Patent US4556389A successfully refreshed from Google Patents.
US4556389A
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Method and compositions for bonding metals and ceramics with which to make prosthetic teeth
Assignee: FOUR BRAIN Co Ltd A CORP OF JAPAN
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Filing: 1981-12-31
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Granted: 1985-12-03
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Expires: 2001-12-31
Abstract
Abstract A novel method for firmly bonding metal and ceramics comprising the steps of applying a composite plating composition consisting of a metal containing plating solution and fine particles of ceramic on a surface of metal to which the ceramic is to be bonded, thereby forming a metal plating layer on the surface having partially projected fine particles of ceramic, and then firing the coated metal in order to fuse the ceramic thereto.
Inventors
- 👤 Masato Ueno
- 👤 Masayoshi Sato
- 👤 Mitsuyuki Tasaka
- 👤 Tatsuro Naito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:02
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/0003; A61C5/00; A61C5/70; A61C5/77; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/252
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
102 words
A method of firmly bonding an opaque porcelain to a metal crown for prosthetic teeth comprising the steps of: plating the metal crown with a plating solution containing metal ions and fine ceramic particles dispersed therein to form a composite layer on the metal crown, said composite layer comprising a metal layer on the surface of the metal crown having plurality of fine ceramic particles embedded in the metal layer and partially projecting above the metal layer; applying the opaque porcelain to the composite layer; and firing the porcelain to fuse it to the composite layer and thereby to the metal crown.
Claim 2
Independent Claim
102 words
A method of firmly bonding an opaque porcelain to a metal crown for prosthetic teeth comprising the steps of: plating the metal crown with a plating solution containing metal ions and fine ceramic particles dispersed therein to form a composite layer on the metal crown, said composite layer comprising a metal layer on the surface of the metal crown having plurality of fine ceramic particles embedded in the metal layer and partially projecting above the metal layer; applying the opaque porcelain to the composite layer; and firing the porcelain to fuse it to the composite layer and thereby to the metal crown.
Claim 3
Dependent Claim
24 words
A method according to claim 1, wherein the thermal expansion factor of the fine ceramic particles approximates that of the second opaque porcelain layer.
Claim 4
Dependent Claim
20 words
A method according to claim 1, wherein the metal crown for the prosthetic teeth is made of a nickel-chromium alloy.
Claim 5
Dependent Claim
18 words
A method according to claim 1, wherein the metal crown for the prosthetic teeth has means for fitting.
Claim 6
Dependent Claim
51 words
A prothetic tooth produced according to the method of claim 1, the tooth consisting of a metal crown, a metal plating layer having a plurality of fine ceramic particles embedded therein and partially projecting therefrom formed on the metal crown, and an opaque porcelain layer bonded to the metal plating layer.
Claim 7
Dependent Claim
48 words
A prosthetic tooth produced according to the method of claim 2, the tooth consisting of a metal plating layer having a plurality of fine ceramic particles embedded therein and partially projecting therefrom formed on the metal crown, and an opaque porcelain layer bonded to the metal plating layer.
Claim 8
Dependent Claim
48 words
A prosthetic tooth produced according to the method fo claim 3, the tooth consisting of a metal plating layer having a plurality of fine ceramic particles embedded therein and partially projecting therefrom formed on the metal crown, and an opaque porcelain layer bonded to the metal plating layer.
Claim 9
Dependent Claim
48 words
A prosthetic tooth produced according to the method of claim 4, the tooth consisting of a metal plating layer having a plurality of fine ceramic particles embedded therein and partially projecting therefrom formed on the metal crown, and an opaque porcelain layer bonded to the metal plating layer.
Claim 10
Dependent Claim
41 words
A prosthetic tooth consisting of a metal crown, a metal plating layer having a plurality of fine ceramic particles embedded therein and partially projecting therefrom formed on the metal crown and an opaque porcelain layer bonded to the metal plating layer.
Claim 11
Dependent Claim
41 words
A prosthetic tooth consisting of a metal crown, a metal plating layer having a plurality of fine ceramic particles embedded therein and partially projecting therefrom formed on the metal crown and an opaque porcelain layer bonded to the metal plating layer.
References Cited (Backward Citations)
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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) | 1988-12-02 | 1989-06-03 | 1989-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-02 | 1993-06-03 | 1993-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-02 | 1997-06-03 | 1997-12-03 | $7700.00 | Window Closed / Lapsed |