US5284442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tooth caps and artificial teeth and the method of forming same
Assignee: PETERSON KENNETH N
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Filing: 1992-05-20
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Granted: 1994-02-08
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Expires: 2012-05-20
Abstract
Abstract Caps for teeth and artificial teeth such as used in bridges, and the like, formed by a method comprising a combination of steps in joining various materials to make the article, wherein the principal difference in the steps as compared to customary techniques is the elimination of a sandblasting operation on a metal base and utilization of a special adhesive to join the other materials to the metal base.
Inventors
- 👤 Ken N. Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:42
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/0003; A61C13/225; A61C13/26; A61C5/00; A61C5/70; A61C5/77
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
90 words
The method of forming an artificial tooth or crown for a tooth utilizing a metal coping as a base wherein, after being formed, the metal coping is heated to a temperature of approximately 1975 degrees fahrenheit; the coping is then cooled; a metal surface sealer is applied to the cooled coping; the coping with the metal sealer thereon is then heated to approximately 1925 degrees fahrenheit under vacuum and held at this temperature for two and one half minutes; the metal coping with its sealing agent is allowed to cool.
Claim 2
Independent Claim
90 words
The method of forming an artificial tooth or crown for a tooth utilizing a metal coping as a base wherein, after being formed, the metal coping is heated to a temperature of approximately 1975 degrees fahrenheit; the coping is then cooled; a metal surface sealer is applied to the cooled coping; the coping with the metal sealer thereon is then heated to approximately 1925 degrees fahrenheit under vacuum and held at this temperature for two and one half minutes; the metal coping with its sealing agent is allowed to cool.
Claim 3
Dependent Claim
41 words
The method of claim 1 wherein after cooling of the metal coping and sealed, the metal coping with sealer is then coated with an opaque porcelain material, and further coatings and heatings thereof are applied and performed in a customary manner.
Claim 4
Dependent Claim
14 words
The method of claim 1 wherein no sandblasting of the metal coping is used.
Claim 5
Dependent Claim
19 words
The method of claim 1 wherein no abrasive particle blasting of the metal coping is used at any stage.
References Cited (Backward Citations)
US3934348A
Cited
US4358271A
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US4426404A
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US4556389A
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US4661071A
Cited
US4806383A
Cited
US5049076A
Cited
US4980124A
Cited
US5131847A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-02-07 | 1997-08-09 | 1998-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-07 | 2001-08-09 | 2002-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-07 | 2005-08-09 | 2006-02-08 | $7700.00 | Window Closed / Lapsed |