US4102338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hardenable sheet materials
Assignee: National Research Development Corp UK
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Filing: 1976-10-20
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Granted: 1978-07-25
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Expires: 1996-10-20
Abstract
Abstract A water-hardenable sheet material comprising a flexible web having deposited thereon an intimate mixture of a water soluble poly(carboxylic acid) or a precursor thereof and an ion leachable inorganic particulate material.
Inventors
- 👤 Robert Sydney Richard Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:07
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/28; A; A61; A61F; A61F13/00; A61F13/04; A61L; A61L15/00; A61L15/07; A61L15/12; A61B; A61B17/00; A61B2017/00831; A61B2017/00902; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249994; Y10T428/249999; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/172; Y10T442/174; Y10T442/20; Y10T442/2762; Y10T442/277
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
98 words
A water-hardenable sheet useful as a splinting material for portions of the human and animal anatomy which comprises a flexible web having adhered thereto a cement-forming material, said cement-forming material comprising a water-soluble poly(carboxylic acid) or a precursor thereof that forms a poly(carboxylic acid) on contact with water and an ion-leachable inorganic particulate material, which together form a cement upon contact with water, said cement-forming material being present in an amount sufficient to form a splinting material for portions of the human or animal anatomy upon the addition of the amount of water necessary to harden said sheet.
Claim 2
Dependent Claim
98 words
A water-hardenable sheet useful as a splinting material for portions of the human and animal anatomy which comprises a flexible web having adhered thereto a cement-forming material, said cement-forming material comprising a water-soluble poly(carboxylic acid) or a precursor thereof that forms a poly(carboxylic acid) on contact with water and an ion-leachable inorganic particulate material, which together form a cement upon contact with water, said cement-forming material being present in an amount sufficient to form a splinting material for portions of the human or animal anatomy upon the addition of the amount of water necessary to harden said sheet.
Claim 3
Dependent Claim
16 words
A water-hardenable sheet according to claim 1 in which the flexible web has a porous structure.
Claim 4
Dependent Claim
17 words
A water-hardenable sheet according to claim 1 in which the flexible web comprises a cellulosic fibrous material.
Claim 5
Dependent Claim
20 words
A water-hardenable sheet according to claim 1 in which the poly(carboxylic acid) is a homopolymer or copolymer of acrylic acid.
Claim 6
Dependent Claim
16 words
A water-hardenable sheet according to claim 1 in which the precursor is a poly(carboxylic acid anhydride).
Claim 7
Dependent Claim
25 words
A water-hardenable sheet according to claim 1 in which the poly(carboxylic acid) or precursor thereof has an average molecular weight of from 10,000 to 100,000.
Claim 8
Dependent Claim
36 words
A water-hardenable sheet according to claim 1 in which the poly(carboxylic acid) or precursor thereof is in particulate form, and has a degree of fineness such that it will pass through a 150 B.S. mesh sieve.
Claim 9
Dependent Claim
36 words
A water-hardenable sheet according to claim 1 in which the ion-leachable inorganic particulate material is an oxide of a di- or poly-valent metal, or a salt of a weak acid and a di- or poly-valent metal.
Claim 10
Dependent Claim
14 words
A water-hardenable sheet according to claim 8, in which the oxide is zinc oxide.
Claim 11
Dependent Claim
18 words
A water-hardenable sheet according to claim 1 in which the ion-leachable inorganic particulate material is an aluminosilicate glass.
Claim 12
Dependent Claim
48 words
A water-hardenable sheet according to claim 10, in which the aluminosilicate glass has been prepared by fusing a mixture of alumina, silica, and calcium oxide together with up to 30% by weight, based on the total weight of the composition, of a fluoride, borate, phosphate, or carbonate flux.
Claim 13
Dependent Claim
16 words
A water-hardenable sheet according to claim 10, in which the aluminosilicate glass is a fluoroaluminosilicate glass.
Claim 14
Dependent Claim
30 words
A water-hardenable sheet according to claim 1 in which the ion-leachable inorganic particulate material has a degree of fineness such that it will pass through a 150 mesh B.S. sieve.
Claim 15
Dependent Claim
32 words
A water-hardenable sheet according to claim 1 in which the weight of the cement-forming material is from 60 to 90% of the total weight of the flexible web and the cement-forming material.
Claim 16
Dependent Claim
51 words
A water-hardenable sheet according to claim 14, in which the poly(carboxylic acid) or precursor thereof and the ion-leachable inorganic particulate material are present in the ratio of 1 to 100 parts by weight of ion-leachable inorganic particulate material to every 10 parts by weight of the poly(carboxylic acid) or precursor thereof.
Claim 17
Dependent Claim
26 words
A water-hardenable sheet according to claim 1 which further comprises a binder to assist the adherence of the ion-leachable inorganic particulate material to the flexible web.
Claim 18
Dependent Claim
21 words
A water-hardenable sheet according to claim 16, in which the binder is polyvinyl alcohol, polyvinyl acetate, or partially hydrolysed polyvinyl acetate.
Claim 19
Dependent Claim
35 words
A water-hardenable sheet according to claim 16, in which the binder is present in an amount of from 0.1 to 1% by weight based on the combined weight of the acid and the inorganic material.
Claim 20
Dependent Claim
13 words
A water-hardenable sheet according to claim 1 which further comprises an anti-shrinkage agent.
Claim 21
Dependent Claim
17 words
A water-hardenable sheet according to claim 19 in which said anti-shrinkage agent is an inert particulate filler.
Claim 22
Dependent Claim
15 words
A water-hardenable sheet according to claim 1 which further comprises a water soluble chelating agent.
Claim 23
Dependent Claim
17 words
A water-hardenable sheet according to claim 1 which further comprises a water insoluble polymer in particulate form.
Claim 24
Dependent Claim
18 words
A water-hardenable sheet according to claim 22, in which the water insoluble polymer has pendant carboxylic acid groups.
Claim 25
Dependent Claim
28 words
A water-hardenable sheet material according to claim 22 in which the water insoluble polymer is a copolymer of an unsaturated aliphatic carboxylic acid and an unsaturated aliphatic ester.
Claim 26
Dependent Claim
22 words
A water-hardenable sheet according to claim 22 in which the water insoluble polymer is a copolymer of methacrylic acid and ethyl acrylate.
Claim 27
Dependent Claim
54 words
A water-hardenable sheet according to claim 10, wherein said aluminosilicate glass has been prepared by fusing a mixture of 10 to 65% silica, 15 to 50% alumina, 0 to 50% calcium oxide and a fluorine-containing fluxing agent to provide fluorine in an amount of less than 14%, based on the weight of the composition.
Claim 28
Dependent Claim
16 words
A water-hardenable sheet according to claim 10, wherein the amount of fluorine is less than 8%.
Claim 29
Dependent Claim
27 words
A water-hardenable sheet according to claim 27 wherein the aluminosilicate glass has a degree of fineness such that it will pass through a 150 mesh B.S. screen.
Claim 30
Dependent Claim
21 words
A water-hardenable sheet according to claim 1 wherein said poly(carboxylic acid) is a copolymer of vinyl methyl ether and maleic anhydride.
Claim 31
Dependent Claim
69 words
A water-hardenable sheet according to claim 1 wherein the ion-leachable inorganic particulate material is a powder selected from the group consisting of an oxide of a di- or poly-valent metal, a salt of a weak acid and a di- or poly-valent metal and an aluminosilicate glass, and the weight of the cement-forming material is from about 5 to 95% by weight of the flexible web and the cement-forming material.
Claim 32
Dependent Claim
18 words
A water-hardenable sheet according to claim 30 in which the ion-leachable inorganic particulate powder is a fluoroaluminosilicate glass.
Claim 33
Dependent Claim
32 words
A water-hardenable sheet according to claim 30 in which the weight of the cement-forming material is from 60 to 90% of the total weight of the flexible web and the cement-forming material.
Claim 34
Dependent Claim
51 words
A water-hardenable sheet according to claim 32 in which the poly(carboxylic acid) or precursor thereof and the ion-leachable inorganic particulate powder are present in the ratio of 1 to 100 parts by weight of ion-leachable inorganic particulate powder to every 10 parts by weight of the poly(carboxylic acid) or precursor thereof.
Claim 35
Dependent Claim
20 words
A water-hardenable sheet according to claim 30, in which the poly(carboxylic acid) is a homopolymer or copolymer of acrylic acid.
Claim 36
Dependent Claim
22 words
A water-hardenable sheet according to claim 34 in which the poly(carboxylic acid) has an average molecular weight of from 10,000 to 100,000.
Claim 37
Dependent Claim
57 words
A substantially rigid sheet material comprising a flexible web and a poly(carboxylate) cement in layered relationship, the poly(carboxylate) cement having been formed by reaction in the presence of water of a water-soluble poly(carboxylic acid) or a precursor thereof that will be transformed into the poly(carboxylic acid) on contact with water, and an ion-leachable inorganic particulate cement-forming material.
Claim 38
Dependent Claim
57 words
A substantially rigid sheet material comprising a flexible web and a poly(carboxylate) cement in layered relationship, the poly(carboxylate) cement having been formed by reaction in the presence of water of a water-soluble poly(carboxylic acid) or a precursor thereof that will be transformed into the poly(carboxylic acid) on contact with water, and an ion-leachable inorganic particulate cement-forming material.
Claim 39
Dependent Claim
63 words
A process for the production of a water-hardenable sheet material, which comprises depositing on to a flexible web reactants that react together in the presence of water to form a poly(carboxylate) cement, said reactants being a water soluble poly(carboxylic acid) or a precursor thereof that will be transformed into the poly(carboxylic acid) on contact with water and an ion-leachable inorganic particulate cement-forming material.
Claim 40
Dependent Claim
63 words
A process for the production of a water-hardenable sheet material, which comprises depositing on to a flexible web reactants that react together in the presence of water to form a poly(carboxylate) cement, said reactants being a water soluble poly(carboxylic acid) or a precursor thereof that will be transformed into the poly(carboxylic acid) on contact with water and an ion-leachable inorganic particulate cement-forming material.
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) | 1981-07-24 | 1982-01-23 | 1982-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-24 | 1986-01-23 | 1986-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-24 | 1990-01-23 | 1990-07-25 | $7700.00 | Window Closed / Lapsed |