US3786565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing false teeth
Assignee: RECH POUR APPLIC CERAMIQUE SER
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Filing: 1972-03-06
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Granted: 1974-01-22
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Expires: 1992-03-06
Abstract
Abstract A process for manufacturing false teeth constituted of a metallic frame made of non-precious metal, for example, chromiumnickel or cobalt-chromium, this frame being coated with various layers of dental porcelain having a medium melting-point, this process being note-worthy for there is laid down on the frame which is in the form of a cap, fine particles of metallic brazing of cobalt-chromium so as to form on the outer face of the frame, positive retentions, then, a physico-chemical binder, burnt under vacuum, is applied on the said frame, afterwards, porcelain layers are laid down and burnt as usual.
Inventors
- 👤 M Jarrault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:39
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/08; A61C13/083; A61C13/0835; A61K; A61K6/00; A61K6/20; A61K6/80; A61K6/802; A61K6/84
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
24 words
A process according to claim 1, wherein said particles of brazing are layed down by means of a blow lamp having a low voltage.
Claim 2
Dependent Claim
12 words
A process according to claim 1, wherein said brazing particles are cobalt-chromium.
Claim 3
Dependent Claim
15 words
A process according to claim 1, wherein the frame is heated before applying binder thereon.
Claim 4
Dependent Claim
18 words
A process according to claim 1, wherein the binder is burnt at a temperature close to 1020* C.
Claim 5
Dependent Claim
19 words
A process according to claim 1, wherein the burning of the binder is carried out under a high-efficiency vacuum.
Claim 6
Dependent Claim
21 words
A process according to claim 1, wherein the binder is essentially constituted of a high-grade of potassium, sodium, silica and calcium.
Claim 7
Dependent Claim
13 words
A false tooth obtained by working out the process according to claim 1.
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |