Patent US3295631A successfully refreshed from Google Patents.
US3295631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machlup stethoscope
Assignee: —
•
Filing: —
•
Granted: 1967-01-03
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Expires: 1984-01-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:20
CPC Classifications
A; A61; A61B; A61B7/00; A61B7/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
AN ADJUSTABLE BINAURAL STETHOSCOPE CONSTRUCTION COMPRISING, A PAIR OF ELONGATED, HOLLOW, RIGID EAR TUBES EACH HAVING AN UPPER END AND A LOWER END, A CURVED SPRING DEFINING A FIRST END CONNECTED TO ONE OF SAID EAR TUBE ENDS AND A SECOND END CONNECTED TO THE OTHER SAID EAR TUBE END BY FIRST AND SECOND CONNECTIONS, SAID CONNECTIONS EACH COMPRISING MEANS FOR PREVENTING LONGITUDINAL MOVEMENT OF SAID EAR TUBES AND ALLOWING ROTATIONAL MOVEMENT THEREOF AND MEANS FOR ROTATIONAL INDEXING THEREOF ABOUT AXES OF SAID EAR TUBES, SAID MEANS FOR ROTATIONAL INDEXING COMPRISING A SPRING BIASED PROJECTION ON ONE OF SAID EAR TUBES OR SPRING AND A PLURALITY OF INDEXING INDENTATIONS ON THE OTHER OF SAID EAR TUBES OR SPRING.
Claim 2
Dependent Claim
118 words
AN ADJUSTABLE BINAURAL STETHOSCOPE CONSTRUCTION COMPRISING, A PAIR OF ELONGATED, HOLLOW, RIGID EAR TUBES EACH HAVING AN UPPER END AND A LOWER END, A CURVED SPRING DEFINING A FIRST END CONNECTED TO ONE OF SAID EAR TUBE ENDS AND A SECOND END CONNECTED TO THE OTHER SAID EAR TUBE END BY FIRST AND SECOND CONNECTIONS, SAID CONNECTIONS EACH COMPRISING MEANS FOR PREVENTING LONGITUDINAL MOVEMENT OF SAID EAR TUBES AND ALLOWING ROTATIONAL MOVEMENT THEREOF AND MEANS FOR ROTATIONAL INDEXING THEREOF ABOUT AXES OF SAID EAR TUBES, SAID MEANS FOR ROTATIONAL INDEXING COMPRISING A SPRING BIASED PROJECTION ON ONE OF SAID EAR TUBES OR SPRING AND A PLURALITY OF INDEXING INDENTATIONS ON THE OTHER OF SAID EAR TUBES OR SPRING.
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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |