US3605728A
Expired / Lapsed
US
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Current limiting safety electrode lead
Assignee: Lockheed Martin Corp
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Filing: 1969-06-19
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Granted: 1971-09-20
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Expires: 1989-06-19
Abstract
Abstract A SAFETY LEAD SYSTEM FOR THE TRANSMISSION OF BIOELECTRICAL SIGNALS FROM A PATIENT TO BIOMEDICAL ELECTRONIC EQUIPMENT AND FOR PATIENT GROUNDING. EACH LEAD HAS AN INTEGRAL UNPOWERED SEMICONDUCTOR CURRENT LIMITING CIRCUIT AT THE ELECTRODE WHICH PROVIDES LINEAR LOW IMPEDANCE TRANSMISSION OF THE BIOELECTRICAL SIGNAL BUT LIMITS CURRENT FLOW THROUGH THE LEAD TO A PRESET MAXIMUM LEVEL BELOW THT WHICH IS HARMFUL TO THE PATIENT, REGARDLESS OF THE POLARITY AND INTENSITY OF ACCIDENTALLY APPLIED CURRENTS AND VOLTAGES.
Inventors
- 👤 John S Ogle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:16
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/24; A61B5/25; A61B5/276; A61B5/30; A61B5/302; H; H02; H02H; H02H9/00; H02H9/02; H02H9/025; Y; Y10; Y10S; Y10S128/00; Y10S128/908; Y10S323/00; Y10S323/911
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |