US5059192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of hair depilation
Assignee: Individual
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Filing: 1990-04-24
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Granted: 1991-10-22
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Expires: 2010-04-24
Abstract
Abstract A method of depilation using a ruby red laser includes supplying optimum energy to a selected area of skin to cause follicular injury to the extent that depilation occurs without epidermal scaring.
Inventors
- 👤 Nardo Zaias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:28
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/18; A61B18/20; A61B18/203; A61B2018/00315; A61B2018/00452; A61B2018/00476
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
95 words
A method of hair depilation, comprising the steps of: a) aligning a laser light applicator substantially vertically over a hair follicle opening, said applicator having an aperture of sufficient area to surround a hair follicle and overlie its papilla; b) applying through said aperture to the hair follicle a pulse of laser energy of a wavelength which is readily absorbed by the melanin of the papilla and having a radiant exposure dose of sufficient energy and duration to damage its papilla so that hair regrowth is prevented and scarring of the surrounding skin is avoided.
Claim 2
Independent Claim
95 words
A method of hair depilation, comprising the steps of: a) aligning a laser light applicator substantially vertically over a hair follicle opening, said applicator having an aperture of sufficient area to surround a hair follicle and overlie its papilla; b) applying through said aperture to the hair follicle a pulse of laser energy of a wavelength which is readily absorbed by the melanin of the papilla and having a radiant exposure dose of sufficient energy and duration to damage its papilla so that hair regrowth is prevented and scarring of the surrounding skin is avoided.
Claim 3
Dependent Claim
26 words
The method of hair depilation as set forth in claim 1, wherein: a) said laser light applicator includes an aperture diameter of at least three millimeters.
Claim 4
Dependent Claim
35 words
The method of hair depilation as set forth in claim 1, wherein: a) said applied radiant exposure dose is between 0.4 j/cm 2 and 10 j/cm 2 for a duration of less than one microsecond.
Claim 5
Dependent Claim
35 words
The method of hair depilation as set forth in claim 1, further including the step of: a) damaging the hair follicle by applying an energy pulse to specifically destroy melanosomes using a Q-switched ruby laser.
Claim 6
Dependent Claim
29 words
The method of hair depilation as set forth in claim 1, wherein: a) the duration of the laser energy pulse is in the range of thirty to forty nanoseconds.
Claim 7
Dependent Claim
29 words
The method of hair depilation as set forth in claim 1, wherein: a) the wavelength of the laser energy is closely matched to the absorption spectrum of the melanin.
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) | 1994-10-21 | 1995-04-22 | 1995-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-21 | 1999-04-22 | 1999-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-21 | 2003-04-22 | 2003-10-22 | $7700.00 | Window Closed / Lapsed |