US4223066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire retardant treatment of fire unstable materials and products obtained
Assignee: Lyondell Chemical Technology LP
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Filing: 1979-05-23
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Granted: 1980-09-16
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Expires: 1999-05-23
Abstract
Abstract Pressure treatment of fire unstable materials by an intumescent fire retardant composition which is injected or insinuated into the surface of fire unstable materials results in a fire and flameproof structure with a high capacity to withstand prolonged exposure to flame and heat.
Inventors
- 👤 Robert J. Boyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:17
CPC Classifications
C; C09; C09K; C09K21/00; C09K21/14; C08; C08J; C08J9/00; C08J9/36; C08J9/365; B; B27; B27K; B27K2240/00; B27K2240/30; B27K5/00; B27K5/007; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249954; Y10T428/249961; Y10T428/31504; Y10T428/31971; Y10T428/31989; Y10T428/4935; Y10T428/662
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
56 words
A fire and heat resistant structure comprising a strata of fire unstable material having an intumescent fire retardant composition in powdered form injected into at least one major surface of such strata for an appreciable depth at a pressure sufficiently low to preclude any appreciable impairment of said material and below 500 pounds per square inch.
Claim 2
Dependent Claim
56 words
A fire and heat resistant structure comprising a strata of fire unstable material having an intumescent fire retardant composition in powdered form injected into at least one major surface of such strata for an appreciable depth at a pressure sufficiently low to preclude any appreciable impairment of said material and below 500 pounds per square inch.
Claim 3
Dependent Claim
17 words
A structure as claimed in claim 1 in which the fire unstable material comprises a polymeric material.
Claim 4
Dependent Claim
16 words
A structure as claimed in claim 1 in which the fire unstable material comprises foam polystyrene.
Claim 5
Dependent Claim
16 words
A structure as claimed in claim 1 in which the fire unstable material comprises foam polyurethane.
Claim 6
Dependent Claim
15 words
A structure as claimed in claim 1 in which the fire unstable material is wood.
Claim 7
Dependent Claim
15 words
A structure as claimed in claim 1 in which the fire unstable material is plywood.
Claim 8
Independent Claim
66 words
The method of rendering a fire unstable material capable of withstanding prolonged exposure to heat and flame which comprises injecting an intumescent fire retardant composition in powder form suspended in a stream of pressurized fluid into a surface of said fire unstable material for an appreciable depth, said fluid pressure being sufficiently low to preclude impairment of said material and below 500 pounds per square inch.
Claim 9
Independent Claim
66 words
The method of rendering a fire unstable material capable of withstanding prolonged exposure to heat and flame which comprises injecting an intumescent fire retardant composition in powder form suspended in a stream of pressurized fluid into a surface of said fire unstable material for an appreciable depth, said fluid pressure being sufficiently low to preclude impairment of said material and below 500 pounds per square inch.
Claim 10
Dependent Claim
37 words
A method as claimed in claim 7 in which the said injection is accomplished by disposing the fire retardant composition in a pressurized air stream, and directing said stream toward said surface of said fire unstable material.
Claim 11
Dependent Claim
24 words
The method as claimed in claim 7 in which said fire retardant composition comprises a reaction product of phosphoric acid and a reducing sugar.
Claim 12
Dependent Claim
89 words
An article of manufacture having superior fire and flame resistance over a prolonged exposure time which comprises a piece of foamed polymeric material having at least its major surfaces treated by a stream of pressurized air at a pressure of up to about 120 psi having suspended therein an intumescent fire retardant composition in powdered form, said composition being present on the treated surface and for an appreciable depth thereinto, and said composition being present in an amount of up to about 50 grams per square foot of surface.
Claim 13
Dependent Claim
89 words
An article of manufacture having superior fire and flame resistance over a prolonged exposure time which comprises a piece of foamed polymeric material having at least its major surfaces treated by a stream of pressurized air at a pressure of up to about 120 psi having suspended therein an intumescent fire retardant composition in powdered form, said composition being present on the treated surface and for an appreciable depth thereinto, and said composition being present in an amount of up to about 50 grams per square foot of surface.
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) | 1983-09-16 | 1984-03-17 | 1984-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-16 | 1988-03-17 | 1988-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-16 | 1992-03-17 | 1992-09-16 | $7700.00 | Window Closed / Lapsed |