US3304608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for taking impressions of teeth
Assignee: Frohnecke KG
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Filing: 1964-03-24
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Granted: 1967-02-21
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Expires: 1984-03-24
Abstract
No abstract record available.
Inventors
- 👤 Frohnecke Hans Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:35
CPC Classifications
A; A61; A61C; A61C13/00; A61C5/00; A61C5/70; A61C5/77; A61C9/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
79 words
A DEVICE FOR TAKING IMPRESSIONS OF TEETH, WHICH COMPRISES, IN COMBINATION, A RING HAVING A PLURALITY OF PERFORATIONS AT ONE END; A THIN-WALLED HOLLOW CYLINDER, INSERTED IN SAID RING, OF A DIAMETER TIGHTLY FITTING SAID RING AND OF SHORTER LENGTH THAN THE SAME; A COVER PLATE CLOSING ONE END OF SAID CYLINDER AND OF LARGER DIAMETER THAN THE LATTER, THUS FORMING A FLANGE STOPPING ENTRY OF SAID CYLINDER IN SAID RING AT A PREDETERMINED LENGTH; BOTH SAID RING AND
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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |