US3766650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semi-finished porcelain teeth
Assignee: CAPA IDUSTRIES Inc A DE CORP
•
Filing: 1971-10-12
•
Granted: 1973-10-23
•
Expires: 1991-10-12
Abstract
Abstract A semi-finished artificial tooth adapted for shaping and mounting in a dental appliance. At least some of the surface areas on the tooth are provided with a rough finish either by etching or by firing the unvitrified tooth to a point below the vitrification temperature of the porcelain wherein the porcelain particles are fused together to form a concretious body. When the tooth is shaped by adding porcelain and is subsequently fired to the vitrification temperature and maintained at this temperature until a glossy smooth surface is obtained, the tooth is vitrified into a monolithic structure.
Inventors
- 👤 R Gnecco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:41
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/08; A61C13/083
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
39 words
A semi-finished artificial tooth adapted for shaping by the addition of porcelain material and for subsequent mounting in a dental appliance, as set forth in claim 1, wherein the porcelain on said rough finished surface areas is chemically etched.
Claim 2
Dependent Claim
39 words
A semi-finished artificial tooth adapted for shaping by the addition of porcelain material and for subsequent mounting in a dental appliance, as set forth in claim 1, wherein the porcelain on said rough finished surface areas is mechanically etched.
Claim 3
Dependent Claim
50 words
A semi-finished artificial tooth adapted for shaping by the addition of porcelain material and for subsequent mounting in a dental appliance, as set forth in claim 1, wherein said porcelain body has been fired at a temperature above 1,200*F. and below the vitrification temperature of the porcelain in said body.
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |