Patent US4851146A successfully refreshed from Google Patents.
US4851146A
Expired / Lapsed
US
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Phosphonic acid derivative based agents for cleaning and dissolving tartar of removable oral prostheses
Assignee: GC Corp
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Filing: 1987-05-20
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Granted: 1989-07-25
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Expires: 2007-05-20
Abstract
Abstract An agent for cleaning and dissolving tartar or removable oral prostheses comprises a solution of a phosphonic acid base chelating agent or agents as the active agents in water, the phosphonic acid base chelating agent or agents being selected from the group consisting of aminotrimethylphosphonic acid, hydroxyethylidenephosphonic acid and ehtylenediaminetetramethylphosphonic acid as well as their alkali metal salts, and being contained in water in an amount of 15 to 90 weight %, the solution being of a pH of 7 or lower.
Inventors
- 👤 Toshio Hosoi
- 👤 Kazuhiro Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:48
CPC Classifications
A; A61; A61Q; A61Q11/00; A61Q11/02; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/55; Y; Y10; Y10S; Y10S252/00; Y10S252/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
70 words
An agent for cleansing and dissolving the tartar of removable oral prostheses consisting of a solution in water in amount of 35 to 90 wt.% of a mixture of aminotrimethylphophonic acid and hydroxyethylidenephosphonic acid or their alkali metal salts and an effective amount of at least one of a surfactant, a deodorant, a disinfectant, a deodorizer or a perfume, balance water, the solution having a pH of 7 or lower.
Claim 2
Dependent Claim
70 words
An agent for cleansing and dissolving the tartar of removable oral prostheses consisting of a solution in water in amount of 35 to 90 wt.% of a mixture of aminotrimethylphophonic acid and hydroxyethylidenephosphonic acid or their alkali metal salts and an effective amount of at least one of a surfactant, a deodorant, a disinfectant, a deodorizer or a perfume, balance water, the solution having a pH of 7 or lower.
Claim 3
Dependent Claim
76 words
An agent for cleaning and dissolving tartar of removable oral prostheses consisting of a solution in water in an amount of 35 to 90 wt.% of a mixture of hydroxyethylidenephosphonic acid and ethylenediaminetetramethylphosphonic acid, or a mixture of hydroxyethylidene phosphonic acid, ethylenediaminetetramethylphosphonic acid and aminotrimethylphosphonic acid, or their alkali metal salts, and an effective amount of at least one of a surfactant, disinfectant, deodorant, deodorizer and perfume, the solution having a pH not greater than 7.
Claim 4
Dependent Claim
76 words
An agent for cleaning and dissolving tartar of removable oral prostheses consisting of a solution in water in an amount of 35 to 90 wt.% of a mixture of hydroxyethylidenephosphonic acid and ethylenediaminetetramethylphosphonic acid, or a mixture of hydroxyethylidene phosphonic acid, ethylenediaminetetramethylphosphonic acid and aminotrimethylphosphonic acid, or their alkali metal salts, and an effective amount of at least one of a surfactant, disinfectant, deodorant, deodorizer and perfume, the solution having a pH not greater than 7.
Claim 5
Dependent Claim
50 words
An agent for cleaning and dissolving tartar of removable oral prostheses consisting of the following composition: Hydroxyethylidenediphosphonic acid: 10 weight % Ethylenediaminetetramethylphosphonic acid tetrasodium: 15.0 weight % Aminotrimethylphosphonic acid hexasodium: 10 weight % Purified water: 63.5 weight % Sodium lauryl sulfate: 1.0 weight % Potassium chloride isocyanurate: 0.5 weight %.
Claim 6
Dependent Claim
50 words
An agent for cleaning and dissolving tartar of removable oral prostheses consisting of the following composition: Hydroxyethylidenediphosphonic acid: 10 weight % Ethylenediaminetetramethylphosphonic acid tetrasodium: 15.0 weight % Aminotrimethylphosphonic acid hexasodium: 10 weight % Purified water: 63.5 weight % Sodium lauryl sulfate: 1.0 weight % Potassium chloride isocyanurate: 0.5 weight %.
References Cited (Backward Citations)
GB1110987A
Cited
US3934002A
Cited
US3959458A
Cited
GB2090855A
Cited
GB2095694A
Cited
US4540504A
Cited
US4701223A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-24 | 1993-01-23 | 1993-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-24 | 1997-01-23 | 1997-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-24 | 2001-01-23 | 2001-07-25 | $7700.00 | Window Closed / Lapsed |