Patent US4879066A successfully refreshed from Google Patents.
US4879066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire retardant additives and their uses
Assignee: CEEPREE PRODUCTS Ltd
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Filing: 1988-04-11
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Granted: 1989-11-07
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Expires: 2008-04-11
Abstract
Abstract A composition comprising two or more frits of different melting temperatures and optionally one or more ceramic material or basalt or intumescent substance is provided that may be added to a variety of materials to provides or enhance fire resistance. Such materials include phenolic and polyester resins and sodium silicate.
Inventors
- 👤 Geoffrey Crompton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:41
CPC Classifications
C; C09; C09K; C09K21/00; C09K21/02; C08; C08K; C08K3/00; C08K3/01; C08K3/016; C09K21/14
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
60 words
A composition for providing or enhancing the fire resistance of a material comprising: a first frit having a relatively low melting point; and at least one other devitrifying frit having a relatively high melting point compared to the melting point of said first frit, said frits melting progressively under fire conditions to provide a fused protective layer for said material.
Claim 2
Dependent Claim
60 words
A composition for providing or enhancing the fire resistance of a material comprising: a first frit having a relatively low melting point; and at least one other devitrifying frit having a relatively high melting point compared to the melting point of said first frit, said frits melting progressively under fire conditions to provide a fused protective layer for said material.
Claim 3
Dependent Claim
13 words
A composition as claimed in claim 1 further comprising ceramic fibres or powder.
Claim 4
Dependent Claim
13 words
A composition as claimed in claim 1 further comprising basalt fibres or powder.
Claim 5
Dependent Claim
12 words
A composition as claimed in claim 1, further comprising an intumescent substance.
Claim 6
Dependent Claim
22 words
A composition as claimed in claim 4 wherein the intumescent substance is alumina trihydrate, hydrated magnesium calcium carbonate or a mixture thereof.
Claim 7
Dependent Claim
26 words
A composition as claimed in claim 1 wherein said first frit and said high melt devitrifying frit are in a weight ratio of 1:9 to 1:1.
Claim 8
Dependent Claim
22 words
A composition as claimed in claim 6, wherein the weight ratio of low melt frit to high melt frit is about 3:7.
Claim 9
Dependent Claim
38 words
A composition as claimed in claim 1 including an intumescent substance wherein the amount of frits is in the range of 15 to 50% by weight and the amount of intumescent substance is 85 to 50% by weight.
Claim 10
Dependent Claim
11 words
A composition as claimed in claim 6 further comprising sodium silicate.
Claim 11
Dependent Claim
27 words
A composition as claimed in claim 9, wherein the ratio of total frits and intumescent substance to sodium silicate is in the range of 3:7 to 1:1.
Claim 12
Dependent Claim
11 words
A composition as claimed in claim 6 further comprising phenolic resin.
Claim 13
Dependent Claim
11 words
A composition as claimed in claim 6 further comprising polyester resin.
Claim 14
Dependent Claim
21 words
A composition as claimed in claim 1 further comprising a char agent, ammonium polyphosphate, sodium silicate and an inorganic gelling agent.
Claim 15
Dependent Claim
20 words
A composition as claimed in claim 1 further comprising a char agent, ammonium polyphosphate, polyvinylacetate and an inorganic gelling agent.
Claim 16
Dependent Claim
33 words
A composition as claimed in claim 1 wherein said first frit has a melting point between 300°-500° C. and said at least one other devitrifying frit has a melting point between 600°-800° C.
Claim 17
Independent Claim
68 words
A method of providing or enhancing the fire resistance of a material or composition comprising adding thereto a composition including a first frit having a relatively low melting point and a second devitrifying frit having a relatively high melting point compared with said first frit so that under fire conditions the frits melt progressively to provide a fused protective layer for said material or composition to be protected.
Claim 18
Independent Claim
68 words
A method of providing or enhancing the fire resistance of a material or composition comprising adding thereto a composition including a first frit having a relatively low melting point and a second devitrifying frit having a relatively high melting point compared with said first frit so that under fire conditions the frits melt progressively to provide a fused protective layer for said material or composition to be protected.
Claim 19
Dependent Claim
75 words
A composition for providing or enhancing the fire resistance of a material comprising: a first frit having a relatively low melting point; a second frit having a melting point higher than said first frit; and at least one other frit having a melting point higher than said second frit, at least one of said frits being a devitrifying frit, said frits melting progressively under fire conditions to provide a fused protective layer for said material.
Claim 20
Dependent Claim
75 words
A composition for providing or enhancing the fire resistance of a material comprising: a first frit having a relatively low melting point; a second frit having a melting point higher than said first frit; and at least one other frit having a melting point higher than said second frit, at least one of said frits being a devitrifying frit, said frits melting progressively under fire conditions to provide a fused protective layer for said material.
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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) | 1992-11-06 | 1993-05-08 | 1993-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-06 | 1997-05-08 | 1997-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-06 | 2001-05-08 | 2001-11-07 | $7700.00 | Window Closed / Lapsed |