US4610631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of fillings for teeth
Assignee: Evonik Operations GmbH
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Filing: 1985-01-28
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Granted: 1986-09-09
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Expires: 2005-01-28
Abstract
Abstract Powder of a ductile, mouth resistant metal such as silver, platinum, palladium, aluminum, or titanium, or an alloy thereof, or a cold weldable, mouth resistant synthetic resin, such as a polyacrylate or methacrylate, polycarbonate or polysulfone is worked to a paste with a plastic organic binder which liquifies at 20° to 45° C. This paste is hardened in the tooth cavity by ultrasonic action.
Inventors
- 👤 Hans-Hermann Beyer
- 👤 Walter Diehl
- 👤 Karlheinz Eckert
- 👤 Kurt Eiermann
- 👤 Hans-Martin Ringelstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:55
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/80; A61K6/84; A61K6/844; A61K6/884
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
78 words
In a process for the production of a filling in a tooth by inserting a powder into the cavity and subsequently mechanically hardening same, the improvement comprising employing a powder comprising a ductile, mouth resistant metal, metal alloy or a cold weldable mouth resistance synthetic resin which has been worked into a paste with a water or saliva soluble plastic organic binder that liquifies at 20° to 45° C. and carrying out the mechanical hardening by ultrasonic action.
Claim 2
Dependent Claim
78 words
In a process for the production of a filling in a tooth by inserting a powder into the cavity and subsequently mechanically hardening same, the improvement comprising employing a powder comprising a ductile, mouth resistant metal, metal alloy or a cold weldable mouth resistance synthetic resin which has been worked into a paste with a water or saliva soluble plastic organic binder that liquifies at 20° to 45° C. and carrying out the mechanical hardening by ultrasonic action.
Claim 3
Dependent Claim
24 words
A process according to claim 1 wherein the binder comprises 0.5 to 5 wt. % of polyethylene glycol of molecular weight 600 to 1500.
Claim 4
Dependent Claim
31 words
A process according to claim 2 wherein the powder is selected from the group consisting of silver, platinum, palladium, aluminum, titanium, an alloy thereof, polyacrylate, polymethacrylate, polycarbonate, polysulfone and isotactic polypropylene.
Claim 5
Dependent Claim
31 words
A process according to claim 1 wherein the powder is selected from the group consisting of silver, platinum, palladium, aluminum, titanium, an alloy thereof, polyacrylate, polymethacrylate, polycarbonate, polysulfone and isotactic polypropylene.
Claim 6
Dependent Claim
25 words
A process according to claim 4 wherein the powder is selected from the group consisting of silver, platinum, palladium, aluminum, titanium and an alloy thereof.
Claim 7
Dependent Claim
25 words
A process according to claim 3 wherein the powder is selected from the group consisting of silver, platinum, palladium, aluminum, titanium and an alloy thereof.
Claim 8
Dependent Claim
23 words
A process according to claim 3 wherein the powder is selected from the group consisting of polyacrylate, polymethacrylate, polycarbonate, polysulfone and isotactic polypropylene.
Claim 9
Dependent Claim
23 words
A process according to claim 4 wherein the powder is selected from the group consisting of polyacrylate, polymethacrylate, polycarbonate, polysulfone and isotactic polypropylene.
References Cited (Backward Citations)
US3279067A
Cited
US4064629A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-08 | 1990-03-10 | 1990-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-08 | 1994-03-10 | 1994-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-08 | 1998-03-10 | 1998-09-09 | $7700.00 | Window Closed / Lapsed |