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Patent US3295208A successfully refreshed from Google Patents.
US3295208A
Expired / Lapsed
US
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Apparatus for determining the working length of root canal instruments
Assignee: Individual
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Filing: 1962-11-09
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Granted: 1967-01-03
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Expires: 1982-11-09
Abstract
No abstract record available.
Inventors
- 👤 Redtenbacher Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:45
CPC Classifications
A; A61; A61C; A61C5/00; A61C5/40; A61C5/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
APPARATUS FOR DETERMINING THE WORKING LENGTH OF THE ROOT CANAL INSTRUMENTS HAVING A LONGITUDINAL AXIS, SAID APPARATUS COMPRISING A CONTAINER CONTAINING A RETAINING SUPPORT, AT LEAST TWO ROOT CANAL INSTRUMENTS RETAINED ON SAID SUPPORT IN MUTUALLY PARALLEL POSITIONS, MARKING ELEMENTS AXIALLY ADJUSTABLY MOUNTED ON SAID INSTRUMENTS, A TRANSFERRING MEANS FOR TRANSVERSELY TRANSFERRING A WORKING LENGTH SET ON ONE OF SAID INSTRUMENTS MOUNTED IN SAID SUPPORT TO AT LEAST ONE OTHER OF SAID INSTRUMENTS MOUNTED IN SAID SUPPORT, SAID SUPPORT BEING RIGIDLY ATTACHED TO SAID CONTAINER AND SAID TRANSFER MEANS BEING SLIDABLY MOUNTED IN SAID CONTAINER, SAID TRANSFERRING MEANS COMPRISING A PLATE EXTENDING PARALLEL TO AND ADJUSTABLY SPACED FROM SAID RETAINING SUPPORT, DISPLACING MEANS FOR DISPLACING SAID PLATE IN THE CONTAINER, SAID SUPPORT HAVING MOUNTING AND ADJUSTING OPENINGS THEREIN ADAPTED TO RECEIVE SAID INSTRUMENTS IN MUTUALLY PARALLEL POSITIONS, SAID MOUNTING AND ADJUSTING OPENINGS BEING ADAPTED TO RECEIVE ONE OF SAID ROOT CANAL INSTRUMENTS EACH AND BEING SMALLER IN AT LEAST ONE DIMENSION OF THEIR CROSS-SECTION THAN THE CORRESPONDING DIMENSION OF SAID MARKING ELEMENTS.
Claim 2
Dependent Claim
172 words
APPARATUS FOR DETERMINING THE WORKING LENGTH OF THE ROOT CANAL INSTRUMENTS HAVING A LONGITUDINAL AXIS, SAID APPARATUS COMPRISING A CONTAINER CONTAINING A RETAINING SUPPORT, AT LEAST TWO ROOT CANAL INSTRUMENTS RETAINED ON SAID SUPPORT IN MUTUALLY PARALLEL POSITIONS, MARKING ELEMENTS AXIALLY ADJUSTABLY MOUNTED ON SAID INSTRUMENTS, A TRANSFERRING MEANS FOR TRANSVERSELY TRANSFERRING A WORKING LENGTH SET ON ONE OF SAID INSTRUMENTS MOUNTED IN SAID SUPPORT TO AT LEAST ONE OTHER OF SAID INSTRUMENTS MOUNTED IN SAID SUPPORT, SAID SUPPORT BEING RIGIDLY ATTACHED TO SAID CONTAINER AND SAID TRANSFER MEANS BEING SLIDABLY MOUNTED IN SAID CONTAINER, SAID TRANSFERRING MEANS COMPRISING A PLATE EXTENDING PARALLEL TO AND ADJUSTABLY SPACED FROM SAID RETAINING SUPPORT, DISPLACING MEANS FOR DISPLACING SAID PLATE IN THE CONTAINER, SAID SUPPORT HAVING MOUNTING AND ADJUSTING OPENINGS THEREIN ADAPTED TO RECEIVE SAID INSTRUMENTS IN MUTUALLY PARALLEL POSITIONS, SAID MOUNTING AND ADJUSTING OPENINGS BEING ADAPTED TO RECEIVE ONE OF SAID ROOT CANAL INSTRUMENTS EACH AND BEING SMALLER IN AT LEAST ONE DIMENSION OF THEIR CROSS-SECTION THAN THE CORRESPONDING DIMENSION OF SAID MARKING ELEMENTS.
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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |