Patent US3871804A successfully refreshed from Google Patents.
US3871804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental restoration jig
Assignee: Individual
•
Filing: 1973-07-16
•
Granted: 1975-03-18
•
Expires: 1993-07-16
Abstract
Abstract A dental restoration fabricating device in which dowels are employed to locate and register teeth and teeth dies. The dowels are held in their original positions by plastic holders arranged on an adjustable fence surrounding a base which, in turn, supports an impression of the patient''s mouth. An alternate form includes an alignment pin for more accurate location of the tooth dies.
Inventors
- 👤 Abraham Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:22
CPC Classifications
A; A61; A61C; A61C9/00; A61C9/002
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
155 words
A jig for casting a model of a dental impression comprising a base, a plurality of vertically upstanding positioning pins on said base, a dental impression portion on said base within the said pins, (at least one) a plurality of table (member) members each comprising an arcuate support bar and downwardly extending hollow tubular members integral with said arcuate bar and receivable upon the positioning pins on the base, for selective placement of the tables to accommodate impressions having different sizes at least one dowel pin holder receivable upon the arcuate support, a dowel member carried by and depending from the dowel holder and extending for a portion of its length into the dental impression whereby after the dental impression, the dowel holders and the dowels have been adjusted to their proper relationship the table can be removed, the casting material poured and the table thereafter replaced in proper orientation before the casting material hardens.
Claim 2
Dependent Claim
155 words
A jig for casting a model of a dental impression comprising a base, a plurality of vertically upstanding positioning pins on said base, a dental impression portion on said base within the said pins, (at least one) a plurality of table (member) members each comprising an arcuate support bar and downwardly extending hollow tubular members integral with said arcuate bar and receivable upon the positioning pins on the base, for selective placement of the tables to accommodate impressions having different sizes at least one dowel pin holder receivable upon the arcuate support, a dowel member carried by and depending from the dowel holder and extending for a portion of its length into the dental impression whereby after the dental impression, the dowel holders and the dowels have been adjusted to their proper relationship the table can be removed, the casting material poured and the table thereafter replaced in proper orientation before the casting material hardens.
Claim 3
Dependent Claim
20 words
A jig according to claim 1 wherein each of said tables is freely slidable upon the pins and removable therefrom.
Claim 4
Dependent Claim
38 words
A jig according to claim 1 wherein each of said tables is formed with an outwardly extending tab and at least three hollow tubular members for insuring proper handling and replacement in a cast model after its removal.
Claim 5
Dependent Claim
34 words
A jig according to claim 1 wherein the dental impression is carried within a cup received within the recess of the base, said cup having apartured outwardly extending wings receivable upon the positioning pins.
Claim 6
Dependent Claim
56 words
A jig according to claim 1 in which the dowel member comprises an alignment sleeve having two, spaced longitudinal bores therein, a rigid dowel within one of said bores and a rigid alignment pin in the other bore, said dowel and pin together with the alignment sleeve being at least partially enclosed within the casting material.
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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |