US4182799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-retardant additive for foamed polystyrene
Assignee: Individual
•
Filing: 1978-06-09
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Granted: 1980-01-08
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Expires: 1998-06-09
Abstract
Abstract A flame-retarding additive for foamed polystyrene is composed of 40 to 56 weight percent of halogenated hydrocarbon, 9 to 15 weight percent of antimony oxide, 14 to 22 weight percent of zinc borate, and 16 to 28 weight percent of hydrated alumina.
Inventors
- 👤 John Rodish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:07
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0066; C08J9/0014; C08J9/0019; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/38; C08K5/00; C08K5/02; C08J2325/00; C08J2325/02; C08J2325/04; C08J2325/06; Y; Y10; Y10S; Y10S264/00; Y10S264/05; Y10S521/00; Y10S521/907
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
40 words
A flame-retarding additive for foamed polystyrene comprising 40 to 56 weight percent of halogenated hydrocarbon, 9 to 15 weight percent of antimony oxide, 14 to 22 weight percent of zinc borate, and 16 to 23 weight percent of alumina hydrate.
Claim 2
Dependent Claim
40 words
A flame-retarding additive for foamed polystyrene comprising 40 to 56 weight percent of halogenated hydrocarbon, 9 to 15 weight percent of antimony oxide, 14 to 22 weight percent of zinc borate, and 16 to 23 weight percent of alumina hydrate.
Claim 3
Dependent Claim
21 words
A flame-retarding additive as claimed in claim 1 in which the alumina hydrate is Al 2 O 3 .3H 2 O.
Claim 4
Dependent Claim
21 words
A flame-retarding additive as claimed in claim 1 in which the alumina hydrate is Al 2 O 3 .H 2 O.
Claim 5
Dependent Claim
39 words
A flame-retarding additive as claimed in claim 1 in which the composition is about 48 weight percent of halogenated hydrocarbon, 12 weight percent of antimony oxide, 18 weight percent of zinc borate, and 22 weight percent of alumina hydrate.
Claim 6
Dependent Claim
21 words
A flame-retarding additive as claimed in claim 4 in which the alumina hydrate is Al 2 O 3 .3H 2 O.
Claim 7
Dependent Claim
21 words
A flame-retarding additive as claimed in claim 4 in which the alumina hydrate is Al 2 O 3 .H 2 O.
Claim 8
Dependent Claim
56 words
A light-weight flame-retarding organic polymer shape comprising a foamed polystyrene extrusion having uniformly dispersed therein an additive composed of 40 to 56 percent by weight of halogenated hydrocarbon, 9 to 15 percent by weight of antimony oxide, 14 to 22 percent by weight of zinc borate, and 16 to 28 percent by weight of alumina hydrate.
Claim 9
Dependent Claim
56 words
A light-weight flame-retarding organic polymer shape comprising a foamed polystyrene extrusion having uniformly dispersed therein an additive composed of 40 to 56 percent by weight of halogenated hydrocarbon, 9 to 15 percent by weight of antimony oxide, 14 to 22 percent by weight of zinc borate, and 16 to 28 percent by weight of alumina hydrate.
Claim 10
Dependent Claim
21 words
A polymer shape as claimed in claim 7 in which the alumina hydrate is Al 2 O 3 .3H 2 O.
Claim 11
Dependent Claim
21 words
A polymer shape as claimed in claim 7 in which the alumina hydrate is Al 2 O 3 .H 2 O.
Claim 12
Dependent Claim
23 words
A polymer shape as claimed in claim 7 in which the extrusion consists of 10 to 20 percent by weight of additive material.
Claim 13
Dependent Claim
22 words
A polymer shape as claimed in claim 10 in which the extrusion consists of about 14 percent by weight of additive material.
Claim 14
Dependent Claim
23 words
A polymer shape as claimed in claim 7 in which the extrusion has a density of less than four pounds per cubic foot.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-01-07 | 1983-07-09 | 1984-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-07 | 1987-07-09 | 1988-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-07 | 1991-07-09 | 1992-01-08 | $7700.00 | Window Closed / Lapsed |