US3894973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of pneumacel in rebonded structures comprising polyurethane scrap
Assignee: EIDP Inc
•
Filing: 1974-03-19
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Granted: 1975-07-15
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Expires: 1994-03-19
Abstract
Abstract A cushioning structure comprising shredded polyurethane foam or other similar foam and shredded pneumacel batting, bonded together by means of a polyurethane binder to form an improved rebonded structure.
Inventors
- 👤 Malak E Yunan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:30
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/33; C08J2205/00; C08J2205/06; C08J2321/00; C08J2375/00; C08J2375/04; C08J2400/00; C08J2400/26; C08J2411/00; C08J2411/02; C08J2475/00; C08J2475/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
50 words
A CUSHIONING STRUCTURE OF LOW DENSITY OFHIGH RESISTANCE TO BOTTOMING OUT UNDER COMPRESSION WHICH COMPRISES A REBOND MIXTURE OF SHREDDED PNEUMACEL BATTING AND SHREDDED FORM PARTICLES OF ESILIENT ORGANIC POLYMER OF THE CLASS CONSISTING OF POLYURETHANE, NATURAL RUBBER AND SYNTHETIC RUBBER, SAID MIXTURE BEING BONDED TOGETHER BY AN ELASTOMERIC BINDER.
Claim 2
Dependent Claim
50 words
A CUSHIONING STRUCTURE OF LOW DENSITY OFHIGH RESISTANCE TO BOTTOMING OUT UNDER COMPRESSION WHICH COMPRISES A REBOND MIXTURE OF SHREDDED PNEUMACEL BATTING AND SHREDDED FORM PARTICLES OF ESILIENT ORGANIC POLYMER OF THE CLASS CONSISTING OF POLYURETHANE, NATURAL RUBBER AND SYNTHETIC RUBBER, SAID MIXTURE BEING BONDED TOGETHER BY AN ELASTOMERIC BINDER.
Claim 3
Dependent Claim
19 words
The cushioning structure of claim 1 wherein the shredded foam particles constitute the major component in parts by weight.
Claim 4
Dependent Claim
33 words
The composition of claim 1 wherein said cushioning structure comprises 1-50 parts by weight of shredded pneumacel batting, 99-50 parts by weight of shredded foam particles, and 5-50 parts by weight of binder.
Claim 5
Dependent Claim
57 words
A cushioning structure of low density and high resistance to bottoming out under load composed of a rebond resilient mixture of a major amount in parts by weight of particles of shredded polyurethane foam and a minor amount in parts by weight of poly(ethylene terephthalate)pneumacel fibers, the mixture being bonded together by means of a polyurethane binder.
Claim 6
Dependent Claim
57 words
A cushioning structure of low density and high resistance to bottoming out under load composed of a rebond resilient mixture of a major amount in parts by weight of particles of shredded polyurethane foam and a minor amount in parts by weight of poly(ethylene terephthalate)pneumacel fibers, the mixture being bonded together by means of a polyurethane binder.
References Cited (Backward Citations)
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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) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |