US5358402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic orthodontic bracket with archwire slot liner
Assignee: Ceradyne Inc
•
Filing: 1993-10-25
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Granted: 1994-10-25
•
Expires: 2013-10-25
Abstract
Abstract An orthodontic bracket includes a ceramic body having an elongated channel, and a metallic archwire slot liner that is received in the channel. The liner is affixed to the ceramic body by a brazing process using a brazing material such as platinum, silver, an active metal or a mixture of molybdenum and manganese. Alternatively, the liner is formed in situ in the bracket body.
Inventors
- 👤 David P. Reed
- 👤 John S. Kelly
- 👤 James D. Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:29
CPC Classifications
A; A61; A61C; A61C7/00; A61C7/12; A61C7/14; A61C7/141
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
56 words
A ceramic orthodontic bracket comprising a ceramic body having an elongated channel, said bracket including a liner received in said channel and having an archwire slot, said liner being made of a material having a Knoop hardness that is less than the Knoop hardness of said ceramic body, said liner being brazed to said ceramic body.
Claim 2
Dependent Claim
56 words
A ceramic orthodontic bracket comprising a ceramic body having an elongated channel, said bracket including a liner received in said channel and having an archwire slot, said liner being made of a material having a Knoop hardness that is less than the Knoop hardness of said ceramic body, said liner being brazed to said ceramic body.
Claim 3
Dependent Claim
23 words
The bracket of claim 1, wherein said liner is made of a material selected from the group of stainless steel, gold and titanium.
Claim 4
Dependent Claim
15 words
The bracket of claim 1, wherein said liner is made of a thin metallic foil.
Claim 5
Dependent Claim
11 words
The bracket of claim 3, wherein said foil comprises stainless steel.
Claim 6
Dependent Claim
30 words
The bracket of claim 1, including a brazing material selected from the group consisting essentially of platinum, silver, an active metal, a mixture of molybdenum and manganese, or combinations thereof.
Claim 7
Dependent Claim
11 words
The bracket of claim 5, wherein said brazing material is titanium.
Claim 8
Independent Claim
52 words
A method of making a ceramic orthodontic bracket comprising the steps of providing a ceramic orthodontic bracket body having an elongated channel, placing in the channel a metallic archwire slot liner having a Knoop hardness less than the Knoop hardness of the ceramic body, and brazing said liner to said ceramic body.
Claim 9
Independent Claim
52 words
A method of making a ceramic orthodontic bracket comprising the steps of providing a ceramic orthodontic bracket body having an elongated channel, placing in the channel a metallic archwire slot liner having a Knoop hardness less than the Knoop hardness of the ceramic body, and brazing said liner to said ceramic body.
Claim 10
Dependent Claim
37 words
The method of claim 7, wherein said liner is brazed to said ceramic body using a brazing material selected from the group of platinum, silver, an active metal, a mixture of molybdenum and manganese or combinations thereof.
Claim 11
Dependent Claim
19 words
The method of claim 8, wherein said liner is brazed to said ceramic body using a titanium brazed material.
Claim 12
Dependent Claim
30 words
The method of claim 7, including the step of heating said ceramic body and said liner in a furnace during said step of brazing said liner to said ceramic body.
Claim 13
Dependent Claim
22 words
The method of claim 10, wherein said step of brazing said liner to said ceramic body is carried out in a vacuum.
Claim 14
Dependent Claim
23 words
The method of claim 10, wherein said step of brazing said liner to said ceramic body is carried out in an argon atmosphere.
Claim 15
Independent Claim
55 words
A method of making a ceramic orthodontic bracket comprising the steps of providing a ceramic orthodontic bracket body having an elongated channel and forming in situ an archwire slot liner in the channel, the liner being made of a material having a Knoop hardness that is less than the Knoop hardness of the ceramic body.
Claim 16
Independent Claim
55 words
A method of making a ceramic orthodontic bracket comprising the steps of providing a ceramic orthodontic bracket body having an elongated channel and forming in situ an archwire slot liner in the channel, the liner being made of a material having a Knoop hardness that is less than the Knoop hardness of the ceramic body.
Claim 17
Dependent Claim
19 words
The method of claim 13, wherein said step of forming in situ an archwire slot liner includes electroless plating.
Claim 18
Dependent Claim
20 words
The method of claim 13, wherein said step of forming in situ an archwire slot liner includes vapor phase deposition.
Claim 19
Dependent Claim
18 words
The method of claim 13, wherein said step of forming in situ an archwire slot liner includes brazing.
Claim 20
Dependent Claim
15 words
The method of claim 13, wherein the liner is made of a colloidal metal paint.
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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) | 1997-10-24 | 1998-04-25 | 1998-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-24 | 2002-04-25 | 2002-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-24 | 2006-04-25 | 2006-10-25 | $7700.00 | Window Closed / Lapsed |