US4241190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite foamed material
Assignee: PENDING NO 1 Inc
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Filing: 1979-04-05
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Granted: 1980-12-23
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Expires: 1999-04-05
Abstract
Abstract A process is disclosed herein for the production of a composite foamed material which comprises premixing expandable polystyrene beads and a binder and adding the premix to fragments of resilient, open-celled material. The materials are combined in the proportions of about 4-15% polystyrene beads, about 6-25% binder and about 60-90% open-celled material. The combined materials are compressed to a density of about 5-30 lbs per cubic foot preferably 5-17 lbs per cubic foot, and steam is applied to the compressed materials to cure the binder and expand the polystyrene beads, producing the desired composite foamed material.
Inventors
- 👤 Seymour Lichter
- 👤 Frank P. Nold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:22
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/35; C08J9/22; C08J9/228; C08J9/232; C08J9/236; C08J2375/00; C08J2375/04; C08J2425/00; C08J2425/02; C08J2425/04; C08J2425/06; Y; Y10; Y10S; Y10S264/00; Y10S264/07; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
109 words
A composite foamed material comprising: a. fragments of resilient, open-celled material; b. expanded polystyrene beads dispersed among said fragments of open-celled material, said beads being expanded in situ while said open-celled material and said beads dispersed therein are held under compression; and c. a binder securing together said fragments of open-celled material and said beads, said open-celled material, beads and binder being present in amounts of about 60% to about 90% of the open-celled material, about 4% to about 15% of the beads, and about 6% to about 25% of the binder, said composite foamed material having a density of from about 5 to about 30 lbs/ft 3 .
Claim 2
Dependent Claim
109 words
A composite foamed material comprising: a. fragments of resilient, open-celled material; b. expanded polystyrene beads dispersed among said fragments of open-celled material, said beads being expanded in situ while said open-celled material and said beads dispersed therein are held under compression; and c. a binder securing together said fragments of open-celled material and said beads, said open-celled material, beads and binder being present in amounts of about 60% to about 90% of the open-celled material, about 4% to about 15% of the beads, and about 6% to about 25% of the binder, said composite foamed material having a density of from about 5 to about 30 lbs/ft 3 .
Claim 3
Dependent Claim
46 words
The material of claim 1 in which said beads were expanded in situ and said binder was cured to provide securement together of said fragments of open-celled material and said beads by the passage of steam through a mixture of said open-celled material, beads and binder.
Claim 4
Dependent Claim
19 words
The material of claim 1 and having a density of from about 5 to about 17 lbs/ft 3 .
Claim 5
Dependent Claim
19 words
The material of claim 3 and having a density of from about 7 to about 9 lbs/ft 3 .
Claim 6
Dependent Claim
26 words
The material of claim 1 and comprising about 80% of the resilient, open-celled material, about 7.5% of the polystyrene beads and about 12.5% of the binder.
Claim 7
Dependent Claim
14 words
The material of claim 1 in which the resilient, open-celled material is polyurethane foam.
Claim 8
Dependent Claim
14 words
The material of claim 6 in which the binder is a polyurethane prepolymer binder.
Claim 9
Dependent Claim
23 words
The material of claim 1 in which the amount of the binder is about 10% of the amount of the resilient, open-celled material.
Claim 10
Dependent Claim
21 words
The material of claim 1 in which the polystyrene beads have a maximum diameter of about 0.1 mm prior to expansion.
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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) | 1983-12-23 | 1984-06-23 | 1984-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-23 | 1988-06-23 | 1988-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-23 | 1992-06-23 | 1992-12-23 | $7700.00 | Window Closed / Lapsed |