US4022419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mould for making and holding working models for the manufacture of dental prostheses
Assignee: Individual
•
Filing: 1975-08-21
•
Granted: 1977-05-10
•
Expires: 1995-08-21
Abstract
Abstract A mould for making and holding a model used to make false teeth has a base part having internally ribbed outwardly inclined sidewalls and retaining means for holding a model in the base. The ribs enable the model to be repositioned exactly in the mould even if after manufacture the model has been sawn into several pieces.
Inventors
- 👤 Gerd Haker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:32
CPC Classifications
A; A61; A61C; A61C9/00; A61C9/002
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
92 words
A holder for the manufacture and receipt of a jaw impression working model for manufacturing false teeth, comprising a mould having a base, internally ribbed side walls extending from said base in a broadening manner, and a flange extending outwardly from said broadened walls at the top thereof and retaining elements contoured to the walls of the mould and removably attached to said flange, said retaining elements being provided with complementary projections at their ends to releasably hook said retaining elements together and hold the working model in position in the mould.
Claim 2
Dependent Claim
92 words
A holder for the manufacture and receipt of a jaw impression working model for manufacturing false teeth, comprising a mould having a base, internally ribbed side walls extending from said base in a broadening manner, and a flange extending outwardly from said broadened walls at the top thereof and retaining elements contoured to the walls of the mould and removably attached to said flange, said retaining elements being provided with complementary projections at their ends to releasably hook said retaining elements together and hold the working model in position in the mould.
Claim 3
Dependent Claim
31 words
The mould according to claim 1, wherein said retaining elements which correspond to the contours of the mould are each provided with a flange engaging under the flange on said mould.
Claim 4
Dependent Claim
26 words
The mould according to claim 2, wherein the projections of one of said retaining elements are claws for engaging said projections on the other retaining element.
Claim 5
Dependent Claim
32 words
The mould according to claim 1, including an upwardly extending rib provided on the inner floor of the mould at a distance from the side walls to additionally hold the working model.
Claim 6
Dependent Claim
25 words
The mould according to claim 4, wherein with the exception of the floor of the mould the space within the inner rib is constructed open.
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) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |