US4383052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-Methacryloxyethane-1,1-diphosphonic acid and its salts and dental adhesive composition containing same
Assignee: Lion Corp
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Filing: 1981-12-14
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Granted: 1983-05-10
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Expires: 2001-12-14
Abstract
Abstract A novel compound, 1-methacryloxyethane-1,1-diphosphonic acid and its salts provide improved adhesion to tooth substances when used as a polymerizable monomer in a dental adhesive composition.
Inventors
- 👤 Moriaki Higo
- 👤 Yasuo Kikuchi
- 👤 Shinya Kitoh
- 👤 Shin-ichi Suzuki
- 👤 Haruhiko Toda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:45
CPC Classifications
C; C08; C08F; C08F30/00; C08F30/02; A; A61; A61K; A61K6/00; A61K6/30; A61K6/80; A61K6/884; A61K6/887; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3839; C07F9/386
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
10 words
1-Methacryloxyethane-1,1-diphosphonic acid having the formula (1) and its salts. ##STR16##
Claim 2
Dependent Claim
10 words
1-Methacryloxyethane-1,1-diphosphonic acid having the formula (1) and its salts. ##STR16##
Claim 3
Dependent Claim
25 words
A dental adhesive composition comprising at least one compound selected from the group consisting of 1-methacryloxyethane-1,1-diphosphonic acid having the formula (1) and its salts. ##STR17##
Claim 4
Dependent Claim
25 words
A dental adhesive composition comprising at least one compound selected from the group consisting of 1-methacryloxyethane-1,1-diphosphonic acid having the formula (1) and its salts. ##STR17##
Claim 5
Dependent Claim
29 words
The composition according to claim 2, wherein said compound of the formula (1) or a salt thereof is present in said composition in an amount of 1-15% by weight.
Claim 6
Dependent Claim
41 words
The composition according to claim 2, wherein said compound of the formula (1) or a salt thereof is present in said composition in combination with another polymerizable monomer in an amount of 1-30% by weight based on the other polymerizable monomer.
Claim 7
Dependent Claim
35 words
The composition according to claim 4, wherein said compound of the formula (1) or a salt thereof is present in said composition in an amount of 2-15% by weight based on the other polymerizable monomer.
Claim 8
Dependent Claim
17 words
The composition according to claim 2, which comprises 10-45% by weight of a polymerizable monomer or monomers.
Claim 9
Dependent Claim
17 words
The composition according to claim 3, which comprises 10-45% by weight of a polymerizable monomer or monomers.
Claim 10
Dependent Claim
17 words
The composition according to claim 4, which comprises 10-45% by weight of a polymerizable monomer or monomers.
Claim 11
Dependent Claim
15 words
The composition according to claim 2, which comprises 50-85% by weight of an inorganic filler.
References Cited (Backward Citations)
US3766252A
Cited
US4259075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-09 | 1986-11-08 | 1987-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-09 | 1990-11-08 | 1991-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-09 | 1994-11-08 | 1995-05-10 | $7700.00 | Window Closed / Lapsed |