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US4174334A
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Surgical cement compositions containing alumino borate glass and a polymer glass and a polymer containing recurring carboxylic or carboxylate groups
Assignee: Imperial Chemical Industries Ltd
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Filing: 1977-11-07
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Granted: 1979-11-13
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Expires: 1997-11-07
Abstract
Abstract Alumino-borate glasses containing a ternary oxide an alkaline earth or alkali metal oxide are used in powdered form with an organic polycarboxylic acid (preferably polyacrylic acid) to make improved surgical cements especially useful in dentistry.
Inventors
- 👤 Barry W. Bertenshaw
- 👤 Edward C. Combe
- 👤 David C. Tidy
- 👤 John N. C. Laycock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:03
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/40; A61L27/44; A61L27/446; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; A61K6/889; Y; Y10; Y10S; Y10S528/00; Y10S528/92
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
54 words
A cement composition comprising: (i) an alumino borate glass in powdered form containing fused oxides of aluminum, boron and a third oxide type comprising at least one alkali metal or alkaline earth metal oxide and (ii) a water soluble organic polymer comprising a polymer chain that contains recurring carboxylic acid or carboxylate ion groups.
Claim 2
Dependent Claim
54 words
A cement composition comprising: (i) an alumino borate glass in powdered form containing fused oxides of aluminum, boron and a third oxide type comprising at least one alkali metal or alkaline earth metal oxide and (ii) a water soluble organic polymer comprising a polymer chain that contains recurring carboxylic acid or carboxylate ion groups.
Claim 3
Dependent Claim
22 words
A composition as claimed in claim 1 wherein the third oxide is an oxide of magnesium, calcium, barium, strontium, zinc or lithium.
Claim 4
Dependent Claim
23 words
A composition as claimed in claim 2 wherein the alumino borate glass contains a fourth component which is an inorganic oxide or salt.
Claim 5
Dependent Claim
19 words
A composition as claimed in claim 3 wherein the fourth component is lead oxide, silica or a phosphorus oxide.
Claim 6
Dependent Claim
14 words
A composition as claimed in claim 3 wherein the third oxide is zinc oxide.
Claim 7
Dependent Claim
21 words
A composition as claimed in claim 1 wherein the alumino-borate glass powder is capable of passing through a 150 mesh sieve.
Claim 8
Dependent Claim
19 words
A composition as claimed in claim 6 wherein the powder is capable of passing through a 300 mesh sieve.
Claim 9
Dependent Claim
19 words
A composition as claimed in claim 1 wherein the organic polymer comprises a polymerised or copolymerised unsaturated carboxylic acid.
Claim 10
Dependent Claim
16 words
A composition as claimed in claim 8 wherein the polymer comprises polyacrylic acid or polymethacrylic acid.
Claim 11
Dependent Claim
26 words
A composition as claimed in claim 9 wherein the polymer is used in aqueous solution at a concentration in the range 10% to 60% by weight.
Claim 12
Dependent Claim
28 words
A composition as claimed in claim 10 wherein the weight of alumino-borate glass powder and the weight of polymer solution are in the ratio from 0.5:1 to 5:1.
Claim 13
Dependent Claim
16 words
A composition as claimed in claim 11 wherein the powder/liquid ratio is from 1.5:1 to 3:1.
Claim 14
Dependent Claim
15 words
An aqueous cement-forming composition comprising a composition as claimed in claim 1 mixed with water.
Claim 15
Dependent Claim
29 words
A cement-forming pack comprising at least the two selected parts of the composition as claimed in claim 1, the parts on mixing being capable of forming a hardening cement.
Claim 16
Dependent Claim
22 words
A dental cement, or dental filling or cavity lining material produced from a composition or cement-forming pack as claimed in claim 1.
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) | 1982-11-12 | 1983-05-14 | 1983-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-12 | 1987-05-14 | 1987-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-12 | 1991-05-14 | 1991-11-13 | $7700.00 | Window Closed / Lapsed |