Patent US5284472A successfully refreshed from Google Patents.
US5217455A
Expired / Lapsed
US
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Laser treatment method for removing pigmentations, lesions, and abnormalities from the skin of a living human
Assignee: Cynosure LLC
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Filing: 1991-08-12
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Granted: 1993-06-08
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Expires: 2011-08-12
Abstract
Abstract A laser treatment method is provided which removes pigmentations, lesions, and abnormalities from the skin of a living human. The methodology comprises a carefully controlled irradiation of the chosen treatment site on the skin of a living human; avoids the creation of cosmetically disfiguring scars; and eliminates the typical hypopigmentation as well as the pitting and other changes in skin texture normally accompanying conventionally known laser treatment techniques.
Inventors
- 👤 Oon T. Tan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:47
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/18; A61B18/20; A61B18/203; A61B17/00; A61B2017/00743; A61B2017/00747; A61B2017/00761; A61B2017/00769; A61B2018/00315; A61B2018/00452; A61B2018/00636; A61B90/00; A61B90/03; A61B2090/033; A61B2090/036
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
225 words
A laser treatment method for removing a tattoo from the skin of a living human, said method comprising the steps of: irradiating on a first occasion a chosen treatment site on the skin of a living human of about 1-100 millimeters in diameter with a beam of pulsed light from a laser delivery system, said pulsed light having a wavelength from about 600-1,100 nanometers, fluences of about 1-20 Joules per square centimeter, and a pulse duration of about 10-300 nanoseconds; maintaining said irradiation to disrupt the tattoo on the chosen treatment site on the skin of the living human until a color change endpoint on the skin surface is achieved by said laser light treatment while largely avoiding the destruction of normal skin structures and cells; allowing the skin at said irradiated treatment site to heal for a time period not less than about 7 days and not more than about 70 days; and then irradiating on at least one subsequent occasion the chosen treatment site on the skin of the living human with another pulsed beam of laser light having a wavelength from about 600 to 1,100 nanometers, fluences of about 1-20 Joules per square centimeter, and a pulse duration of about 10-300 nanoseconds, said subsequent irradiation occasion being repeated as necessary to achieve substantial clearance of the chosen treatment site on the skin.
Claim 2
Dependent Claim
225 words
A laser treatment method for removing a tattoo from the skin of a living human, said method comprising the steps of: irradiating on a first occasion a chosen treatment site on the skin of a living human of about 1-100 millimeters in diameter with a beam of pulsed light from a laser delivery system, said pulsed light having a wavelength from about 600-1,100 nanometers, fluences of about 1-20 Joules per square centimeter, and a pulse duration of about 10-300 nanoseconds; maintaining said irradiation to disrupt the tattoo on the chosen treatment site on the skin of the living human until a color change endpoint on the skin surface is achieved by said laser light treatment while largely avoiding the destruction of normal skin structures and cells; allowing the skin at said irradiated treatment site to heal for a time period not less than about 7 days and not more than about 70 days; and then irradiating on at least one subsequent occasion the chosen treatment site on the skin of the living human with another pulsed beam of laser light having a wavelength from about 600 to 1,100 nanometers, fluences of about 1-20 Joules per square centimeter, and a pulse duration of about 10-300 nanoseconds, said subsequent irradiation occasion being repeated as necessary to achieve substantial clearance of the chosen treatment site on the skin.
Claim 3
Dependent Claim
31 words
The laser treatment method as recited in claim 1 wherein said irradiation of the chosen treatment site on the skin is controlled to avoid causing whiteness and pitting of the skin.
Claim 4
Dependent Claim
27 words
The laser treatment method as recited in claim 1 wherein said irradiation on the first occasion employs a lesser fluence value than said irradiation on said subsequent.
Claim 5
Dependent Claim
28 words
The laser treatment method as recited in claim 1 wherein said irradiation on said first occasion employs a greater fluence valve than said irradiation on said subsequent occasion.
Claim 6
Dependent Claim
22 words
The laser treatment method as recited in claim 1 wherein said irradiation employs laser light having a wavelength of from 750-800 nanometers.
Claim 7
Dependent Claim
59 words
The laser treatment method as recited in claim 1 further comprising additional irradiations on subsequent occasions of the chosen treatment site on the skin of the living human, each of said irradiations employing pulsed laser light having a wavelength of about 600-1,000 nanometers, fluences of about 1-20 Joules per square centimeter, and a pulse duration of about 10-300 nanoseconds.
Claim 8
Dependent Claim
28 words
The laser treatment method as recited in claim 1 further comprising applying a topical antibiotic preparation to the chosen treatment site on the skin after each irradiation occasion.
Claim 9
Dependent Claim
223 words
A laser treatment method for removing a tattoo from the skin of a living human, said method comprising the steps of: irradiating on a first occasion a chosen treatment site on the skin of a living human of about 1-100 millimeters in diameter with a beam of pulsed light from a laser delivery system, said pulsed light having a wavelength from about 600-1,100 nanometers, fluences of about 1-20 Joules per square centimeter, and a pulse duration of about 10-300 nanoseconds; maintaining said irradiation of the chosen treatment site to disrupt the tattoo on the skin of the living human until a color change endpoint on the skin surface is achieved by said laser light treatment while largely avoiding the destruction of normal skin structures and cells; allowing the skin at said irradiated treatment site to heal for a time period not less than about 7 days and not more than about 70 days; and then irradiating on multiple subsequent occasions the chosen treatment site on the skin of the living human with another pulsed beam of laser light having a wavelength from about 600 to 1,100 nanometers, fluences of about 1-20 Joules per square centimeter, and a pulse duration of about 10-300 nanoseconds, said subsequent irradiation occasions being repeated as necessary to achieve substantial clearance of the chosen treatment site on the skin.
Claim 10
Dependent Claim
223 words
A laser treatment method for removing a tattoo from the skin of a living human, said method comprising the steps of: irradiating on a first occasion a chosen treatment site on the skin of a living human of about 1-100 millimeters in diameter with a beam of pulsed light from a laser delivery system, said pulsed light having a wavelength from about 600-1,100 nanometers, fluences of about 1-20 Joules per square centimeter, and a pulse duration of about 10-300 nanoseconds; maintaining said irradiation of the chosen treatment site to disrupt the tattoo on the skin of the living human until a color change endpoint on the skin surface is achieved by said laser light treatment while largely avoiding the destruction of normal skin structures and cells; allowing the skin at said irradiated treatment site to heal for a time period not less than about 7 days and not more than about 70 days; and then irradiating on multiple subsequent occasions the chosen treatment site on the skin of the living human with another pulsed beam of laser light having a wavelength from about 600 to 1,100 nanometers, fluences of about 1-20 Joules per square centimeter, and a pulse duration of about 10-300 nanoseconds, said subsequent irradiation occasions being repeated as necessary to achieve substantial clearance of the chosen treatment site on the skin.
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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) | 1996-06-07 | 1996-12-07 | 1997-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-07 | 2000-12-07 | 2001-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-07 | 2004-12-07 | 2005-06-08 | $7700.00 | Window Closed / Lapsed |