Patent US4143018A successfully refreshed from Google Patents.
US4143018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cements
Assignee: BTG International Ltd
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Filing: 1975-10-16
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Granted: 1979-03-06
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Expires: 1995-10-16
Abstract
Abstract A poly(carboxylate) cement pack comprises as one component a water soluble poly(carboxylic acid) or a precursor thereof, and as another component an aluminosilicate glass, the ratio of acidic to basic oxides in the glass being selected such that the glass will react with a poly(carboxylic acid) in the presence of water to form a poly(carboxylate) cement.
Inventors
- 👤 Stephen Crisp
- 👤 Alan D. Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:35
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/062; A; A61; A61K; A61K6/00; A61K6/80; A61K6/849; A61K6/876; A61K6/884; A61K6/887; A61K6/889; C03C12/00; C03C3/076; C03C3/083; C03C3/085; C03C3/087; C03C3/11; C03C3/112; C03C4/00; C03C4/0035
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
77 words
A water hardenable cement composition which comprises a poly(carboxylic acid) or anhydride thereof which forms the poly(carboxylic acid) in the presence of water, an aluminosilicate glass comprising from 0 up to 8 percent by weight of fluorine, the ratio of acidic to basic oxides in the glass being from 0.1 to 3.0 that the glass will react with said poly(carboxylic acid) in the presence of water to form a poly(carboxylic) cement, and a water soluble chelating agent.
Claim 2
Dependent Claim
77 words
A water hardenable cement composition which comprises a poly(carboxylic acid) or anhydride thereof which forms the poly(carboxylic acid) in the presence of water, an aluminosilicate glass comprising from 0 up to 8 percent by weight of fluorine, the ratio of acidic to basic oxides in the glass being from 0.1 to 3.0 that the glass will react with said poly(carboxylic acid) in the presence of water to form a poly(carboxylic) cement, and a water soluble chelating agent.
Claim 3
Dependent Claim
17 words
A composition, according to claim 1, in which the poly(carboxylic acid) is a polymer of acrylic acid.
Claim 4
Dependent Claim
20 words
A composition, according to claim 1, in which the poly(carboxylic acid) is a copolymer of acrylic acid and itaconic acid.
Claim 5
Dependent Claim
49 words
A composition, according to claim 1, in which the aluminosilicate glass has a composition comprising from 10 to 65% by weight of silica, from 15 to 50% by weight of alumina and from 0 to 50% by weight of calcium oxide, based on the total weight of the composition.
Claim 6
Dependent Claim
43 words
A composition, according to claim 4, in which the aluminosilicate glass has a composition in which the weight ratio of calcium oxide to silica is greater than 0.92 or in which the weight ratio of calcium oxide to alumina is less than 0.72.
Claim 7
Dependent Claim
15 words
A composition, according to claim 1, in which the glass has a composition comprising fluorine.
Claim 8
Dependent Claim
34 words
A composition, according to claim 1, in which the aluminosilicate glass is in the form of a powder having a degree of fineness such that it will pass through a 150 mesh B.S. sieve.
Claim 9
Dependent Claim
30 words
A composition, according to claim 1, in which the poly(carboxylic acid) is in the form of an aqueous solution containing from 20 to 65% by weight of the poly(carboxylic acid).
Claim 10
Dependent Claim
23 words
A composition, according to claim 10, in which the weight ratio of aluminosilicate glass to said equeous solution is from 0.5:1 to 5:1.
Claim 11
Dependent Claim
60 words
A composition, according to claim 8, in which the aluminosilicate glass is present in an amount of from 15 to 85% by weight, the poly(carboxylic acid) is present in an amount of from 3 to 50% by weight, and water is present in an amount of from 5 to 70% by weight, based on the total weight of the composition.
Claim 12
Dependent Claim
87 words
A process for the preparation of a poly(carboxylate) cement which comprises mixing a water soluble poly(carboxylic acid) or anhydride thereof which forms the poly(carboxylic acid) in the presence of water with an aluminosilicate glass comprising from 0 up to 8 per cent by weight of fluorine and a water soluble chelating agent in the presence of water, the ratio of acidic to basic oxides in the glass being from 0.1 to 3.0 such that the glass will react with said poly(carboxylic acid) to form a poly(carboxylate) cement.
Claim 13
Dependent Claim
87 words
A process for the preparation of a poly(carboxylate) cement which comprises mixing a water soluble poly(carboxylic acid) or anhydride thereof which forms the poly(carboxylic acid) in the presence of water with an aluminosilicate glass comprising from 0 up to 8 per cent by weight of fluorine and a water soluble chelating agent in the presence of water, the ratio of acidic to basic oxides in the glass being from 0.1 to 3.0 such that the glass will react with said poly(carboxylic acid) to form a poly(carboxylate) cement.
Claim 14
Dependent Claim
17 words
A process according to claim 11, in which the poly(carboxylic acid) is a polymer of acrylic acid.
Claim 15
Dependent Claim
20 words
A process according to claim 11, in which the poly(carboxylic acid) is a copolymer of acrylic acid and itaconic acid.
Claim 16
Dependent Claim
48 words
A process according to claim 11, in which the glass has a composition comprising from 10 to 65% by weight of silica, from 15 to 50% by weight of alumina and from 0 to 50% by weight of calcium oxide, based on the total weight of the composition.
Claim 17
Dependent Claim
43 words
A process according to claim 11, in which the aluminosilicate glass has a composition in which the weight ratio of calcium oxide to silica is greater than 0.92 or in which the weight ratio of calcium oxide to alumina is less than 0.72.
Claim 18
Dependent Claim
15 words
A process according to claim 11, in which the glass has a composition comprising fluorine.
Claim 19
Dependent Claim
33 words
A process according to claim 11, in which the aluminosilicate glass is in powder form, the powder having a degree of fineness such that it will pass through a 150 mesh B.S. sieve.
Claim 20
Dependent Claim
30 words
A process according to claim 11, in which the poly(carboxylic acid) is in the form of an aqueous solution, comprising from 20 to 65% by weight of the poly(carboxylic acid).
Claim 21
Dependent Claim
27 words
A process according to claim 18, in which the aluminosilicate glass and the poly(carboxylic acid) solution are mixed in a weight ratio of from 0.5:1 to 5:1.
Claim 22
Dependent Claim
60 words
A process according to claim 11, in which the aluminosilicate glass is present in an amount of from 15 to 85% by weight, the poly(carboxylic acid) is present in an amount of from 3 to 50% by weight, and water is present in an amount of from 5 to 70% by weight, based on the total weight of the composition.
Claim 23
Dependent Claim
17 words
A process accordingly to claim 13 in which the aluminosilicate glass is a gehlenite or anorthite glass.
Claim 24
Dependent Claim
11 words
A poly(carboxylate) cement produced by the process accroding to claim 11.
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) | 1982-03-05 | 1982-09-04 | 1983-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-05 | 1986-09-04 | 1987-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-05 | 1990-09-04 | 1991-03-06 | $7700.00 | Window Closed / Lapsed |