US3128759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tooth vitality determining device
Assignee: SS White Dental Manufacturing Co
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Filing: 1961-03-10
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Granted: 1964-04-14
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Expires: 1981-03-10
Abstract
No abstract record available.
Inventors
- 👤 Richard P Bellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:16
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/05; A61B5/053; A61B5/0534
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A TOOTH VITALITY DETERMINING DEVICE COMPRISING A SOURCE OF ELECTRICAL ENERGY, A RETURN ELECTRODE FOR CONTACT WITH THE PATIENT, AN INSULATING ELECTRODE HOLDER HAVING AN ELECTRODE ADAPTED TO BE APPLIED TO THE TOOTH BEING TESTED, A VOLTAGE DIVIDING DEVICE CONNECTED TO SAID SOURCE AND INCLUDING A VOLTAGE SELECTING ELEMENT CONNECTED TO SAID RETURN ELECTRODE WITH THE OTHER ELECTRODE HAVING A RETURN CONNECTION TO THE SOURCE, A CURRENT-MEASURING DEVICE CONNECTED IN SERIES BETWEEN SAID RETURN ELECTRODE AND THE SOURCE AND EFFECTIVE FOR INDICATING THE CURRENT FLOWING BETWEEN THE ELECTRODES AT THE PREVAILING POSITION OF THE VOLTAGE SELECTING ELEMENT, ELECTROMOTIVE MEANS TO MOVE SAID VOLTAGE SELECTING ELEMENT FOR INCREASING OR DECREASING THE VOLTAGE APPLIED AT THE ELECTRODES, AND ELECTRIC CIRCUIT MEANS INCLUDING SWITCHES FOR SELECTIVELY ENERGIZING SAID ELECTROMOTIVE MEANS.
Claim 2
Dependent Claim
127 words
A TOOTH VITALITY DETERMINING DEVICE COMPRISING A SOURCE OF ELECTRICAL ENERGY, A RETURN ELECTRODE FOR CONTACT WITH THE PATIENT, AN INSULATING ELECTRODE HOLDER HAVING AN ELECTRODE ADAPTED TO BE APPLIED TO THE TOOTH BEING TESTED, A VOLTAGE DIVIDING DEVICE CONNECTED TO SAID SOURCE AND INCLUDING A VOLTAGE SELECTING ELEMENT CONNECTED TO SAID RETURN ELECTRODE WITH THE OTHER ELECTRODE HAVING A RETURN CONNECTION TO THE SOURCE, A CURRENT-MEASURING DEVICE CONNECTED IN SERIES BETWEEN SAID RETURN ELECTRODE AND THE SOURCE AND EFFECTIVE FOR INDICATING THE CURRENT FLOWING BETWEEN THE ELECTRODES AT THE PREVAILING POSITION OF THE VOLTAGE SELECTING ELEMENT, ELECTROMOTIVE MEANS TO MOVE SAID VOLTAGE SELECTING ELEMENT FOR INCREASING OR DECREASING THE VOLTAGE APPLIED AT THE ELECTRODES, AND ELECTRIC CIRCUIT MEANS INCLUDING SWITCHES FOR SELECTIVELY ENERGIZING SAID ELECTROMOTIVE MEANS.
References Cited (Backward Citations)
US2522052A
Cited
US2949107A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |