Root canal file
Abstract
Abstract AN ENDODONTIC INSTRUMENT FOR TREATING A PULP CANAL, INCLUDING AN ELONGATED MEMBER HAVING A FLUTED CUTTING PORTION AT ONE END, A HANDLE AT THE OTHER AND AN INTERMEDIATE PART BETWEEN THE CUTTING PORTION AND THE HANDLE, A STOP MEMBER BEING POSITIONABLE ON THE INTERMEDIATE PORTION AT DIFFERENT LONGITUDINAL LOCATIONS AS ESTABLISHED BY LATERALLY PROJECTING RIBS TO ADJUST THE EFFECTVE LENGTH OF THE CUTTING PORTION, THE STOP MEMBER HAVING TWO ABUTMENT SURFACES, EACH OF WHICH MAY BE POSITIONED ADJACENT THE TIP OF THE CUTTING PORTION FOR VARYING THE SETTING OF THE STOP MEMBER. ALTERNATIVELY, THE INTERMEDIATE PORTION OF THE ELONGATED MEMBER MAY BE THREADED AND THE STOP MEMBER IN THE FORM OF A NUT.
Inventors
- 👤 Dennis W Saffro
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |