Patent US4821725A successfully refreshed from Google Patents.
US4821725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for treatment through hyperthermia
Assignee: CGR MEV SA
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Filing: 1986-06-06
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Granted: 1989-04-18
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Expires: 2006-06-06
Abstract
Abstract The present invention concerns a device for treatment by hyperthermia, comprising unipolar probes of the implantable type, and comprising circuitry for modifying the distribution forms of the electrical field applied to an aera to be treated.
Inventors
- 👤 Guy Azam
- 👤 Guy Convert
- 👤 Jean M. Cosset
- 👤 Jacques Dufour
- 👤 Jean P. Mabire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:20
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/40; A61N1/403; A61N1/02; A61N1/04; A61N1/06; A61N5/00; A61N5/10; A61N5/1001
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
147 words
A treatment device using hyperthermia, comprising: a first generator supplying an alternating electrical energy; two unipolar implantable probes connected to the output of said generator to receive said alternating electrical energy and to apply said electrical energy, according to an electric field, to an area of a patient to be treated; at least one second generator synchronized in frequency with said first generator; a third and fourth unipolar probe connected to receive the output of said at least one second generator and cooperating with said first two unipolar probes in order to heat said area of said patient; and means for modifying the distribution forms of said electrical field from said first and said at least one second generator including means for inverting the plus, minus polarity of said electrical energy applied to at least to said two unipolar probes which are connected to said first generator.
Claim 2
Dependent Claim
147 words
A treatment device using hyperthermia, comprising: a first generator supplying an alternating electrical energy; two unipolar implantable probes connected to the output of said generator to receive said alternating electrical energy and to apply said electrical energy, according to an electric field, to an area of a patient to be treated; at least one second generator synchronized in frequency with said first generator; a third and fourth unipolar probe connected to receive the output of said at least one second generator and cooperating with said first two unipolar probes in order to heat said area of said patient; and means for modifying the distribution forms of said electrical field from said first and said at least one second generator including means for inverting the plus, minus polarity of said electrical energy applied to at least to said two unipolar probes which are connected to said first generator.
Claim 3
Dependent Claim
47 words
A treatment device according to claim 1, wherein each of the said generators comprises commutation means for inverting the polarity applied to the two unipolar probes to which it is connected in order to modify the distribution of said electrical field in said are to be treated.
Claim 4
Dependent Claim
34 words
A treatment device according to claim 1, further comprising a main oscillator connected to said first and second generators for causing each of said first and second generators to operate at the same frequency.
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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) | 1992-04-17 | 1992-10-17 | 1993-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-17 | 1996-10-17 | 1997-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-17 | 2000-10-17 | 2001-04-18 | $7700.00 | Window Closed / Lapsed |