US3760148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for treating hair utilizing dielectric losses
Assignee: L'Oréal SA
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Filing: 1971-12-20
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Granted: 1973-09-18
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Expires: 1991-12-20
Abstract
Abstract Device for treating hair by dielectric losses in which most of the high frequency current utilized is generated within or closely adjacent an electromagnetically closed jacket which holds the hair to be treated.
Inventors
- 👤 G Boudouris
- 👤 G Kalopissis
- 👤 J Levesque
- 👤 P Roussopoulos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:11
CPC Classifications
A; A45; A45D; A45D2/00; A45D2/36
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
71 words
Device for treating hair by subjecting it to the action of a high frequency electromagnetic field which comprises an electromagnetically closed and electrically conductive jacket constituting a resonator, means inside said jacket for receiving the hair, coupling means for distributing high frequency electromagnetic energy inside the jacket and means closely associated with the jacket for producing at least the greater part of the high frequency electromagnetic energy dissipated in said resonator.
Claim 2
Dependent Claim
71 words
Device for treating hair by subjecting it to the action of a high frequency electromagnetic field which comprises an electromagnetically closed and electrically conductive jacket constituting a resonator, means inside said jacket for receiving the hair, coupling means for distributing high frequency electromagnetic energy inside the jacket and means closely associated with the jacket for producing at least the greater part of the high frequency electromagnetic energy dissipated in said resonator.
Claim 3
Dependent Claim
81 words
Device for treating hair by subjecting it to the action of a high frequency electromagnetic field which comprises an electromagnetically closed and electrically conductive jacket constituting a resonator, means inside said jacket for receiving the hair and a high frequency generator closely associated with the jacket for producing the electromagnetic energy dissipated in said resonator, said Resonator comprising a coupling member for distributing high frequency electromagnetic energy inside the jacket and said coupling member being a component of an oscillating circuit.
Claim 4
Dependent Claim
81 words
Device for treating hair by subjecting it to the action of a high frequency electromagnetic field which comprises an electromagnetically closed and electrically conductive jacket constituting a resonator, means inside said jacket for receiving the hair and a high frequency generator closely associated with the jacket for producing the electromagnetic energy dissipated in said resonator, said Resonator comprising a coupling member for distributing high frequency electromagnetic energy inside the jacket and said coupling member being a component of an oscillating circuit.
Claim 5
Dependent Claim
70 words
Device as claimed in claim 2 in which said generator comprises a transistor, the base of which is connected to a first coil, the other end of which coil is free, a source of direct current connected to the collector of said transistor through a second coil coaxial with the first, the emitter of said transistor being grounded and its base connected through a resistance to said direct current source.
Claim 6
Dependent Claim
57 words
Device as claimed in claim 2 in which the high-frequency generator has a symmetrical circuit comprising two identical transistors, the emitters of which are grounded, the bases of which are connected to each other through a coil and to a source of direct current through a coil coaxial with the coil connecting the bases of the transistors.
Claim 7
Dependent Claim
22 words
Device as claimed in claim 2 comprising means for producing pulses in a direct current supplying said generator to trigger oscillation thereof.
Claim 8
Dependent Claim
25 words
Device as claimed in claim 1 in which said coupling means is supplied by a high frequency generator supplied from a source of direct current.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |