Patent US3168160A successfully refreshed from Google Patents.
US3168160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stethoscope
Assignee: Cardiosonics Medical Instruments Corp
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Filing: 1962-06-12
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Granted: 1965-02-02
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Expires: 1982-06-12
Abstract
No abstract record available.
Inventors
- 👤 Littmann David
- 👤 John M Goodnow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:41
CPC Classifications
A; A61; A61B; A61B7/00; A61B7/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
IN A STETHOSCOPE CONSTRUCTION HAVING A PAIR OF RIGID ELONGATED EAR TUBES AND A FLEXIBLE Y-TUBE WITH INTEGRAL ARMS AND A STEM, A PAIR OF ELONGATED LEAF SPRINGS POSITIONED WITHIN SAID Y-TUBE ARMS AND PRETRESSED TO FORM U-SHAPED ARC, AND MEANS INTERENGAGING EACH OF SAID LEAF SPRINGS AT THEIR ENDS TO SAID EAR TUBES WITH ONE SPRING LONGITUDINALLY SLIDABLE WITH RESPECT TO THE OTHER, SAID MEANS INTERENGAGING SAID LEAF SPRINGS AT EACH END TO SAID EAR TUBES INCLUDING MEANS ENCLOSING PORTIONS OF SAID LEAF SPRING ENDS AND SAID ENDS OF SAID TUBES, SAID MEANS IN-
Claim 2
Dependent Claim
95 words
IN A STETHOSCOPE CONSTRUCTION HAVING A PAIR OF RIGID ELONGATED EAR TUBES AND A FLEXIBLE Y-TUBE WITH INTEGRAL ARMS AND A STEM, A PAIR OF ELONGATED LEAF SPRINGS POSITIONED WITHIN SAID Y-TUBE ARMS AND PRETRESSED TO FORM U-SHAPED ARC, AND MEANS INTERENGAGING EACH OF SAID LEAF SPRINGS AT THEIR ENDS TO SAID EAR TUBES WITH ONE SPRING LONGITUDINALLY SLIDABLE WITH RESPECT TO THE OTHER, SAID MEANS INTERENGAGING SAID LEAF SPRINGS AT EACH END TO SAID EAR TUBES INCLUDING MEANS ENCLOSING PORTIONS OF SAID LEAF SPRING ENDS AND SAID ENDS OF SAID TUBES, SAID MEANS IN-
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) | 1968-02-02 | 1968-08-03 | 1969-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-02 | 1972-08-03 | 1973-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-02 | 1976-08-03 | 1977-02-02 | $7700.00 | Window Closed / Lapsed |