Patent US4722689A successfully refreshed from Google Patents.
US4722689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated temporary dental crowns
Assignee: Individual
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Filing: 1985-12-20
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Granted: 1988-02-02
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Expires: 2005-12-20
Abstract
Abstract A coated metallic dental crown and orthodontic appliances which are coated with a thin layer tooth-colored polymer which resembles the normal tooth. The appearance of temporary dental crowns and orthodontic appliances is metallic and the coated crowns and appliance blend with the teeth to give a more pleasing appearance in the mouth.
Inventors
- 👤 Jack A. Corbett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:50
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/0003
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
91 words
A dental appliance comprising a temporary dental crown for covering and protecting a portion of a human tooth which has been the subject of a dental procedure, a malleable metallic shell sized to cover the tooth portion and provide a comfortable bite to the opposing tooth and the outer surface of the crown covered with tooth-colored polymer wherein said polymer coating is selected from the group consisting of nylon, polyester vinyls, epoxy, rubber, silicone rubber and acrylic which cures at a temperature compatible with maintaining the integrity of the metallic shell.
Claim 2
Dependent Claim
91 words
A dental appliance comprising a temporary dental crown for covering and protecting a portion of a human tooth which has been the subject of a dental procedure, a malleable metallic shell sized to cover the tooth portion and provide a comfortable bite to the opposing tooth and the outer surface of the crown covered with tooth-colored polymer wherein said polymer coating is selected from the group consisting of nylon, polyester vinyls, epoxy, rubber, silicone rubber and acrylic which cures at a temperature compatible with maintaining the integrity of the metallic shell.
Claim 3
Dependent Claim
30 words
A dental appliance of claim 1 wherein said malleable metallic shell for the temporary crown is selected from the group consisting of stainless steel, aluminum, tin/silver alloy and anodized metals.
Claim 4
Dependent Claim
27 words
A dental appliance of claim 1 wherein the pigment to provide the tooth-color is selected from the group of titanium dioxide, yellow iron oxide, and mixtures thereof.
Claim 5
Dependent Claim
109 words
A dental appliance comprising a temporary dental crown for covering and protecting a portion of a human tooth which has been the subject of a dental procedure, a shell selected from aluminum, tin/silver alloy, anodized aluminum or stainless steel sized to cover the remaining portion of the tooth and provide a corresponding bite to the opposing tooth and the outer surface of said temporary crown coated with Nylon 11 about 2 mils thick which has effective amounts of titanium dioxide and yellow iron oxide to give a tooth-colored coating which coating has been applied over a primer coat of about 0.1 to about 0.2 mils epoxy phenolic system CORVEL®.
Claim 6
Dependent Claim
109 words
A dental appliance comprising a temporary dental crown for covering and protecting a portion of a human tooth which has been the subject of a dental procedure, a shell selected from aluminum, tin/silver alloy, anodized aluminum or stainless steel sized to cover the remaining portion of the tooth and provide a corresponding bite to the opposing tooth and the outer surface of said temporary crown coated with Nylon 11 about 2 mils thick which has effective amounts of titanium dioxide and yellow iron oxide to give a tooth-colored coating which coating has been applied over a primer coat of about 0.1 to about 0.2 mils epoxy phenolic system CORVEL®.
Claim 7
Dependent Claim
81 words
A dental appliance comprising a temporary crown for covering and protecting a portion of a human tooth which has been the subject of a dental procedure, a shell selected from the group consisting of aluminum, tin/silver, anodized aluminum or stainless steel sized to cover the remaining portion of the tooth and provide a corresponding bite to the opposing tooth and the outer surface of said temporary crown coated with a phenolic cured epoxy with an effective amount of titanium dioxide pigment.
Claim 8
Dependent Claim
81 words
A dental appliance comprising a temporary crown for covering and protecting a portion of a human tooth which has been the subject of a dental procedure, a shell selected from the group consisting of aluminum, tin/silver, anodized aluminum or stainless steel sized to cover the remaining portion of the tooth and provide a corresponding bite to the opposing tooth and the outer surface of said temporary crown coated with a phenolic cured epoxy with an effective amount of titanium dioxide pigment.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-01 | 1991-08-03 | 1992-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-01 | 1995-08-03 | 1996-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-01 | 1999-08-03 | 2000-02-02 | $7700.00 | Window Closed / Lapsed |