Patent US4269889A successfully refreshed from Google Patents.
US4269889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane cushion material and preparing the same
Assignee: Individual
•
Filing: 1978-04-05
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Granted: 1981-05-26
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Expires: 1998-04-05
Abstract
Abstract A polyurethane cushion material comprising incorporating a large denier of a fiber filament in a foamed polyurethane, and it is produced by crimping the fiber filament, setting it under heating, producing a staple fiber, filling the staple fiber thus formed with a polyurethane into a mold, forming the polyurethane and post-curing it to complete polycondensation.
Inventors
- 👤 Sadaaki Takagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:10
CPC Classifications
B; B68; B68G; B68G1/00; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B29K; B29K2105/00; B29K2105/06; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/24995; Y10T428/249953; Y10T428/249981; Y10T428/249986; Y10T428/29; Y10T428/2904; Y10T428/2909; Y10T428/2913; Y10T428/2922; Y10T428/2925; Y10T428/298
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
83 words
A polyurethane cushion material comprising a foamed polyurethane having incorporated therein a mass of crimped polyester fiber filament of 50 to 1000 denier, in which said fiber filament has been twisted and then further twisted into a double crimped state, wet heat-set while in the double crimped state, and then opened up to form a three-oriented, crimped polyester fiber filament of 50 to 1000 denier and wherein said mass amounts to from 10 to 50 percent by weight in the polyurethane cushion material.
Claim 2
Dependent Claim
83 words
A polyurethane cushion material comprising a foamed polyurethane having incorporated therein a mass of crimped polyester fiber filament of 50 to 1000 denier, in which said fiber filament has been twisted and then further twisted into a double crimped state, wet heat-set while in the double crimped state, and then opened up to form a three-oriented, crimped polyester fiber filament of 50 to 1000 denier and wherein said mass amounts to from 10 to 50 percent by weight in the polyurethane cushion material.
Claim 3
Dependent Claim
17 words
A cushion material according to claim 1, wherein the mass of fiber filament is a locked mass.
Claim 4
Dependent Claim
17 words
A cushion material according to claim 1, wherein the mass of fiber filament is a non-locked mass.
Claim 5
Dependent Claim
22 words
A cushion material according to claim 1, wherein the fiber filament is contained uniformly in a whole of the polyurethane cushion material.
Claim 6
Dependent Claim
28 words
A cushion material which comprises a layer of polyurethane cushion material according to claim 1, wherein said layer is bonded to a separate layer of fiber-free foamed polyurethane.
Claim 7
Dependent Claim
23 words
A cushion material according to claim 5, wherein said just named layer is bonded to a second separate layer of fiber-free foamed polyurethane.
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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) | 1984-05-25 | 1984-11-24 | 1985-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-25 | 1988-11-24 | 1989-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-25 | 1992-11-24 | 1993-05-26 | $7700.00 | Window Closed / Lapsed |