# US 11,304,506 B2 · Brush for applying a cosmetic product, related method and kit

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- Number: US 11,304,506 B2
- Document ID: US11304506B2
- Status: Granted
- Kind: B2
- Application number: 16/323,955
- Filed: 2017-08-03
- Published: 2019-06-06
- Granted: 2022-04-19
- Earliest claimed: 2016-08-11
- Assignees: L'oreal
- Applicants: L'oreal
- Inventors: Clemence Taine; Cecile Eurippini
- Web page: https://patentgrep.com/patent/US11304506B2

## CPC

- A46B 9/023: {arranged like in hair brushes, e.g. hair treatment, dyeing, streaking}
- A45D 19/012: {Devices for colouring or bleaching separated strands of hair, e.g. highlighting (A45D19/02 and A45D19/18 take precedence)}
- A46D 1/0253: {Bristles having a shape which is not a straight line, e.g. curved, "S", hook, loop}
- A45D 2200/25: Kits
- A46B 2200/1046: Brush used for applying cosmetics
- A46B 2200/1053: Cosmetics applicator specifically for mascara
- A46B: BRUSHES (handles not integral with brushware B25G)
- A45D: HAIRDRESSING OR SHAVING EQUIPMENT (wigs, toupees or the like A41G3/00, A41G5/00; hairdressers' chairs A47C1/04; hair cutting appliances, razors B26B); EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
- A46D: MANUFACTURE OF BRUSHES

## Abstract

Brush (10) for application of a cosmetic product, particularly a hair coloring and/or care product, comprising: —a handle (12)—a product applicator (14) projecting from the handle (12), the applicator (14) comprising crimped fibers (40). The crimped fibers (40) are between 0.25 mm and 0.45 mm thick and the crimp wave length is between 2.0 mm and 4.0 mm.

## Claims

### Claim 1

A brush for application of a cosmetic product, which is a hair coloring and/or hair care product, comprising:
a handle
a product applicator projecting from the handle, the applicator comprising crimped fibers, which are in the form of tufts,
wherein the crimp wave length is between 2.0 mm and 4.0 mm, and
wherein the thickness of the crimped fibers is between 0.30 mm and 0.38 mm, wherein the maximum space between consecutive tufts is between 1.5 mm and 2.5 mm and the ratio between the diameter of each tuft and the space between two consecutive tufts is between 1 and 2.

### Claim 2 (depends on 1)

The brush according to claim 1, wherein the crimp wave length (B) of the crimped fibers is between 3.0 mm and 3.5 mm.

### Claim 3 (depends on 1)

The brush according to claim 1, wherein each crimped fiber present is longer than 1.3 cm.

### Claim 4 (depends on 1)

The brush according to claim 1, wherein the transverse amplitude (A) of the waves of the crimped fibers is between 0.5 mm and 0.7 mm.

### Claim 5 (depends on 1)

The brush according to claim 1, wherein the crimped fibers form discontiguous tufts distributed transversely on the handle.

### Claim 6 (depends on 5)

The brush according to claim 5, wherein the ratio between the maximum thickness of each tuft and the maximum space between two adjacent tufts is between 1 and 2.

### Claim 7 (depends on 6)

The brush according to claim 6, wherein the maximum space between two adjacent tufts is between 1.5 and 2.5 mm.

### Claim 8 (depends on 1)

The brush according to claim 1, wherein the applicator has a beveled upper edge.

### Claim 9 (depends on 1)

The brush according to claim 1, wherein each crimped fiber present is longer than 1 cm.

### Claim 10 (depends on 1)

The brush according to claim 1, wherein the handle comprises a head defining two opposite dished gripping zones.

### Claim 11 (depends on 1)

A method of applying a cosmetic product including the following steps:
impregnation of a brush according to claim 1 with a cosmetic product;
application of the applicator of the brush on the keratin fibers and/or on the scalp.

### Claim 12 (depends on 1)

An application kit comprising a brush according to claim 1 and a cosmetic product.

### Claim 13 (depends on 12)

The kit according to claim 12 wherein the cosmetic product is a coloring and/or a care product for hair, keratin fibers and the scalp.

### Claim 14 (depends on 12)

The kit according to claim 12, wherein the viscosity of the cosmetic product is between 200 mPa·s and 3000 mPa·s measured at 25° C., with a shear rate of 50 s-1.

### Claim 15 (depends on 2)

The brush according to claim 2, wherein each crimped fiber present is longer than 1.3 cm.

### Claim 16 (depends on 2)

The brush according to claim 2, wherein the transverse amplitude (A) of the waves of the crimped fibers is between 0.5 mm and 0.7 mm.

### Claim 17 (depends on 3)

The brush according to claim 3, wherein the transverse amplitude (A) of the waves of the crimped fibers is between 0.5 mm and 0.7 mm.

### Claim 18 (depends on 2)

The brush according to claim 2, wherein the crimped fibers form discontiguous tufts distributed transversely on the handle.

### Claim 19 (depends on 3)

The brush according to claim 3, wherein the crimped fibers form discontiguous tufts distributed transversely on the handle.

### Claim 20 (depends on 4)

The brush according to claim 4, wherein the crimped fibers form discontiguous tufts distributed transversely on the handle.