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US4059901A
Expired / Lapsed
US
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Porcelain fused to metal denture tooth retainer
Assignee: Individual
•
Filing: 1975-08-20
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Granted: 1977-11-29
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Expires: 1995-08-20
Abstract
Abstract A porcelain denture tooth for attachment to the denture plastic base, mounted to the gums, made with a unitary thinwalled metal embedded support, U-shaped in cross-section, embedded in the denture tooth body, with portions of the U-shaped metal retainer extending outside the tooth body to form ahead portion for attachment to the denture base.
Inventors
- 👤 Robert Spalten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:17
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/10; A61C13/1003; A61C13/1006
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
124 words
A denture tooth for attachment to a denture appliance having a molded denture base conforming to the gum areas of the mouth, said denture tooth comprising a body and an extending metal retainer made of a single piece of metal terminating in a head portion for attachment to the denture base, said metal retainer having embedded in said body, a metal retention portion, U-shaped in cross-section, extending longitudinally towards the biting edge of the tooth for the major portion of the tooth length, providing a large engaging surface to increase its retention and reinforcing characteristics with the tooth body, the anterior and posterior portions of the U-shaped cross-section extending from the tooth body to form the head portion for attachment to the denture base.
Claim 2
Dependent Claim
124 words
A denture tooth for attachment to a denture appliance having a molded denture base conforming to the gum areas of the mouth, said denture tooth comprising a body and an extending metal retainer made of a single piece of metal terminating in a head portion for attachment to the denture base, said metal retainer having embedded in said body, a metal retention portion, U-shaped in cross-section, extending longitudinally towards the biting edge of the tooth for the major portion of the tooth length, providing a large engaging surface to increase its retention and reinforcing characteristics with the tooth body, the anterior and posterior portions of the U-shaped cross-section extending from the tooth body to form the head portion for attachment to the denture base.
Claim 3
Dependent Claim
15 words
The denture tooth of claim 1 wherein the embedded portion of the retainer is hollow.
Claim 4
Dependent Claim
15 words
The denture tooth of claim 1 wherein the head portion comprises a peripherally extending flange.
Claim 5
Dependent Claim
12 words
The denture tooth of claim 1 wherein the embedded portion is perforated.
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) | 1980-11-28 | 1981-05-30 | 1981-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-28 | 1985-05-30 | 1985-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-28 | 1989-05-30 | 1989-11-29 | $7700.00 | Window Closed / Lapsed |