US4324591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modifying agents for ion-leachable cement compositions
Assignee: Johnson and Johnson
•
Filing: 1980-11-07
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Granted: 1982-04-13
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Expires: 2000-11-07
Abstract
Abstract A cementitious composition is provided which includes a dry ion-leachable glass powder and further includes an essentially water-insoluble non-hydroxylic polycarboxylic aromatic compound. The composition is usable in orthopedic bandages, and particularly those bandages which are activated by dipping the substrate carrying the compound into a water-containing vessel to activate the compound.
Inventors
- 👤 Charles H. Beede
- 👤 Richard N. Zirnite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:04
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/07; A61L15/12; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; A61K6/889; A61L27/00; A61L27/40; A61L27/44; A61L27/446
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
40 words
In a cementitious composition comprising dry, ion-leachable glass powder, the improvement wherein said composition further comprises an essentially water insoluble, non-hydroxylic polycaroxylic aromatic compound having a solubility of less than 5 grams per 100 grams of water at room temperature.
Claim 2
Dependent Claim
40 words
In a cementitious composition comprising dry, ion-leachable glass powder, the improvement wherein said composition further comprises an essentially water insoluble, non-hydroxylic polycaroxylic aromatic compound having a solubility of less than 5 grams per 100 grams of water at room temperature.
Claim 3
Dependent Claim
51 words
The composition of claim 1 wherein the polycarboxylic aromatic compound is a polycarboxylic aromatic compound having the formula: ##STR3## wherein R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 are selected from the group consisting of --H, --COOH, and --CH 2 COOH.
Claim 4
Dependent Claim
15 words
The composition of claim 2 wherein said polycarboxylic aromatic compound is a bicarboxylic aromatic acid.
Claim 5
Dependent Claim
13 words
The composition of claim 3 wherein said bicarboxylic aromatic acid is phthalic acid.
Claim 6
Dependent Claim
13 words
The composition of claim 4 wherein said bicarboxylic aromatic acid is isophthalic acid.
Claim 7
Dependent Claim
15 words
The composition of claim 2 wherein said polycarboxylic aromatic compound is a tri-carboxylic aromatic acid.
Claim 8
Dependent Claim
13 words
The composition of claim 6 wherein said tri-carboxylic aromatic acid is hemiomellatic acid.
Claim 9
Dependent Claim
13 words
The composition of claim 6 wherein said tri-carboxylic aromatic acid is trimecic acid.
Claim 10
Dependent Claim
13 words
The composition of claim 6 wherein said tri-carboxylic aromatic acid is trimellitic acid.
Claim 11
Dependent Claim
14 words
The composition of claim 2 wherein said polycarboxylic aromatic compound is a tetra-carboxylic acid.
Claim 12
Dependent Claim
12 words
The composition of claim 10 wherein said tetracarboxylic acid is pyromellitic acid.
Claim 13
Dependent Claim
14 words
The composition of claim 2 wherein said polycarboxylic aromatic compound is 1,4-phenylene diacetic acid.
Claim 14
Dependent Claim
27 words
The composition of claim 1 wherein said polycarboxylic aromatic compound is present in the ratio of about 0.01 grams to about 0.1 per gram of ion-leachable glass.
Claim 15
Dependent Claim
27 words
The composition of claim 2 wherein said polycarboxylic aromatic compound is present in the ratio of about 0.07 to about 0.09 grams per gram of ion-leachable glass.
Claim 16
Dependent Claim
11 words
The composition of claim 1 further comprising a proton donating compound.
Claim 17
Dependent Claim
14 words
The composition of claim 15 wherein said proton donating compound is a poly(carboxylic acid).
Claim 18
Dependent Claim
12 words
The composition of claim 16 wherein said poly(carboxylic acid) is poly(arylic acid).
Claim 19
Dependent Claim
35 words
The composition of claim 1 wherein said glass powder is formed from molten inorganic compounds selected from the oxides of alkali, alkaline earth, aluminum and zinc metals and mixtures of these in combination with quartz.
Claim 20
Dependent Claim
9 words
The composition of claim 1 in a dental cement.
Claim 21
Dependent Claim
10 words
The composition of claim 1 adhered to a bandage substrate.
References Cited (Backward Citations)
US4174334A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-04-12 | 1985-10-12 | 1986-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-12 | 1989-10-12 | 1990-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-12 | 1993-10-12 | 1994-04-13 | $7700.00 | Window Closed / Lapsed |