US4414031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber-containing products made with hydraulic binder agents
Assignee: Ametex AG
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Filing: 1982-03-19
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Granted: 1983-11-08
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Expires: 2002-03-19
Abstract
Abstract To reinforce products made from hydraulic binder agents, fibers of polymerized acrylic nitrile, which are manufactured with a molar concentration of acrylic nitrile units of at least 98%, are used. The fibers advantageously have a strength of at least 50 cN/tex and a breaking elongation of at most 15%. These fibers produce a product after setting having good bending tensile strength and excellent impact strength.
Inventors
- 👤 Josef Studinka
- 👤 Peter E. Meier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:57
CPC Classifications
C; C04; C04B; C04B16/00; C04B16/04; C04B16/06; C04B16/0616; C04B16/065; C04B16/0658; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1372
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
45 words
Solid, fiber-containing products manufactured with hydraulic binder agents, characterized in that they contain fibers of polymerized acrylic nitrile as reinforcement fibers having a molar concentration of acrylic nitrile units of from 98 to 100%, which maintain their strength characteristics during and after the setting process.
Claim 2
Dependent Claim
45 words
Solid, fiber-containing products manufactured with hydraulic binder agents, characterized in that they contain fibers of polymerized acrylic nitrile as reinforcement fibers having a molar concentration of acrylic nitrile units of from 98 to 100%, which maintain their strength characteristics during and after the setting process.
Claim 3
Dependent Claim
27 words
Product according to patent claim 1, characterized in that the fibers have a strength of at least 50 cN/tex and a breaking elongation of at most 15%.
Claim 4
Dependent Claim
21 words
Product according to patent claim 1, characterized in that the fibers have a uniform length of from 3 to 24 mm.
Claim 5
Dependent Claim
21 words
Product according to patent claim 1, characerized in that the fibers have a non-uniform length range of up to 30 mm.
Claim 6
Dependent Claim
19 words
Product according to claim 1, characterized in that the fibers have a titer of from 0.1 to 15 dtex.
Claim 7
Dependent Claim
22 words
Product according to claim 1 in the form of plates, corrugated plates, pipes and shaped elements, particularly those intended for construction purposes.
Claim 8
Dependent Claim
85 words
Method for the manufacture of the products according to patent claim 1, characterized in that the hydraulic binder agent is mixed together with water, the usual supplemental and additive materials and with fibers of polymerized acrylic nitrile having a molar concentration of acrylic nitrile units of from 98 to 100% as reinforcing fibers which maintain their strength characteristics during and after the setting process, and in that the mixture is then partially drained, if desired, and brought into the desired shape and allowed to set.
Claim 9
Dependent Claim
27 words
Method according to patent claim 7, characterized in that the fibers have a strength of at least 50 cN/tex and a breaking elongation of at most 15%.
Claim 10
Dependent Claim
21 words
Method according to patent claim 7, characterized in that the fibers have a uniform length of from 3 to 24 mm.
Claim 11
Dependent Claim
21 words
Method according to patent claim 7, characterized in that the fibers have a nonuniform length range of up to 30 mm.
Claim 12
Dependent Claim
14 words
Method according to claim 7, characterized in that the fibers are stretched multiple times.
Claim 13
Dependent Claim
19 words
Method according to patent claim 9, characterized in that the fibers are first treated by a fibrillating milling process.
Claim 14
Dependent Claim
19 words
Method according to claim 8, characterized in that the fibers have a titer of from 0.1 to 15 dtex.
Claim 15
Dependent Claim
17 words
Method according to claim 8, characterized in that the mixture is partially drained prior to the shaping.
Claim 16
Dependent Claim
25 words
Method according to claim 8, characterized in that the mixture is formed into plates, corrugated plates, pipes and shaped elements, particularly intended for construction purposes.
Claim 17
Dependent Claim
18 words
Product according to claim 4, characterized in that the fibers are first treated by a fibrillating milling process.
Claim 18
Dependent Claim
16 words
The method of claim 10 wherein the fibers are first treated by a fibrillating milling process.
Claim 19
Dependent Claim
15 words
The method of claim 7 wherein the fibers are stretched multiple times and then thermo-fixed.
Claim 20
Dependent Claim
34 words
The method of claim 14 wherein the method of drainage is selected from the group consisting of the winding machine method, circular screen method, longitudinal screen method, injection system method and filter press method.
Claim 21
Dependent Claim
18 words
The method of claim 14 wherein the mixture is worked in accordance with a continuous single strand process.
Claim 22
Dependent Claim
18 words
The method of claim 8 wherein the mixture is worked in accordance with a continuous single strand process.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |