US4693748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for staining material
Assignee: AGC Inc
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Filing: 1986-09-29
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Granted: 1987-09-15
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Expires: 2006-09-29
Abstract
Abstract A staining composition for use in manufacturing artificial tooth, etc. which is composed of Ca and P at their atomic ratio (Ca/P) in a range of from 0.05 to 0.33; and 5 to 28 mol % of Al 2 O 3 .
Inventors
- 👤 Shigeyoshi Kobayashi
- 👤 Tsuneo Manabe
- 👤 Ichiro Yanagisawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:03
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C3/16; C03C3/17; A; A61; A61K; A61K6/00; A61K6/15; A61K6/16; A61K6/70; A61K6/71; A61K6/77; A61K6/78; A61K6/80; A61K6/831; A61K6/838; A61K6/849; A61K6/864; A61K6/873; A61K6/876
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
41 words
A composition for a calcium phosphate type staining material, which is composed of Ca and P at their atomic ratio (Ca/P) in a range of from 0.05 to 0.33; and 5 to 28 mol % of Al 2 O 3 .
Claim 2
Dependent Claim
41 words
A composition for a calcium phosphate type staining material, which is composed of Ca and P at their atomic ratio (Ca/P) in a range of from 0.05 to 0.33; and 5 to 28 mol % of Al 2 O 3 .
Claim 3
Dependent Claim
42 words
The composition according to claim 1, wherein the atomic ratio of Ca to P is in a range of from 0.07 to 0.25, and the content of Al 2 O 3 is in a range of from 13 to 22 mol %.
Claim 4
Dependent Claim
29 words
The composition according to claim 1, further including a coloring component in a range of from 0.02 to 10% by weight relative to the total quantity of said composition.
Claim 5
Dependent Claim
21 words
The composition according to claim 3, wherein said coloring component is in a range of from 0.05 to 5% by weight.
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) | 1990-09-14 | 1991-03-16 | 1991-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-14 | 1995-03-16 | 1995-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-14 | 1999-03-16 | 1999-09-15 | $7700.00 | Window Closed / Lapsed |