US4785829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for hyperthermic treatment
Assignee: CGR MEV SA
•
Filing: 1986-12-03
•
Granted: 1988-11-22
•
Expires: 2006-12-03
Abstract
Abstract The invention pertains to an apparatus for hyperthermic treatment, especially designed for deep hyperthermia. The treatment apparatus comprises at least two generators operating at different frequencies in such a way as to prevent any phase correlation between the waves delivered by the generators.
Inventors
- 👤 Guy Convert
- 👤 Guy Azam
- 👤 Jean P. Mabire
- 👤 Claude Jasmin
- 👤 Joel Sidi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:36
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/323; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/1206; A61B2018/1273; A61B2018/128
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
136 words
Apparatus for hyperthermic treatment comprising high-frequency generating means connected to electrodes capable of being attached to a patient wherein the said generating means comprise at least two generators operating at different frequencies, the values of which are sufficiently distant from each to prevent the generators from mutually driving or interfering with one another's frequencies, the operating frequencies of the generators having values such that they do not constitute a harmonic frequency of one and the same fundamental frequency, and wherein the said generators comprise two outputs each linked to one electrode, at least one of the said outputs of at least one generator being connected to the said electrode by means of a bandpass filter, the resonance frequency of the said filter corresponding substantially to the operating frequency of the generator to which it is connected.
Claim 2
Dependent Claim
136 words
Apparatus for hyperthermic treatment comprising high-frequency generating means connected to electrodes capable of being attached to a patient wherein the said generating means comprise at least two generators operating at different frequencies, the values of which are sufficiently distant from each to prevent the generators from mutually driving or interfering with one another's frequencies, the operating frequencies of the generators having values such that they do not constitute a harmonic frequency of one and the same fundamental frequency, and wherein the said generators comprise two outputs each linked to one electrode, at least one of the said outputs of at least one generator being connected to the said electrode by means of a bandpass filter, the resonance frequency of the said filter corresponding substantially to the operating frequency of the generator to which it is connected.
Claim 3
Dependent Claim
16 words
Hyperthermic apparatus according to the claim 1, wherein the said generators each comprise a power-adjusting means.
Claim 4
Dependent Claim
24 words
Hyperthermic apparatus according to the claim 1, wherein at least one of the said generators comprise two output amplifiers operating at the same frequency.
Claim 5
Dependent Claim
17 words
Hyperthermic apparatus according to the claim 3, wherein the said output amplifiers each comprise a power-adjusting means.
Claim 6
Dependent Claim
24 words
Hyperthermic apparatus according to the claim 4, wherein each output amplifier comprises an output linked to an electrode and an output linked to ground.
Claim 7
Dependent Claim
48 words
Hyperthermic apparatus according to the claim 1, wherein the said generators are linked to the said electrodes by means of coaxial lines, the length of which is substantially a quarter of the length of the waves corresponding to the frequency of the generator to which they are connected.
Claim 8
Dependent Claim
23 words
Hyperthermic apparatus according to the claim 6, wherein the said coaxial lines have a characteristic impedance which is substantially equal to 25 Ohms.
Claim 9
Dependent Claim
20 words
Hyperthermic apparatus according to claim 1, wherein the said generators have at least one output linked to the same electrode
References Cited (Backward Citations)
GB467502A
Cited
FR818881A
Cited
US3096768A
Cited
DE2052994A1
Cited
US3774620A
Cited
US4148321A
Cited
US4121592A
Cited
US4095602A
Cited
DE2801796A1
Cited
US4177819A
Cited
US4401121A
Cited
US4285346A
Cited
US4290435A
Cited
US4350168A
Cited
DE3010716A1
Cited
US4572190A
Cited
US4587978A
Cited
GB2171832A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-22 | 1992-05-23 | 1992-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-22 | 1996-05-23 | 1996-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-22 | 2000-05-23 | 2000-11-22 | $7700.00 | Window Closed / Lapsed |