Patent US3417838A successfully refreshed from Google Patents.
US3417838A
Expired / Lapsed
US
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Funnel of flexible stethoscope for mediate auscultation
Assignee: Individual
•
Filing: 1966-12-14
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Granted: 1968-12-24
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Expires: 1986-12-14
Abstract
No abstract record available.
Inventors
- 👤 Shlyakhter Isaak Abramovich
- 👤 Krupin Boris Nikolaevich
- 👤 Gismatullin Ravil Ibragimovich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:24
CPC Classifications
A; A61; A61B; A61B7/00; A61B7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR1164669A
Cited
FR1208208A
Cited
US910854A
Cited
US1853951A
Cited
US3276536A
Cited
US677172A
Cited
US2445917A
Cited
US3339667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |