US5360770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluoride ion-leachable glasses and dental cement compositions containing them
Assignee: Den Mat Holdings LLC
•
Filing: 1992-01-07
•
Granted: 1994-11-01
•
Expires: 2012-01-07
Abstract
Abstract A glass composition, containing barium oxide, which provides a source of leachable fluoride and which can be incorporated into a dental cement composition which, when cured, is radiopaque and translucent.
Inventors
- 👤 Thomas C. Chadwick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:27
CPC Classifications
C; C03; C03C; C03C8/00; C03C8/02; C03C8/08; A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; A61K6/889; C03C3/00; C03C3/04; C03C3/062; C03C4/00; C03C4/0007; C03C4/0035; C03C8/06
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
43 words
A glass composition consisting essentially of the following ingredients by molar percent: ______________________________________
SiO.sub.2
17.6-19.7
P.sub.2 O.sub.5
0.8-3.5
Al.sub.2 O.sub.3
9.0-11.0
Na.sub.2 O
0.5-3.0
MO 17.9-19.7
F 42.2-56.1
______________________________________ wherein MO is selected from the group consisting of BaO, BaO--CaO, BaO--SrO, and BaO--CaO--SrO.
Claim 2
Dependent Claim
43 words
A glass composition consisting essentially of the following ingredients by molar percent: ______________________________________
SiO.sub.2
17.6-19.7
P.sub.2 O.sub.5
0.8-3.5
Al.sub.2 O.sub.3
9.0-11.0
Na.sub.2 O
0.5-3.0
MO 17.9-19.7
F 42.2-56.1
______________________________________ wherein MO is selected from the group consisting of BaO, BaO--CaO, BaO--SrO, and BaO--CaO--SrO.
Claim 3
Dependent Claim
11 words
The glass composition according to claim 1, wherein MO is BaO--CaO.
Claim 4
Dependent Claim
20 words
The glass composition according to claim 2, wherein the molar ratio of BaO to CaO is not less than 0.334.
Claim 5
Dependent Claim
17 words
The glass composition according to claim 3, wherein the molar ratio of BaO to CaO is 1:1.
Claim 6
Dependent Claim
11 words
The glass composition according to claim 1, wherein MO is BaO--SrO.
Claim 7
Dependent Claim
20 words
The glass composition according to claim 5, wherein the molar ratio of BaO to SrO is not less than 0.02.
Claim 8
Dependent Claim
17 words
The glass composition according to claim 6, wherein the molar ratio of BaO to SrO is 1:1.
Claim 9
Dependent Claim
11 words
The glass composition according to claim 1, wherein MO is BaO--CaO--SrO.
Claim 10
Dependent Claim
33 words
The glass composition according to claim 8, wherein the molar ratio of BaO to (CaO+SrO) is not less than 0.02 and the molar ratio of CaO to (SrO+BaO) is not greater than 3.0.
Claim 11
Dependent Claim
15 words
The glass composition according to claim 9, wherein the molar ratio of BaO--CaO--SrO is 1:1:1.
Claim 12
Dependent Claim
43 words
A glass composition consisting essentially of the following ingredients by molar percent: ______________________________________
SiO.sub.2
20
P.sub.2 O.sub.5
2
Al.sub.2 O.sub.3
10
Na.sub.2 O
2
MO 18
F 48
______________________________________ wherein MO is selected from the group consisting of BaO, BaO--CaO, BaO--SrO, and BaO--CaO--SrO.
Claim 13
Dependent Claim
43 words
A glass composition consisting essentially of the following ingredients by molar percent: ______________________________________
SiO.sub.2
20
P.sub.2 O.sub.5
2
Al.sub.2 O.sub.3
10
Na.sub.2 O
2
MO 18
F 48
______________________________________ wherein MO is selected from the group consisting of BaO, BaO--CaO, BaO--SrO, and BaO--CaO--SrO.
Claim 14
Dependent Claim
11 words
The glass composition according to claim 11, wherein MO is BaO.
Claim 15
Dependent Claim
11 words
The glass composition according to claim 11, wherein MO is BaO--CaO.
Claim 16
Dependent Claim
20 words
The glass composition according to claim 13, wherein the molar ratio of BaO to CaO is not less than 0.334.
Claim 17
Dependent Claim
17 words
The glass composition according to claim 14, wherein the molar ratio of BaO to CaO is 1:1.
Claim 18
Dependent Claim
11 words
The glass composition according to claim 11, wherein MO is BaO--SrO.
Claim 19
Dependent Claim
20 words
The glass composition according to claim 16, wherein the molar ratio of BaO to SrO is not less than 0.02.
Claim 20
Dependent Claim
17 words
The glass composition according to claim 17, wherein the molar ratio of BaO to SrO is 1:1.
Claim 21
Dependent Claim
11 words
The glass composition according to claim 11, wherein MO is BaO--CaO--SrO.
Claim 22
Dependent Claim
33 words
The glass composition according to claim 19, wherein the molar ratio of BaO to (CaO+SrO) is not less than 0.02 and the molar ratio of CaO to (SrO+BaO) is not greater than 3.0.
References Cited (Backward Citations)
US4775592A
Cited
EP0241277A2
Cited
US4900697A
Cited
US4808228A
Cited
US5051453A
Cited
US5009709A
Cited
US5120340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-10-31 | 1998-05-02 | 1998-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-31 | 2002-05-02 | 2002-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-31 | 2006-05-02 | 2006-11-01 | $7700.00 | Window Closed / Lapsed |