US3869337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite non-woven mats and foam plastic articles reinforced therewith
Assignee: Bayer AG
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Filing: 1972-02-11
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Granted: 1975-03-04
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Expires: 1992-02-11
Abstract
Abstract A composite non-woven synthetic fibre mat is used for reinforcing foam plastic articles or structures. The non-woven mat consists of two non-woven fleeces being firmly bonded together. The foam plastic articles or structures are reinforced with the composite non-woven fibre mat in their marginal zones. Preferably the foam plastic is a polyurethane.
Inventors
- 👤 Peter Hoppe
- 👤 Helmut Leyer
- 👤 Johann Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:51
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4391; D04H1/43918; B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B32B5/02; B32B5/022; B32B7/00; B32B7/04; B32B7/12; D04H1/4282; D04H1/43; D04H1/4326; D04H1/4334; D04H1/435; D04H1/4374; D04H1/44; D04H1/46; D04H1/498; D04H1/54; D04H1/559; D04H1/58; D04H1/64; D04H1/68; D04H13/00; B29K; B29K2105/00; B29K2105/06; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/023; B32B2262/00; B32B2262/02; B32B2262/0261; B32B2305/00; B32B2305/08; B32B2307/00; B32B2307/70; B32B2307/718; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2904; Y10T428/2909; Y10T428/31504; Y10T428/31725; Y10T442/00; Y10T442/60; Y10T442/608; Y10T442/627; Y10T442/634; Y10T442/647; Y10T442/651
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
143 words
IN A FOAM PLASTIC ARTICLE OR FOAM CORE HAVING MARGINAL ZONES REINFORCED WITH A FIBER MAT, THE IMPROVEMENT WHICH COMPRISES USING AS THE FIBER MAT, A COMPOSITE NON-WOVEN SYNTHETIC FIBER MAT CONSISTING OF A NON-WOVEN MAT OF CRIMPED SYNTHETIC POLYAMIDE STAPLE FIBERS HAVING A TITER OF 40-100 DTEX AND A WEIGHT OF 80-200 GM/M2 AND A SECOND NON-WOVEN MAT OF FINE TITER TEXTURED SYNTHETIC STAPLE FIBERS OR TEXTURED SYNTHETIC FILAMENTS, SAID SECOND NON-WOVEN MAT HAVING A TITER OF 2-10 DTEX AND A WEIGHT OF 50-500 GM/M2 AND BEING FIRMLY BONDED TO ONE SURFACE OF THE NON-WOVEN POLYAMIDE FIBER MAT AND SAID SECOND NON-WOVEN MAT BEING POSITIONED ADJACENT TO THE OUTER SURFACE OF THE MARGINAL ZONE WHEREIN THE COARSE FIBERS COMPRISE FROM ABOUT 25 PERCENT TO ABOUT 60 PERCENT OF THE COMBINED WEIGHTS PER SQUARE METER OF THE COARSE AND THE FINE FIBER MATS.
Claim 2
Dependent Claim
143 words
IN A FOAM PLASTIC ARTICLE OR FOAM CORE HAVING MARGINAL ZONES REINFORCED WITH A FIBER MAT, THE IMPROVEMENT WHICH COMPRISES USING AS THE FIBER MAT, A COMPOSITE NON-WOVEN SYNTHETIC FIBER MAT CONSISTING OF A NON-WOVEN MAT OF CRIMPED SYNTHETIC POLYAMIDE STAPLE FIBERS HAVING A TITER OF 40-100 DTEX AND A WEIGHT OF 80-200 GM/M2 AND A SECOND NON-WOVEN MAT OF FINE TITER TEXTURED SYNTHETIC STAPLE FIBERS OR TEXTURED SYNTHETIC FILAMENTS, SAID SECOND NON-WOVEN MAT HAVING A TITER OF 2-10 DTEX AND A WEIGHT OF 50-500 GM/M2 AND BEING FIRMLY BONDED TO ONE SURFACE OF THE NON-WOVEN POLYAMIDE FIBER MAT AND SAID SECOND NON-WOVEN MAT BEING POSITIONED ADJACENT TO THE OUTER SURFACE OF THE MARGINAL ZONE WHEREIN THE COARSE FIBERS COMPRISE FROM ABOUT 25 PERCENT TO ABOUT 60 PERCENT OF THE COMBINED WEIGHTS PER SQUARE METER OF THE COARSE AND THE FINE FIBER MATS.
Claim 3
Dependent Claim
15 words
Foamed plastic articles or structures of claim 1, wherein the foam plastic is a polyurethane.
References Cited (Backward Citations)
US3523059A
Cited
US3255509A
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US3476636A
Cited
US3506529A
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US3546060A
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US3591444A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |