Patent US5868744A successfully refreshed from Google Patents.
US5868744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrosurgical instrument for therapeutic treatment of varices
Assignee: Individual
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Filing: 1995-04-28
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Granted: 1999-02-09
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Expires: 2015-04-28
Abstract
Abstract An electrosurgical instrument is useful for therapeutic treatment of varices, especially small varicose dilatations of the cutaneous veins. A surgical instrument is provided for rapid, reliable and minimally discomforting therapy of small varicose dilatations of the cutaneous veins and similar disorders, ensuring the lowest possible rate of recidivism while minimizing side effects. The instrument has two fork-shaped protruding needle electrodes which connect to different poles of an electrical power source and which are each partially enclosed in an electrical insulating layer. The forward tip region of the needle electrodes is left open.
Inventors
- 👤 Hans-Rainer Willmen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:09
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1402; A61B18/1477; A61B17/00; A61B2017/00973; A61B2018/1405; A61B2018/1425; A61B2018/143
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
98 words
Electrosurgical instrument for the therapy of varices, comprising two fork-shaped protruding needle electrodes (6, 7), which are connectable to different poles of an electrical current source and which each are partly coated by a thin electrical insulation layer, said insulation layer leaving a forward tip zone (6a, 7a) of the needle electrodes (6, 7) free, whereby the transition from the tip zone to an insulated zone is substantially stepless; and the needle electrodes (6, 7) are axially supported at a rearward end in insulating sleeves (4, 5) having a larger cross section than the needle electrodes (6, 7).
Claim 2
Dependent Claim
98 words
Electrosurgical instrument for the therapy of varices, comprising two fork-shaped protruding needle electrodes (6, 7), which are connectable to different poles of an electrical current source and which each are partly coated by a thin electrical insulation layer, said insulation layer leaving a forward tip zone (6a, 7a) of the needle electrodes (6, 7) free, whereby the transition from the tip zone to an insulated zone is substantially stepless; and the needle electrodes (6, 7) are axially supported at a rearward end in insulating sleeves (4, 5) having a larger cross section than the needle electrodes (6, 7).
Claim 3
Dependent Claim
75 words
Instrument according to claim 1, further comprising an electrode head and a grip piece, wherein the insulating sleeves (4, 5) form legs of the approximately trouser-shaped electrode head (2), on which the needle electrodes (6, 7) are mounted; said electrode head having a leg side and said needle electrodes are mounted on the leg side directed in a forward direction, and said electrode head rearwardly is connected with said grip piece (3) which is pen-shaped.
Claim 4
Dependent Claim
33 words
Instrument according to claim 2, wherein the electrode head (2) and the grip piece (3) have corresponding electrical and mechanical connection elements (10, 10a, 10b), the latter being detachably connected with each other.
Claim 5
Dependent Claim
44 words
Instrument according to claim 2, further comprising supply lines (8) for the needle electrodes and wherein an electrical manual switch (9) is located in the grip piece (3), said manual switch being integrated in the supply lines (8) of the needle electrodes (6, 7).
Claim 6
Dependent Claim
25 words
Instrument according to claim 1, further comprising supply lines (8) of the needle electrodes (6, 7), and a footswitch located in said supply lines (8).
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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) | 2002-02-08 | 2002-08-10 | 2003-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-02-08 | 2006-08-10 | 2007-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-02-08 | 2010-08-10 | 2011-02-09 | $7700.00 | Window Closed / Lapsed |