US3564582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Obturo-muco-retractor
Assignee: RICHENEL J TJONG JOE WAI
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Filing: 1969-08-11
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Granted: 1971-02-16
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Expires: 1989-08-11
Abstract
Abstract AN INSTRUMENT FOR PROTOLOGICAL OPERATIONS COMPRISING A CYLINDER WITH TAPERED TIP AND CONCAVE BASE SECURED TO A HANDLED SHAFT DISPOSED AXIALLY THROUGH THE BASE, A CONCAVE CLOSURE MEMBER SLIDABLY MOUNTD ON THE SHAFT WITH ITS CONCAVITY FACING THE CYLINDER CAVITY, A WING NUT THREADED ON THE SHAFT BETWEEN THE CLOSURE MEMBER AND THE HANDLE, AND A COIL SPRING DISPOSED AROUND THE SHAFT BETWEEN THE WING NUT AND THE CLOSURE MEMBER, WITH THE LATTER ADAPTED TO BE URGED AGAINST THE CYLINDER BY ROTATION OF THE WING NUT.
Inventors
- 👤 Richenel J Tjong-Joe-Wai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:59
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/320016; A61B10/00; A61B10/02; A61B10/04; A61B17/3205; A61B17/3207; A61B17/32075
Claims Analysis
Total Claims: 0
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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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |