US4836853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Algin based dental impression material containing biocidal component
Assignee: Dentsply GmbH
•
Filing: 1988-07-08
•
Granted: 1989-06-06
•
Expires: 2008-07-08
Abstract
Abstract A dental impression composition comprising alginate material and biocidal component. A method for reducing microorganism contamination in alginate dental impressions comprising preparing a mixture comprising alginate, water and biocide.
Inventors
- 👤 Hans-Peter K. Gribi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:28
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/90; Y; Y10; Y10S; Y10S264/00; Y10S264/30
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
45 words
A dental impression material comprising a water soluble salt of alginic acid and a setting reactant, the improvement comprising the addition of a biocide comprising about 0.3 to about 6.5 percent by weight of said dental impression material wherein said biocide is didecyldimethyl ammonium chloride.
Claim 2
Dependent Claim
45 words
A dental impression material comprising a water soluble salt of alginic acid and a setting reactant, the improvement comprising the addition of a biocide comprising about 0.3 to about 6.5 percent by weight of said dental impression material wherein said biocide is didecyldimethyl ammonium chloride.
Claim 3
Dependent Claim
48 words
A dental impression material comprising a water soluble salt of alginic acid, a setting reactant, a retarder and fillers, the improvement comprising the addition of a biocide comprising about 0.3 to about 6.5 percent by weight of said dental impression material wherein said biocide is didecyldimethyl ammonium chloride.
Claim 4
Dependent Claim
48 words
A dental impression material comprising a water soluble salt of alginic acid, a setting reactant, a retarder and fillers, the improvement comprising the addition of a biocide comprising about 0.3 to about 6.5 percent by weight of said dental impression material wherein said biocide is didecyldimethyl ammonium chloride.
Claim 5
Dependent Claim
68 words
In a dental impression material comprising a water soluble salt of alginic acid, a setting reactant, a retarder, fillers, a surface hardening agent and a non-volatile, non-aqueous compound to prevent fine powders from dusting during dispensing, measuring and mixing, the improvement comprising the addition of a biocide comprising didecyldimethyl ammonium chloride in the amount of about 0.3 to about 6.5 percent by weight of said dental impression material.
Claim 6
Dependent Claim
68 words
In a dental impression material comprising a water soluble salt of alginic acid, a setting reactant, a retarder, fillers, a surface hardening agent and a non-volatile, non-aqueous compound to prevent fine powders from dusting during dispensing, measuring and mixing, the improvement comprising the addition of a biocide comprising didecyldimethyl ammonium chloride in the amount of about 0.3 to about 6.5 percent by weight of said dental impression material.
Claim 7
Dependent Claim
68 words
The dental impression material of claim 2 wherein said biocide comprises about 0.3 to about 6.5 percent by weight, said alginic acid salt comprises about 5 to about 20 percent by weight, said filler comprises about 40 to about 70 percent by weight and said setting reactant comprises about 8 to about 30 percent by weight and said retarder comprises about 0.5 to about 10 percent by weight.
Claim 8
Dependent Claim
22 words
The dental impression material of claim 2 wherein said alginate and said biocidal component are included in a dry powder precursor composition.
Claim 9
Dependent Claim
15 words
The dental impression material of claim 2 in the form of a set dental impression.
Claim 10
Dependent Claim
68 words
The dental impression material of claim 3 wherein said biocide comprises about 0.3 to about 6.5 percent by weight, said alginic acid salt comprises about 5 to about 20 percent by weight, said filler comprises about 40 to about 70 percent by weight and said setting reactant comprises about 8 to about 30 percent by weight and said retarder comprises about 0.5 to about 10 percent by weight.
Claim 11
Dependent Claim
22 words
The dental impression material of claim 3 wherein said alginate and said biocidal component are included in a dry powder precursor composition.
Claim 12
Dependent Claim
15 words
The dental impression material of claim 3 in the form of a set dental impression.
References Cited (Backward Citations)
CA871771A
Cited
GB936091A
Cited
US3836669A
Cited
US3845216A
Cited
CA983190A
Cited
US3888947A
Cited
US3850864A
Cited
DE2131964A1
Cited
US3868340A
Cited
US3964164A
Cited
DE2419887A1
Cited
US4073888A
Cited
US4060421A
Cited
CA1143890A
Cited
US4182829A
Cited
CA1123547A
Cited
CA1106525A
Cited
CA1106524A
Cited
US4339279A
Cited
US4287323A
Cited
EP0051691A1
Cited
CA1179094A
Cited
US4315779A
Cited
US4394172A
Cited
US4407984A
Cited
EP0053442A2
Cited
US4404296A
Cited
US4466936A
Cited
EP0057839A1
Cited
US4444790A
Cited
US4450174A
Cited
US4543372A
Cited
DE3423567A1
Cited
EP0188040A1
Cited
EP0195224A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-05 | 1992-12-05 | 1993-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-05 | 1996-12-05 | 1997-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-05 | 2000-12-05 | 2001-06-06 | $7700.00 | Window Closed / Lapsed |