US4495238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire resistant thermal insulating structure and garments produced therefrom
Assignee: Pall Corp
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Filing: 1983-10-14
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Granted: 1985-01-22
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Expires: 2003-10-14
Abstract
Abstract Fire resistant thermal insulating composite structures, particularly garments, comprised of a mixture of from about 50 to about 94 percent by weight of inorganic microfibers, particularly glass, and about 50 to about 6 percent by weight of a heat resistant binding agent. The structures are porous, allowing them to breath. The structures are also flexible and pliant and have a Thermal Resistance of at least about 25 seconds.
Inventors
- 👤 Joseph G. Adiletta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:28
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; A; A62; A62B; A62B17/00; A41; A41D; A41D31/00; A41D31/04; A41D31/08; A41D31/085; B32B5/16; E; E04; E04B; E04B1/00; E04B1/62; E04B1/92; E04B1/94; B32B2262/00; B32B2262/02; B32B2262/0261; B32B2262/0269; B32B2262/10; B32B2262/101; B32B2262/14; B32B2305/00; B32B2305/02; B32B2305/026; B32B2307/00; B32B2307/30; B32B2307/304; B32B2307/306; B32B2307/3065; B32B2307/70; B32B2307/718; B32B2309/00; B32B2309/08; B32B2309/10; B32B2309/105; Y; Y10; Y10S; Y10S428/00; Y10S428/903; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T442/00; Y10T442/30; Y10T442/3065; Y10T442/313; Y10T442/3138; Y10T442/3707; Y10T442/378; Y10T442/3829
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
77 words
A porous, flexible and pliant fire and heat resistant composite structure comprising: at least one outer layer of a fire resistant fabric and one or more layers of a heat resistant material comprised of a mixture of from 50 to about 94 percent by weight of inorganic microfibers and from about 50 to about 6 percent by weight of a heat resistant binding agent, said composite structure having a Thermal Resistance of at least about 25 seconds.
Claim 2
Dependent Claim
77 words
A porous, flexible and pliant fire and heat resistant composite structure comprising: at least one outer layer of a fire resistant fabric and one or more layers of a heat resistant material comprised of a mixture of from 50 to about 94 percent by weight of inorganic microfibers and from about 50 to about 6 percent by weight of a heat resistant binding agent, said composite structure having a Thermal Resistance of at least about 25 seconds.
Claim 3
Dependent Claim
20 words
The composite structure of claim 1 wherein said inorganic microfibers are comprised of a mixture of glass and potassium titanate.
Claim 4
Dependent Claim
14 words
The composite structure of claim 1 wherein said inorganic microfibers are comprised of glass.
Claim 5
Dependent Claim
40 words
The composite structure of claim 3 wherein said glass fibers comprise from about 70 to about 92 percent by weight of said mixture and said binding agent comprises from about 30 to about 8 percent by weight of said mixture.
Claim 6
Dependent Claim
47 words
The composite structure of claim 3 wherein said glass microfibers have diameters in the range of 0.4 to about 4.0 micrometers, average lengths in the range of from about 50 to about 3,000 micrometers and aspect ratios in the range of from about 20:1 to about 1,000:1.
Claim 7
Dependent Claim
23 words
The composite structure of claim 5 wherein said glass microfibers have diameters in the range of from about 0.5 to about 2.0 micrometers.
Claim 8
Dependent Claim
23 words
The composite structure of claim 3 wherein said binding agent comprises a heteropolymer formed at least in part from a vinyl chloride monomer.
Claim 9
Dependent Claim
16 words
The composite structure of claim 7 wherein said heteropolymer is an ethylene vinyl chloride acrylamide terpolymer.
Claim 10
Dependent Claim
40 words
The composite material of claim 3 wherein said fire resistant fabric comprises an aromatic polyamide fabric produced from yarns formed by combining one of the meta- or para-isomers of phenylenediamine with one of the meta- or para-isomers of phthaloyl chloride.
Claim 11
Dependent Claim
31 words
The composite material of claim 3 wherein said fire resistant fabric is a heavy cotton fabric having a basis weight of from about 2 to about 10 ounces per square yard.
Claim 12
Dependent Claim
36 words
The composite structure of claim 3 wherein said heat resistant material is present in the form of two or more layers, each having a thickness in the range of from about 8 to about 30 mils.
Claim 13
Dependent Claim
21 words
The composite structure of claim 11 wherein said heat resistant material is present in the form of four or more layers.
Claim 14
Dependent Claim
21 words
The composite structure of claim 12 wherein said outer layer has a thickness of from about 10 to about 20 mils.
Claim 15
Dependent Claim
18 words
A heat and fire resistant garment comprised of the fire and heat resistant composite structure of claim 3.
Claim 16
Dependent Claim
24 words
The composite structure of claim 1 wherein said heat resistant material has been treated to render it hydrophobic, oleophobic, solvent resistant and detergent resistant.
Claim 17
Dependent Claim
18 words
A heat and fire resistant garment comprised of the fire and heat resistant composite structure of claim 1.
Claim 18
Dependent Claim
125 words
A porous, flexible and pliant fire and heat resistant composite structure comprising: at least one outer layer of a fire resistant fabric and one or more layers of a heat resistant material comprised of a mixture of from about 50 to about 94 percent by weight of glass microfibers and from about 50 to about 6 percent by weight of a heat resistant binding agent, said composite structure having a Thermal Resistance of at least about 25 seconds, a porosity of from about 0.01 to about 20 cubic feet of air per square foot of surface area per minute at a pressure of 0.5 inches WC and a temperature of 50 degrees C., and an overall thickness of from about 30 to about 100 mils.
Claim 19
Dependent Claim
125 words
A porous, flexible and pliant fire and heat resistant composite structure comprising: at least one outer layer of a fire resistant fabric and one or more layers of a heat resistant material comprised of a mixture of from about 50 to about 94 percent by weight of glass microfibers and from about 50 to about 6 percent by weight of a heat resistant binding agent, said composite structure having a Thermal Resistance of at least about 25 seconds, a porosity of from about 0.01 to about 20 cubic feet of air per square foot of surface area per minute at a pressure of 0.5 inches WC and a temperature of 50 degrees C., and an overall thickness of from about 30 to about 100 mils.
Claim 20
Dependent Claim
134 words
The composite structure of claim 17 wherein said microfibers are present in said mixture in an amount of from about 70 to about 92 percent by weight of said mixture, said heat resistant binding agent comprises a heteropolymer formed at least in part from a vinyl chloride monomer and is present in said mixture in an amount of from about 30 to about 8 percent by weight of said mixture, said heat resistant material is comprised of two or more layers, each having a thickness in the range of from about 8 to about 30 mils, said fire resistant fabric comprises a heavy cotton fabric having a basis weight of from about 2 to about 10 ounces per square yard and said composite structure has a Thermal Resistance of at least about 30 seconds.
Claim 21
Dependent Claim
18 words
A heat and fire resistant garment comprised of the fire and heat resistant composite structure of claim 18.
Claim 22
Dependent Claim
18 words
A heat and fire resistant garment comprised of the fire and heat resistant composite structure of claim 17.
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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) | 1988-01-22 | 1988-07-23 | 1989-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-22 | 1992-07-23 | 1993-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-22 | 1996-07-23 | 1997-01-22 | $7700.00 | Window Closed / Lapsed |