Patent US4277569A successfully refreshed from Google Patents.
US4277569A
Expired / Lapsed
US
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Fire-retardant foam
Assignee: MARINE MIDLAND BUSINESS LOANS Inc
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Filing: 1980-03-10
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Granted: 1981-07-07
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Expires: 2000-03-10
Abstract
Abstract A low-density fire-retardant foam for use in furniture padding, thermal insulation and the like comprising a foamable blend of a polymer, an antimony oxide and a halogenated compound.
Inventors
- 👤 Benjamin M. Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:23
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0019; C08J2323/00; C08J2323/02; Y; Y10; Y10S; Y10S260/00; Y10S260/24; Y10S521/00; Y10S521/907
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
39 words
A low density fire-retardant foam comprising a foamed blend of a polyolefin polymer, an antimony oxide and a halogenated wax wherein the ratio of said halogenated wax to said antimony oxide is from about 7:1 to 9:1 by weight.
Claim 2
Dependent Claim
39 words
A low density fire-retardant foam comprising a foamed blend of a polyolefin polymer, an antimony oxide and a halogenated wax wherein the ratio of said halogenated wax to said antimony oxide is from about 7:1 to 9:1 by weight.
Claim 3
Dependent Claim
20 words
Fire retardant foam according to claim 1 wherein said polyolefin polymer comprises at least 90% by weight of said blend.
Claim 4
Dependent Claim
21 words
Fire retardant foam according to claim 2 wherein said blend further includes a nucleating agent and a normally gaseous expanding agent.
Claim 5
Dependent Claim
23 words
A fire retardant foam according to claim 2 wherein said polyolefin polymer is polyethylene and said halogenated wax is a chlorinated paraffin wax.
Claim 6
Dependent Claim
22 words
Fire retardant foam according to claim 2 wherein said ratio of said halogenated wax to said antimony oxide is 8:1 by weight.
Claim 7
Dependent Claim
48 words
Fire retardant foam according to claim 4 wherein said polyethylene is present in an amount of about 92.8% by weight, and chlorinated paraffin wax is present in an amount of about 6.4% by weight and said antimony oxide is present in an amount of about 0.8% by weight.
Claim 8
Dependent Claim
17 words
Fire retardant foam according to claim 3 wherein said normally gaseous expanding agent is a polyhalogenated hydrocarbon.
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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) | 1984-07-06 | 1985-01-05 | 1985-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-06 | 1989-01-05 | 1989-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-06 | 1993-01-05 | 1993-07-07 | $7700.00 | Window Closed / Lapsed |