Patent US5549660A successfully refreshed from Google Patents.
US5549660A
Expired / Lapsed
US
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Method of treating acne
Assignee: SYRO RESEARCH & DEVELOPMENT TECHNOLOGIES Ltd
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Filing: 1992-11-12
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Granted: 1996-08-27
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Expires: 2012-11-12
Abstract
Abstract A method of treating acne by illumination comprising the steps of utilizing at least one light emitting diode (LED) by driving each of the at least one LEDs in substantially continuous wave (CW) mode of operation to generate CW light radiation in a narrow bandwidth centered at a wavelength suitable for acne relief, concentrating and projecting the CW light radiation onto an acne-affected dermal zone for biostimulative treatment thereof and maintaining the light radiation for a prescribed treatment duration, wherein each of the at least one LEDs emits light of substantially the same wavelength and wherein the acne affected dermal zone is not simultaneously illuminated by stimulating radiation of another wavelength.
Inventors
- 👤 Emanuel Mendes
- 👤 Gideon Iron
- 👤 Avikam Harel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:12
CPC Classifications
A; A61; A61N; A61N5/00; A61N5/06; A61N5/0613; A61N5/0616; A61N2005/065; A61N2005/0651; A61N2005/0652; A61N2005/0658; A61N2005/0659
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
98 words
A method of treating acne with red light radiation, the method comprising the steps of: (a) providing a plurality of light emitting diodes which generate non-coherent radiation in a narrow bandwidth centered at a wavelength of approximately 660 nm, (b) driving the diodes exclusively in a continuous wave mode to generate the non-coherent radiation, (c) concentrating and projecting the non-coherent radiation on a dermal area afflicted with acne without simultaneously illuminating the area with non-coherent light emitting diode radiation centered about a different wavelength and (d) maintaining the concentrating and projecting step (c) for a prescribed treatment duration.
Claim 2
Independent Claim
98 words
A method of treating acne with red light radiation, the method comprising the steps of: (a) providing a plurality of light emitting diodes which generate non-coherent radiation in a narrow bandwidth centered at a wavelength of approximately 660 nm, (b) driving the diodes exclusively in a continuous wave mode to generate the non-coherent radiation, (c) concentrating and projecting the non-coherent radiation on a dermal area afflicted with acne without simultaneously illuminating the area with non-coherent light emitting diode radiation centered about a different wavelength and (d) maintaining the concentrating and projecting step (c) for a prescribed treatment duration.
Claim 3
Dependent Claim
41 words
A method of treating acne with red light radiation in accordance with claim 1 wherein the radiation is concentrated and projected on the acne afflicted area with an illumination power in the range of between 10 and 30 mw/cm 2 .
Claim 4
Dependent Claim
31 words
A method of treating acne with red light radiation in accordance with claim 1 wherein the radiation is concentrated and projected on the acne afflicted area in a substantially circular pattern.
Claim 5
Dependent Claim
27 words
A method of treating acne with red light radiation in accordance with claim 3 wherein the substantially circular pattern has a diameter in the order 1 cm.
Claim 6
Dependent Claim
24 words
A method of treating acne with red light radiation in accordance with claim 4 wherein the diameter is in the order of 1.2 cm.
Claim 7
Dependent Claim
54 words
A method of treating acne with red light radiation in accordance with claim 3 wherein the step of concentrating and projecting the non-coherent radiation includes the steps of projecting a cone of light from each light emitting diode of the plurality and of directing the cones of light to intersect in the circular pattern.
Claim 8
Dependent Claim
58 words
A method of treating acne with red light radiation in accordance with claim 1 wherein the step of driving the diodes exclusively in a continuous wave mode to generate non-coherent radiation includes the step of controlling the intensity of the non-coherent radiation by controlling the amplitude and duty cycle at which the light emitting diodes are being driven.
Claim 9
Dependent Claim
37 words
A method of treating acne with red light radiation in accordance with claim 1 wherein the step of concentrating and projecting the non-coherent radiation includes the step of mounting the plurality of diodes in a planar array.
Claim 10
Dependent Claim
31 words
A method of treating acne with red light radiation in accordance with claim 8 wherein the step of mounting includes mounting the plurality of diodes in at least one circular array.
Claim 11
Dependent Claim
31 words
A method of treating acne with red light radiation in accordance with claim 8 wherein the step of mounting includes mounting the plurality of diodes in at least one linear array.
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) | 1999-08-27 | 2000-02-26 | 2000-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-27 | 2004-02-26 | 2004-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-27 | 2008-02-26 | 2008-08-27 | $7700.00 | Window Closed / Lapsed |