Patent US4670053A successfully refreshed from Google Patents.
US4670053A
Expired / Lapsed
US
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Molding material and process for its preparation
Assignee: Kulzer GmbH
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Filing: 1985-06-11
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Granted: 1987-06-02
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Expires: 2005-06-11
Abstract
Abstract Impression material in the form of a powder, which, on mixing with water, provides a paste which cures to a solid consistency, the material in the form of a powder being made dust-free by additions of a coating agent, which material is characterized in that it contains paraffin as an additive.
Inventors
- 👤 Dieter Kooke
- 👤 Peter Schwabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:18
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/90
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
57 words
In an impression material in the form of a powder, which on mixing with water provides a paste which sets to a solid consistency, comprising a powder containing a water-soluble alginate or ingredients which form such an alginate, which powder is made dust-free by addition of a coating agent, the improvement wherein the coating agent comprises paraffin.
Claim 2
Dependent Claim
57 words
In an impression material in the form of a powder, which on mixing with water provides a paste which sets to a solid consistency, comprising a powder containing a water-soluble alginate or ingredients which form such an alginate, which powder is made dust-free by addition of a coating agent, the improvement wherein the coating agent comprises paraffin.
Claim 3
Dependent Claim
17 words
An impression material according to claim 1, wherein the paraffin is present in about 0.5-7% by weight.
Claim 4
Dependent Claim
17 words
An impression material according to claim 1, wherein the paraffin is present in about 2.5-5% by weight.
Claim 5
Dependent Claim
19 words
An impression material according to claim 1, wherein the paraffin has a viscosity between 10 and 100,000 cP/20° C.
Claim 6
Dependent Claim
19 words
An impression material according to claim 1, wherein the paraffin has a viscosity between 20 and 100,000 cP/20° C.
Claim 7
Dependent Claim
34 words
An impression material according to claim 1, wherein the powder contains a metal salt and alginic acid which forms therewith a salt which is insoluble in water, a curing retardant and an inorganic filler.
Claim 8
Dependent Claim
35 words
A process for the preparation of a molding material according to claim 1, comprising adding paraffin with stirring to a mixture of the components in the form of a powder, or to a portion thereof.
Claim 9
Dependent Claim
16 words
A process according to claim 7, wherein the paraffin treatment is carried out at 50°-100° C.
Claim 10
Dependent Claim
60 words
In the making of a dental impression by mixing a powder impression material with water to form a moldable paste, and taking a dental impression which said paste and allowing it to set to a solid consistency, the improvement wherein said powder impression material contains a paraffin as a coating agent, whereby the mixing with water does not generate dust.
Claim 11
Dependent Claim
60 words
In the making of a dental impression by mixing a powder impression material with water to form a moldable paste, and taking a dental impression which said paste and allowing it to set to a solid consistency, the improvement wherein said powder impression material contains a paraffin as a coating agent, whereby the mixing with water does not generate dust.
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) | 1990-06-01 | 1990-12-01 | 1991-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-01 | 1994-12-01 | 1995-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-01 | 1998-12-01 | 1999-06-02 | $7700.00 | Window Closed / Lapsed |