US4190698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-transmitting fire screening panel
Assignee: Flachglas Wernberg GmbH
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Filing: 1978-07-28
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Granted: 1980-02-26
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Expires: 1998-07-28
Abstract
Abstract A light-transmitting fire screening panel comprising at least one sheet of glass and at least one layer of intumescent material, the improvement which comprises utilizing in the layer a hydrated alkali metal silicate as intumescent material and one or more adjuvants selected from: urea, polyhydric alcohol (including glycerine, ethylene glycol and sorbitol), monosaccharide (including glucose), polysaccharide (including starch), sodium phosphate, sodium aluminate, aluminum phosphate, borax, boric acid and colloidal silica.
Inventors
- 👤 Marcel De Boel
- 👤 Pol Baudin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:43
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10165; B32B17/10311; B32B17/069; B32B17/10293; B32B7/00; B32B7/04; B32B7/12; E; E06; E06B; E06B7/00; E06B7/28; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/92; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31551; Y10T428/31627; Y10T428/3163; Y10T428/31634
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
87 words
A light-transmitting fire screening panel comprising at least one sheet of glass and at least one layer of intumescent material having a thickness between 0.1 and 8 mm, the improvement which comprises said layer containing a hydrated alkali metal silicate as intumescent material and one or more adjuvants selected from the group consisting of: urea, polyhydric alcohol, monosaccaride, polysaccharide, sodium phosphate, sodium aluminate, aluminum phosphate, borax, boric acid and colloidal silica, said adjuvant being present in a proportion of less than 20% by weight of the layer.
Claim 2
Dependent Claim
87 words
A light-transmitting fire screening panel comprising at least one sheet of glass and at least one layer of intumescent material having a thickness between 0.1 and 8 mm, the improvement which comprises said layer containing a hydrated alkali metal silicate as intumescent material and one or more adjuvants selected from the group consisting of: urea, polyhydric alcohol, monosaccaride, polysaccharide, sodium phosphate, sodium aluminate, aluminum phosphate, borax, boric acid and colloidal silica, said adjuvant being present in a proportion of less than 20% by weight of the layer.
Claim 3
Dependent Claim
26 words
A panel as defined in claim 1 wherein said polyhydric alcohol includes glycerine, ethylene glycol and sorbitol, said monosaccharide includes glucose and said polysaccharide includes starch.
Claim 4
Dependent Claim
26 words
A panel as defined in claim 1 or 2 wherein said adjuvant is present in a proportion of less than 10% by weight of the layer.
Claim 5
Dependent Claim
26 words
A panel is defined in claim 1 or 2 wherein said adjuvant is present in proportion of between 2 and 20% by weight of the layer.
Claim 6
Dependent Claim
32 words
A panel as defined in claim 2 wherein glycerine is used as said adjuvant, said glycerine being present in a proportion of from 10% to 4% inclusive by weight of the layer.
Claim 7
Dependent Claim
31 words
A panel as defined in claim 1 or 2 wherein urea is used as said adjuvant, said urea being present in a proportion of less than 5% weight of the layer.
Claim 8
Dependent Claim
17 words
A panel as defined in claim 6 wherein the proportion of urea is between 2 and 4%.
Claim 9
Dependent Claim
33 words
A panel as defined in claim 1 or 2 wherein sorbitol is used as said adjuvant, said sorbitol being present in a proportion of between 2 and 4% by weight of the layer.
Claim 10
Dependent Claim
34 words
A panel as defined in claim 1 or 2 wherein sodium phosphate is used as said adjuvant, said sodium phosphate being present in a proportion of 6% or less by weight of the layer.
Claim 11
Dependent Claim
49 words
A panel as defined in claim 1 or 2 wherein said adjuvant is used in admixture with one or more other of said adjuvants or some other additive and such admixture is present in a proportion of less than 20% preferably less than 10%, by weight of the layer.
Claim 12
Dependent Claim
19 words
A panel as defined in claim 2 wherein glycerine is used as said adjuvant in admixture with a saccharide.
Claim 13
Dependent Claim
25 words
A panel as defined in claim 11 wherein said saccharide is present in a proportion of between 1 and 4% by weight of the layer.
Claim 14
Dependent Claim
84 words
A light-transmitting fire screening panel comprising at least one sheet of glass and at least one layer of intumescent material having a thickness between 0.1 and 8 mm, the improvement which comprises said layer containing a hydrated alkali metal silicate as intumescent material in combination with one or more adjuvants selected to allow accelerated drying of the layer selected from the group consisting of glycerine and ethylene glycol, said adjuvant being present in a proportion of less than 20% by weight of the layer.
Claim 15
Dependent Claim
84 words
A light-transmitting fire screening panel comprising at least one sheet of glass and at least one layer of intumescent material having a thickness between 0.1 and 8 mm, the improvement which comprises said layer containing a hydrated alkali metal silicate as intumescent material in combination with one or more adjuvants selected to allow accelerated drying of the layer selected from the group consisting of glycerine and ethylene glycol, said adjuvant being present in a proportion of less than 20% by weight of the layer.
Claim 16
Dependent Claim
17 words
A panel as defined in claim 13 wherein said adjuvant is used in admixture with a saccharide.
Claim 17
Dependent Claim
18 words
A panel as defined in claim 13 or 14 wherein said adjuvant is used in a non-coloring proportion.
Claim 18
Dependent Claim
22 words
A panel as defined in claim 13 or 14 wherein each outer face of the panel is formed by a glass sheet.
Claim 19
Dependent Claim
22 words
A panel as defined in claim 13 or 14 wherein various plies of the panel are bonded together to form a laminate.
Claim 20
Dependent Claim
22 words
A panel as defined in claim 13 or 14 wherein the alkali metal silicate used as intumescent material is hydrated sodium silicate.
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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) | 1983-02-25 | 1983-08-27 | 1984-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-25 | 1987-08-27 | 1988-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-25 | 1991-08-27 | 1992-02-26 | $7700.00 | Window Closed / Lapsed |