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US4734099A Expired / Lapsed US ⏱️ 0.0 years remaining

Elastomeric silicone depilatory

Assignee: Rhone Poulenc Specialites Chimiques
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Filing: 1986-03-05
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Granted: 1988-03-29
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Expires: 2006-03-05
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Abstract

Abstract Unwanted hair is removed from selected skin area by applying a coating of a curable organopolysiloxane composition thereon, permitting the organopolysiloxane composition to crosslink into a silicone elastomer, e.g., in the form of a solid layer or foam, and embed unwanted hair therein, and then stripping the silicone elastomer and embedded hair from said skin area, whereby said skin area is essentially depilated.

Inventors

  • 👤 Guy Cyprien

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 06:52
CPC Classifications
A; A61; A61Q; A61Q9/00; A61Q9/04; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/84; A61K8/89; A61K8/891; A61K8/892

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 155 words
A process for the removal of unwanted hair from predetermined skin area, comprising the steps of (a) applying to said skin area an effective depilating amount of a coating of a curable organopolysiloxane composition comprising (i) a diorganopolysiloxane polymer containing at least 2 vinyl radicals bonded to silicon atoms per molecule and having a viscosity of at least 50 mPa.s at 20 C., (ii) a diorganopolysiloxane polymer containing at least 3 hydrogen atoms bonded to silicon atoms per molecule and having a viscosity of at lesat 50 mPa.s at 20 C., (iii) a filler, and (iv) a metal catalyst wherein components (i)-(iv) are present in amounts sufficient to produce a composition which is effective for the removal of hair; (b) permitting said organopolysiloxane composition to crosslink into a silicone elastomer and embed unwanted hair therein; and (c) stripping the silicone elastomer and embedded hair from said skin area, whereby said skin area is essentially depilated.
Claim 2
Dependent Claim 155 words
A process for the removal of unwanted hair from predetermined skin area, comprising the steps of (a) applying to said skin area an effective depilating amount of a coating of a curable organopolysiloxane composition comprising (i) a diorganopolysiloxane polymer containing at least 2 vinyl radicals bonded to silicon atoms per molecule and having a viscosity of at least 50 mPa.s at 20 C., (ii) a diorganopolysiloxane polymer containing at least 3 hydrogen atoms bonded to silicon atoms per molecule and having a viscosity of at lesat 50 mPa.s at 20 C., (iii) a filler, and (iv) a metal catalyst wherein components (i)-(iv) are present in amounts sufficient to produce a composition which is effective for the removal of hair; (b) permitting said organopolysiloxane composition to crosslink into a silicone elastomer and embed unwanted hair therein; and (c) stripping the silicone elastomer and embedded hair from said skin area, whereby said skin area is essentially depilated.
Claim 3
Dependent Claim 16 words
The process as defined by claim 1, said catalyst comprising platinum or a platinum group metal.
Claim 4
Dependent Claim 22 words
The process as defined by claim 1, further comprising degreasing said predetermined skin area prior to application of said organopolysiloxane composition thereto.
Claim 5
Dependent Claim 133 words
A process for the removal of unwanted hair from predetermined skin area, comprising the steps of (a) applying to said skin area an effective depilating amount of a coating of a curable organopolysiloxane composition comprising (i) an alpha,omega-dihydroxydiorganopolysiloxane oil, (ii) a filler, (iii) a crosslinking agent which comprises a silane containing at least three hydrolyzable groups or a polysiloxane originating from the partial hydrolysis of such silane, and (iv) a metal catalyst, an amine, or mixture thereof wherein components (i)-(iv) are present in amounts sufficient to produce a composition which is effective for the removal of hair; (b) permitting said organopolysiloxane composition to crosslink into a silicone elastomer and embed unwanted hair therein; and (c) stripping the silicone elastomer and embedded hair from said skin area, whereby said skin area is essentially depilated.
Claim 6
Dependent Claim 133 words
A process for the removal of unwanted hair from predetermined skin area, comprising the steps of (a) applying to said skin area an effective depilating amount of a coating of a curable organopolysiloxane composition comprising (i) an alpha,omega-dihydroxydiorganopolysiloxane oil, (ii) a filler, (iii) a crosslinking agent which comprises a silane containing at least three hydrolyzable groups or a polysiloxane originating from the partial hydrolysis of such silane, and (iv) a metal catalyst, an amine, or mixture thereof wherein components (i)-(iv) are present in amounts sufficient to produce a composition which is effective for the removal of hair; (b) permitting said organopolysiloxane composition to crosslink into a silicone elastomer and embed unwanted hair therein; and (c) stripping the silicone elastomer and embedded hair from said skin area, whereby said skin area is essentially depilated.
Claim 7
Dependent Claim 13 words
The process as defined by claim 4, said catalyst comprising a tin salt.
Claim 8
Dependent Claim 19 words
The process as defined by claim 4, said filler having been treated with chlorosilane, a siloxane or a disilazane.
Claim 9
Dependent Claim 22 words
The process as defined by claim 4, further comprising degreasing said predetermined skin area prior to application of said organopolysiloxane composition thereto.
Claim 10
Dependent Claim 163 words
A process for the removal of unwanted hair from predetermined skin area, comprising the steps of (i) applying to said skin area an effective depilating amount of a coating of a curable organopolysiloxane composition comprising (a) an alpha,omega-dihydroxydiorganopolysiloxane polymer having a viscosity of at least 50 mPa.s at 25° C., (b) a diorganopolysiloxane polymer containing from 1 to 75 % by weight of siloxane units containing a hydrogen atom bonded directly to a silicon atom, (c) up to 50% by weight, based on the weight of the polymer (a), of at least one silanol, low molecular weight hydroxylated siloxane, water or alcohol, and (d) tin catalyst wherein components (a)-(d) are present in amounts sufficient to produce a composition which is effective for the removal of hair; (ii) permitting said organopolysiloxane composition to crosslink into an elastomeric silicone foam and embed unwanted hair therein; and (iii) stripping the silicone foam and embedded hair from said skin area, whereby said skin area is essentially depilated.
Claim 11
Dependent Claim 163 words
A process for the removal of unwanted hair from predetermined skin area, comprising the steps of (i) applying to said skin area an effective depilating amount of a coating of a curable organopolysiloxane composition comprising (a) an alpha,omega-dihydroxydiorganopolysiloxane polymer having a viscosity of at least 50 mPa.s at 25° C., (b) a diorganopolysiloxane polymer containing from 1 to 75 % by weight of siloxane units containing a hydrogen atom bonded directly to a silicon atom, (c) up to 50% by weight, based on the weight of the polymer (a), of at least one silanol, low molecular weight hydroxylated siloxane, water or alcohol, and (d) tin catalyst wherein components (a)-(d) are present in amounts sufficient to produce a composition which is effective for the removal of hair; (ii) permitting said organopolysiloxane composition to crosslink into an elastomeric silicone foam and embed unwanted hair therein; and (iii) stripping the silicone foam and embedded hair from said skin area, whereby said skin area is essentially depilated.
Claim 12
Dependent Claim 22 words
The process as defined by claim 8, further comprising degreasing said predetermined skin area prior to application of said organopolysiloxane composition thereto.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-03-29 1991-09-28 1992-03-29 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-03-29 1995-09-28 1996-03-29 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-03-29 1999-09-28 2000-03-29 $7700.00 Window Closed / Lapsed

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