Patent US3217706A successfully refreshed from Google Patents.
US3217706A
Expired / Lapsed
US
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Impedance oculograph
Assignee: Spacelabs Medical Inc
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Filing: 1962-10-02
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Granted: 1965-11-16
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Expires: 1982-10-02
Abstract
No abstract record available.
Inventors
- 👤 George H Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:39
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/24; A61B5/25; A61B5/279; A61B5/297; A61B5/316; A61B5/398
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
AN IMPEDANCE OCULOGRAPH COMPRISING: A PAIR OF ELECTRODES ADAPTED TO BE SPACED APART ABOUT THE PERIPHERY OF THE ORBIT, MEANS FOR SUPPLYING AN ALTERNATING CURRENT CARRIER FREQUENCY OF FIXED AMPLITUDE TO SAID ELECTRODES, DETECTOR MEANS AMPLITUDE TO SAID ELECTRODES, OF SAID CARRIER FREQUENCY CAUSED BY CHANGES IN IMPEDANCE BETWEEN SAID ELECTRODES, AND INDICATOR MEANS CONNECTED TO SAID DETECTOR MEANS FOR DISPLAYING THE MAGNITUDE OF SAID IMPEDANCE CHANGE.
Claim 2
Dependent Claim
67 words
AN IMPEDANCE OCULOGRAPH COMPRISING: A PAIR OF ELECTRODES ADAPTED TO BE SPACED APART ABOUT THE PERIPHERY OF THE ORBIT, MEANS FOR SUPPLYING AN ALTERNATING CURRENT CARRIER FREQUENCY OF FIXED AMPLITUDE TO SAID ELECTRODES, DETECTOR MEANS AMPLITUDE TO SAID ELECTRODES, OF SAID CARRIER FREQUENCY CAUSED BY CHANGES IN IMPEDANCE BETWEEN SAID ELECTRODES, AND INDICATOR MEANS CONNECTED TO SAID DETECTOR MEANS FOR DISPLAYING THE MAGNITUDE OF SAID IMPEDANCE CHANGE.
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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |