US2528219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making thermoplastic articles
Assignee: AUSTENAL LAB Inc
•
Filing: 1947-03-11
•
Granted: 1950-10-31
•
Expires: 1967-03-11
Abstract
No abstract record available.
Inventors
- 👤 Roy C Feagin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:17
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/08; A61C13/081; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
THE METHOD OF MAKING ARTIFICAL TEETH FREE OF PARTING LINES, WHICH COMPRISES FORMING A RELATIVELY RIGID UNITARY MOLD BODY HAVING FORMED THEREIN A MOLD CAVITY OF THE SIZE AND SHAPE OF THE DESIRED TOOTH AND FREE OF PARTING LINES, FILLING SAID MOLD CAVITY WITH THERMOPLASTIC MATERIAL COMPRISING A POLYMERIZABLE INGREDIENT TO FORM THE BODY OF THE TOOTH, HEATING THE THERMOPLASTIC TOOTH BODY WHILE IN THE MOLD CAVITY TO A TEMPERATURE AND FOR A PERIOD OF TIME SUFFICIENT COMPLETELY TO POLYMERIZE THE SAME TO THE FORM OF THE TOOTH, ALLOWING THE TOOTH TO COOL BELOW THE POLYMERIZATION TEMPERATURE WHILE IN THE MOLD BODY, AND DESTROYING THE MOLD BODY TO REMOVE THE TOOH THEREFROM FREE OF PARTING LINES.
Claim 2
Independent Claim
116 words
THE METHOD OF MAKING ARTIFICAL TEETH FREE OF PARTING LINES, WHICH COMPRISES FORMING A RELATIVELY RIGID UNITARY MOLD BODY HAVING FORMED THEREIN A MOLD CAVITY OF THE SIZE AND SHAPE OF THE DESIRED TOOTH AND FREE OF PARTING LINES, FILLING SAID MOLD CAVITY WITH THERMOPLASTIC MATERIAL COMPRISING A POLYMERIZABLE INGREDIENT TO FORM THE BODY OF THE TOOTH, HEATING THE THERMOPLASTIC TOOTH BODY WHILE IN THE MOLD CAVITY TO A TEMPERATURE AND FOR A PERIOD OF TIME SUFFICIENT COMPLETELY TO POLYMERIZE THE SAME TO THE FORM OF THE TOOTH, ALLOWING THE TOOTH TO COOL BELOW THE POLYMERIZATION TEMPERATURE WHILE IN THE MOLD BODY, AND DESTROYING THE MOLD BODY TO REMOVE THE TOOH THEREFROM FREE OF PARTING LINES.
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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) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |