim 15 words
A structural element as defined in claim 1, wherein said plant fibers are stalk fibers.
Claim 8
Dependent Claim 15 words
A structural element as defined in claim 6, wherein said plant fibers are flax fibers.
Claim 9
Dependent Claim 47 words
A structural element as defined in claim 1, particularly for a not supporting use, wherein said hydraulic binding material and said mineralized plant fibers have a predetermined total weight in mixed condition, said mineralized plant fibers having a weight substantially equal to 5% of said total weight.
Claim 10
Dependent Claim 46 words
A structural element as defined in claim 1, particularly for a supporting use, wherein said hydraulic binding material and said mineralized plant fibers have a predetermined total weight in mixed condition, said mineralized plant fibers having a weight substantially not exceeding 12% of said total weight.

References Cited (Backward Citations)

GB259636A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1986-08-22 1987-02-21 1987-08-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1990-08-22 1991-02-21 1991-08-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1994-08-22 1995-02-21 1995-08-23 $7700.00 Window Closed / Lapsed

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