US4449931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool for making separated tooth model
Assignee: Kyoto Ceramic Co Ltd
•
Filing: 1982-03-10
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Granted: 1984-05-22
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Expires: 2002-03-10
Abstract
Abstract Tool for making separated tooth model comprising a tray having a plurality of holes each made vertically in the surface thereof, and plural pins each capable of being engaged with the holes so that head portions of the pins are positioned above the surface of the tray.
Inventors
- 👤 Koji Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:22
CPC Classifications
A; A61; A61C; A61C9/00; A61C9/002
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
90 words
A tool for making separated tooth models comprising: a tray having a plurality of holes made vertically in the surface of said tray, the tray having a sunken portion in the surface thereof gradually deepening from the circumference of said tray to the central portion of the surface of said tray, and a plurality of pins, each of said pins having a leg portion and a head portion, wherein said leg portion is removably engaged with said holes and said head portion is positioned above the surface of said tray.
Claim 2
Dependent Claim
90 words
A tool for making separated tooth models comprising: a tray having a plurality of holes made vertically in the surface of said tray, the tray having a sunken portion in the surface thereof gradually deepening from the circumference of said tray to the central portion of the surface of said tray, and a plurality of pins, each of said pins having a leg portion and a head portion, wherein said leg portion is removably engaged with said holes and said head portion is positioned above the surface of said tray.
Claim 3
Dependent Claim
16 words
A tool according to claim 1, wherein the holes are arranged in at least two rows.
Claim 4
Dependent Claim
20 words
A tool according to claim 1, wherein the holes are conical and said leg portion of each pin is tapered.
Claim 5
Dependent Claim
49 words
A tool according to claim 1 wherein in use the head portion of each pin is embedded in plaster and wherein said head portion of each pin is shaped such that the pins cannot rotate or come out of the holes after the head portion is embedded in plaster.
Claim 6
Dependent Claim
20 words
A tool according to claim 1, wherein the holes and the pins are shaped such that the pins cannot rotate.
Claim 7
Dependent Claim
48 words
A tool for making separated tooth models according to claim 1 wherein the tray includes a side wall surrounding said surface and further including a frame member releasably fastened around the side wall of said tray so as to form an embankment around the surface of said tray.
Claim 8
Dependent Claim
60 words
A tool for making separated tooth models according to claim 1 further including a frame member releasably fastened around the periphery of the tray so as to form an embankment around the surface of the tray, the embankment enclosing the head portions of the pins to define a space for the introduction of a material to embed the head portions.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-22 | 1987-11-21 | 1988-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-22 | 1991-11-21 | 1992-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-22 | 1995-11-21 | 1996-05-22 | $7700.00 | Window Closed / Lapsed |