US4656053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing orthodontic devices and appliances
Assignee: Kulzer GmbH
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Filing: 1985-09-19
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Granted: 1987-04-07
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Expires: 2005-09-19
Abstract
Abstract A method for producing orthodontic devices and appliances having a highly accurate fit by building up a plurality of resin layers on a plaster cast comprising applying a first thin layer of a composition comprising a diurethanedimethacrylate prepared from 2,2,4-trimethylhexamethylenediisocyanate and 2-hydroxyethylmethacrylate, and a photopolymerization catalyst to the plaster cast and briefly exposing said thin layer to light whereby said thin layer is partially polymerized, successively applying at least one additional thin layer on said first thin layer and partially polymerizing each successive thin layer by brief exposure until the layer thickness and shape desired for the device or appliance are attained, and the shaped partially polymerized material is subsequently polymerized completely by exposure to light.
Inventors
- 👤 Michael Angrick
- 👤 Ullrich Trautwein
- 👤 Kurt Lenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:15
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/07; A61C; A61C13/00; A61C13/0003
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
114 words
A method for producing orthodontic devices and appliances by building up a plurality of resin layers on a plaster cast comprising applying a first thin layer of a composition comprising a diurethanedimethacrylate prepared from 2,2,4-trimethylhexamethylenediisocyanate and 2-hydroxyethylmethacrylate, and a photopolymerization catalyst to the plaster cast and briefly exposing said thin layer to light whereby said thin layer is partially polymerized, successively applying at least one additional thin layer on said first thin layer and partially polymerizing each successive thin layer by brief exposure to light until the layer thickness and shape desired for the device or appliance are attained, and exposing said shaped partially polymerized material to light to completely polymerize said shaped material.
Claim 2
Independent Claim
114 words
A method for producing orthodontic devices and appliances by building up a plurality of resin layers on a plaster cast comprising applying a first thin layer of a composition comprising a diurethanedimethacrylate prepared from 2,2,4-trimethylhexamethylenediisocyanate and 2-hydroxyethylmethacrylate, and a photopolymerization catalyst to the plaster cast and briefly exposing said thin layer to light whereby said thin layer is partially polymerized, successively applying at least one additional thin layer on said first thin layer and partially polymerizing each successive thin layer by brief exposure to light until the layer thickness and shape desired for the device or appliance are attained, and exposing said shaped partially polymerized material to light to completely polymerize said shaped material.
Claim 3
Dependent Claim
17 words
The method of claim 1, wherein said composition contains at least 40% by weight of said diurethanedimethacrylate.
Claim 4
Dependent Claim
28 words
The method of claim 2, wherein said composition also contains at least one prepolymer selected from the group consisting of acrylated polyurethane and acrylated epoxy resin, and/or bis-[4-(2-hydroxy-3-methacryloyloxypropoxy)phenyl]-dimethylmethane.
Claim 5
Dependent Claim
17 words
The method of claim 3, wherein said composition also contains at least one low-viscosity acrylate or methacrylate.
Claim 6
Dependent Claim
18 words
The method of claim 4, wherein said composition contains between 40% and 80% by weight of said diurethanedimethacrylate.
Claim 7
Dependent Claim
24 words
The method of claim 5, wherein the composition also contains, as the photopolymerization catalyst, a mixture of one or more ketones and an amine.
Claim 8
Dependent Claim
17 words
The method of claim 6, wherein said photopolymerization catalyst is a mixture of camphorquinone and an amine.
Claim 9
Dependent Claim
31 words
The method of claim 7, wherein said composition contains at least one low-viscosity acrylate or methacrylate selected from the group consisting of 2-hydroxyethylacrylate, tripropyleneglycoldiacrylate, pentaerythrittetraacrylate, butoxyethylacrylate, 2-hydroxyethylmethacrylate, butanedioldimethacrylate, triethyleneglycoldimethacrylate and dodecanediolmethacrylate.
Claim 10
Dependent Claim
45 words
The method of claim 1, wherein said composition comprises from 40% to 80% by weight of said diurethanedimethacrylate, from 0 to 50% of a prepolymer, between 5% and 30% of a low viscosity acrylate or methacrylate and from 0.5% to 10% of a photopolymerization catalyst.
Claim 11
Dependent Claim
34 words
The composition of claim 5 which contains between 2.5% and 40% of the prepolymer, between 5% and 30% of the low viscosity acrylate or methacrylate and between 1% and 5% of the photopolymerization catalyst.
Claim 12
Dependent Claim
24 words
The method of claim 10, wherein the composition also contains, as the photopolymerization catalyst, a mixture of one or more ketones and an amine.
Claim 13
Dependent Claim
17 words
The method of claim 10, wherein said photopolymerization catalyst is a mixture of camphorquinone and an amine.
Claim 14
Dependent Claim
31 words
The method of claim 12, wherein said composition contains at least one low-viscosity acrylate or methacrylate selected from the group consisting of 2-hydroxyethylacrylate, tripropyleneglycoldiacrylate, pentaerythrittetraacrylate, butoxyethylacrylate, 2-hydroxyethylmethacrylate, butanedioldimethacrylate, triethyleneglycoldimethacrylate and dodecanediolmethacrylate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-06 | 1990-10-06 | 1991-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-06 | 1994-10-06 | 1995-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-06 | 1998-10-06 | 1999-04-07 | $7700.00 | Window Closed / Lapsed |