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US3983040A
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Fire-retardant composition and process of producing same
Assignee: Individual
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Filing: 1975-08-07
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Granted: 1976-09-28
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Expires: 1995-08-07
Abstract
Abstract A fire-retardant composition of matter is produced as the dried and pulverized reaction product of treating a calcium, sodium, magnesium, or potassium borate ore with sulfuric acid. The composition is especially useful for application as a dry powder to cellulosic materials, but may be made into a liquid suspension for spray application or into a paste for some fire retardant applications.
Inventors
- 👤 Samuel M. Draganov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:30
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/34; C; C09; C09K; C09K21/00; C09K21/02; D21H17/00; D21H17/71; D21H17/73; D21H5/00; D21H5/0002
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
77 words
A fire-retardant compositon of matter, comprising a particulate reaction product of a borate ore and sulfuric acid, said one having been selected from the group consisting of calcium, sodium, magnesium, and potassium borates, and mixtures thereof and said composition containing boric acid as a constituent of said reaction product, and a significant quantity of one or more sulfates selected from the group consisting of calcium, sodium, magnesium, and potassium sulfates, as a constituent of said reaction product.
Claim 2
Dependent Claim
77 words
A fire-retardant compositon of matter, comprising a particulate reaction product of a borate ore and sulfuric acid, said one having been selected from the group consisting of calcium, sodium, magnesium, and potassium borates, and mixtures thereof and said composition containing boric acid as a constituent of said reaction product, and a significant quantity of one or more sulfates selected from the group consisting of calcium, sodium, magnesium, and potassium sulfates, as a constituent of said reaction product.
Claim 3
Dependent Claim
33 words
A composition of matter in accordance with claim 1, wherein the dry and pulverous reaction product contains from approximately 25% to approximately 60% boric acid and from approximately 25% to approximately 75% sulfate.
Claim 4
Dependent Claim
17 words
A composition of matter in accordance with claim 2, wherein the sulfate is substantially all calcium sulfate.
Claim 5
Dependent Claim
17 words
A composition of matter in accordance with claim 1, wherein the reaction product is dry and pulverous.
Claim 6
Dependent Claim
32 words
A composition of matter in accordance with claim 1, wherein particles of the reaction product are suspended in a liquid medium for spraying application to a material to be made fire retardant.
Claim 7
Dependent Claim
35 words
A composition of matter in accordance with claim 1, wherein particles of the reaction product are admixed with a liquid vehicle to form a paste for application to a material to be made fire retardant.
Claim 8
Dependent Claim
63 words
A process for producing a fire-retardant composition of matter, comprising reacting a pulverized borate ore selected from the group consisting of calcium, sodium, magnesium, and potassium borates mixtures thereof, with sulfuric acid for a time sufficient to produce a reaction product containing a boric acid constituent and a sulfate constituent; drying the reaction product containing said constituents; and pulverizing the dried reaction product.
Claim 9
Dependent Claim
63 words
A process for producing a fire-retardant composition of matter, comprising reacting a pulverized borate ore selected from the group consisting of calcium, sodium, magnesium, and potassium borates mixtures thereof, with sulfuric acid for a time sufficient to produce a reaction product containing a boric acid constituent and a sulfate constituent; drying the reaction product containing said constituents; and pulverizing the dried reaction product.
Claim 10
Dependent Claim
24 words
A process according to claim 7, wherein the borate ore contains from about 25% to about 60% by weight B 2 O 3 .
Claim 11
Dependent Claim
57 words
A process according to claim 7, wherein the reaction is carried out by gradually introducing and blending the sulfuric acid to and with the pulverized ore while agitating the latter; by thereafter adding water to the resulting mixture and mixing the water therewith until a substantially dry reaction product is obtained; and pulverizing the dried reaction product.
Claim 12
Dependent Claim
50 words
A process according to claim 7, wherein the introduction and blending of the ore and the sulfuric acid extends throughout a period of about one-half hour; wherein water is added over a period of about twenty minutes; and wherein mixing is continued for an additional period of about twenty minutes.
References Cited (Backward Citations)
US3860692A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |