US4830633A
Expired / Lapsed
US
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Depilation method
Assignee: Nitto Denko Corp
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Filing: 1987-06-22
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Granted: 1989-05-16
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Expires: 2007-06-22
Abstract
Abstract A depilation method is disclosed, comprising coating a depilatory agent containing an aqueous solution or emulsion of a polymer compound having a film forming ability and a depilatory medicine, drying the resulting coating to form a film and peeling off the film. This method permits to remove hair without causing any pain and producing any unpleasant odor due to the decomposition of hair.
Inventors
- 👤 Yutaka Hori
- 👤 Katsuo Matsumoto
- 👤 Katsuhiro Yamamoto
- 👤 Toshimitsu Sasaki
- 👤 Masayuki Shida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:18
CPC Classifications
A; A61; A61Q; A61Q9/00; A61Q9/04; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/46; A61K8/72; A61K8/81; A61K8/817; A61K8/8176
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
95 words
A depilation method which comprises coating a depilatory agent containing an aqueous solution or emulsion of a polymer compound having a film forming ability and present in an amount effective to form a film, and as a depilatory, thioglycolic acid or a salt thereof, strontium sulfate, sodium sulfide or potassium sulfide in an amount effective to act as a depilatory, on a portion of skin where hair is to be removed, drying the resulting coating by bonding a water absorption sheet to the depilatory agent coated to form a film and peeling off the film.
Claim 2
Dependent Claim
95 words
A depilation method which comprises coating a depilatory agent containing an aqueous solution or emulsion of a polymer compound having a film forming ability and present in an amount effective to form a film, and as a depilatory, thioglycolic acid or a salt thereof, strontium sulfate, sodium sulfide or potassium sulfide in an amount effective to act as a depilatory, on a portion of skin where hair is to be removed, drying the resulting coating by bonding a water absorption sheet to the depilatory agent coated to form a film and peeling off the film.
Claim 3
Dependent Claim
22 words
The method as in claim 1, wherein the polymer compound having a film forming ability is a water-soluble or water-insoluble polymer substance.
Claim 4
Dependent Claim
47 words
The method as in claim 2, wherein the water-soluble polymer substance is at least one selected from the group consisting of polyvinyl pyrrolidone, polyacrylamide, polyacrylic acid and its salts, polyvinyl alcohol, carboxymethyl cellulose, hydroxypropyl cellulose, gelatin, alginic acid salts, polyethylene glycol, polyvinyl methyl ether and gum arabic.
Claim 5
Dependent Claim
61 words
The method as claimed in claim 2, wherein the water-insoluble polymer substance is at least one selected from the group of natural rubber, synthetic rubber, polyvinyl acetate, homo- and copolymers of acrylic acid or methacrylic acid esters, and copolymers of polar monomers containing or not containing a functional group selected from the grup consisting of amino, amido, hydroxyl, carboxyl and epoxy.
Claim 6
Dependent Claim
21 words
The method as in claim 1, wherein the viscosity of the depilatory agent is 0.1 to 1,000 poises at 30° C.
Claim 7
Dependent Claim
50 words
The method as in claim 2, wherein the depilatory agent comprises 1 to 15 wt% of said thioglycolic acid or salt thereof, strontium sulfate, sodium sulfide or potassium sulfide, 1 to 70 wt% of a water-soluble polymer substance and water, said agent being in the form of an aqueous solution.
Claim 8
Dependent Claim
49 words
The method as in claim 2, wherein the depilatory agent comprises 1 to 15 wt% of said thioglycolic acid or salt thereof, strontium sulfate, sodium sulfide or potassium sulfide, 1 to 70 wt% of a water-insoluble polymer substance and water, said agent being in the form of an emulsion.
Claim 9
Dependent Claim
20 words
The method as in claim 6, wherein the depilatory agent further contains 0.1 to 5 wt% of an alkali agent.
Claim 10
Dependent Claim
19 words
The method as in claim 7, wherein the depilatory agent further contains 0.1 to 5 wt% of alkali agent.
Claim 11
Dependent Claim
28 words
The method as in claim 1, wherein the drying treatment is conducted utilizing in combination the water absorbing capability of the water absorbing sheet and a heating treatment.
Claim 12
Dependent Claim
22 words
The method as in claim 10, wherein the heating treatment is conducted at 50° to 200° C. for 1 to 10 minutes.
Claim 13
Dependent Claim
18 words
The method as in claim 1, wherein the water content of the film is 0.1 to 40 wt%.
Claim 14
Dependent Claim
25 words
The method as in claim 1, wherein a pressure-sensitive adhesive sheet is adhered to the surface of the film and the assembly is peeled off.
Claim 15
Dependent Claim
19 words
The method as in claim 13, wherein the size of the pressure-sensitive adhesive sheet is larger than the film.
Claim 16
Dependent Claim
15 words
The method as in claim 1, wherein the depilatory agent further contains a film-reinforcing agent.
Claim 17
Dependent Claim
14 words
The method as in claim 15, wherein the film-reinforcing agent is a short fiber.
References Cited (Backward Citations)
CA518873A
Cited
US2067909A
Cited
GB798066A
Cited
DE1467756A1
Cited
FR2204398A1
Cited
JPH05236111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-15 | 1992-11-14 | 1993-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-15 | 1996-11-14 | 1997-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-15 | 2000-11-14 | 2001-05-16 | $7700.00 | Window Closed / Lapsed |