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Patent US4317681A successfully refreshed from Google Patents.
US4317681A
Expired / Lapsed
US
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Modifiers for ion-leachable cement compositions
Assignee: Johnson and Johnson
•
Filing: 1980-11-07
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Granted: 1982-03-02
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Expires: 2000-11-07
Abstract
Abstract A cementitious composition including dry ion-leachable glass powder and further including an agent for modifying the rate of setting. The agent is selected to include the d,l form of tartaric acid.
Inventors
- 👤 Charles H. Beede
- 👤 Richard N. Zirnite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:57
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/28; A; A61; A61F; A61F13/00; A61F13/04; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; A61K6/889; A61L; A61L15/00; A61L15/07; A61L15/12; A61L27/00; A61L27/40; A61L27/44; A61L27/446; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/083; C03C3/085; C03C3/087; Y; Y10; Y10S; Y10S528/00; Y10S528/92
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
18 words
In a dry cementitious composition comprising ion-leachable glass powder, the improvement wherein said composition further comprises d,l-tartaric acid.
Claim 2
Dependent Claim
18 words
In a dry cementitious composition comprising ion-leachable glass powder, the improvement wherein said composition further comprises d,l-tartaric acid.
Claim 3
Dependent Claim
30 words
The composition of claim 1 wherein said d,l-tartaric acid is present in a quantity of from about 0.05 to about 0.20 grams of d,l-tartaric acid per grams of glass powder.
Claim 4
Dependent Claim
30 words
The composition of claim 2 wherein said d,l-tartaric acid is present in a quantity of from about 0.06 to about 0.10 grams of d,l-tartaric acid per gram of glass powder.
Claim 5
Dependent Claim
13 words
The composition of claim 1 wherein said dry composition includes excess d-tartaric isomer.
Claim 6
Dependent Claim
13 words
The composition of claim 1 wherein said dry composition includes excess l-tartaric isomer.
Claim 7
Dependent Claim
12 words
The composition of claim 1 wherein said dry composition includes meso-tartaric acid.
Claim 8
Dependent Claim
25 words
The composition of either claim 4, 5 or 6 wherein the d,l-tartaric acid is at least 50% by weight of the total tartaric acid present.
Claim 9
Dependent Claim
11 words
The composition of claim 1 further comprising a proton donating compound.
Claim 10
Dependent Claim
14 words
The composition of claim 8 wherein said proton donating compound is a poly(carboxylic acid).
Claim 11
Dependent Claim
12 words
The composition of claim 9 wherein said poly(carboxylic acid) is poly(acrylic acid).
Claim 12
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 13
Dependent Claim
9 words
The composition of claim 1 in a dental cement.
Claim 14
Dependent Claim
10 words
The composition of claim 1 adhered to a bandage substrate.
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) | 1985-03-01 | 1985-08-31 | 1986-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-01 | 1989-08-31 | 1990-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-01 | 1993-08-31 | 1994-03-02 | $7700.00 | Window Closed / Lapsed |