Patent US3182129A successfully refreshed from Google Patents.
US3182129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clark etal electronic stethoscope
Assignee: —
•
Filing: —
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Granted: 1965-05-04
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Expires: 1982-05-04
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:45
CPC Classifications
A; A61; A61B; A61B7/00; A61B7/02; A61B7/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
116 words
IN AN ELECTRONIC STETHOSCOPE, A PICKUP HEAD COMPRISING: A HOUSING HAVING A FIRST AND SECOND OPEN END, AND INCLUDING MOUNTING STRUCTURE THEREIN AFFIXED TO SAID HOUSING; A PIEZOELECTRIC CRYSTAL MOUNTED TO SAID MOUNTING STRUCTURE AND ADAPTED TO BE PHYSICALLY DISTORTABLE TO PRODUCE AN OUTPUT SIGNAL THEREFROM; A DIAPHRAGM INCLUDING AN OUTER DISC OF PLASTIC CHARACTERISTICS, AN INNER DISC OF METALLIC CHARACTERISTICS IN JUXTAPOSITION WITH SAID OUTER DISC, AND A PRESSURE CENTERING ELEMENT POSITIONED BETEEEN SAID OUTER AND INNER DISCS, SAID DIAPHRAGM BEING MOUNTED TO SAID FIRST END OF SAID HOUSING AND CLOSING SAID FIRST END; AND MEANS FOR TRANSMITTING MOVEMENTS OF SAID DIAPHRAGM TO SAID CRYSTAL TO DISTORT THE SAME AND PRODUCE AN OUTPUT SIGNAL THEREFROM.
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) | 1968-05-03 | 1968-11-02 | 1969-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-03 | 1972-11-02 | 1973-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-03 | 1976-11-02 | 1977-05-04 | $7700.00 | Window Closed / Lapsed |