US3838187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental model construction method
Assignee: TECHNADENT T PROD Inc
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Filing: 1972-04-26
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Granted: 1974-09-24
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Expires: 1992-04-26
Abstract
Abstract A dental model is made by forming a keying matrix to closely fit a corrugated surface of an arch-shaped key which is then inserted into a casting of a dental model. After the casting has set to bond the model to the key, the keyed model is cut to separate various teeth of the model desired, and the parts of the model are inserted and removed from the matrix as desired for working on the model.
Inventors
- 👤 J Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:18
CPC Classifications
A; A61; A61C; A61C9/00; A61C9/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |