US4050156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental appliance
Assignee: Individual
•
Filing: 1976-06-28
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Granted: 1977-09-27
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Expires: 1996-06-28
Abstract
Abstract Dental appliances such as orthodontic apparatus in the form of a coated metal having characteristics including aesthetic appearance highlighted by tooth coloring, resistance to abrasion, low friction, weldability, stability at high temperatures and attachability to dental adhesives. A base metallic material is covered by a coating including a para-oxybenzoyl homopolyester and polytetrafluoroethylene and a pigment for providing the tooth coloring.
Inventors
- 👤 Daniel Chasanoff
- 👤 Myles Z. Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:56
CPC Classifications
A; A61; A61C; A61C7/00; A61C7/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
39 words
A dental appliance, for use in the mouth as an improvement over polymeric fluorocarbon appliances, comprising a metallic base material and a coating including a para-oxybenzoyl homopolyester, a polymeric fluorocarbon and a pigment for providing a tooth colored appearance.
Claim 2
Dependent Claim
39 words
A dental appliance, for use in the mouth as an improvement over polymeric fluorocarbon appliances, comprising a metallic base material and a coating including a para-oxybenzoyl homopolyester, a polymeric fluorocarbon and a pigment for providing a tooth colored appearance.
Claim 3
Dependent Claim
24 words
The invention according to claim 1 wherein said appliance is an orthodontic appliance and said coating is attachable to an adhesive without attack therefrom.
Claim 4
Dependent Claim
12 words
The invention according to claim 1 wherein said polymeric fluorocarbon is polytetrafluoroethylene.
Claim 5
Dependent Claim
27 words
The invention according to claim 3 wherein said coating including said materials in proportions by volume of 20% - 55% para-oxybenzoyl homopolyester and 80% - 45% polytetrafluoroethylene.
Claim 6
Dependent Claim
23 words
The invention according to claim 3 wherein said coating includes said materials in proportions by volume of 45% para-oxybenzoyl homopolyester and 55% polytetrafluoroethylene.
Claim 7
Dependent Claim
13 words
The invention according to claim 3 wherein said pigment to TiO 2 .
References Cited (Backward Citations)
US3303565A
Cited
US3504438A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |