Method and apparatus for dyeing hair fibres using radio frequency electromagnetic radiation

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11872295
APP PUB NO 20230181429A1
SERIAL NO

16956427

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The present invention relates to a method for dyeing hair fibres, in particular a method which involves coating hair fibres with a hair dye composition and directing radio frequency electromagnetic radiation to the coated hair fibres to cause heating within the coated hair fibres by dielectric loss. The present invention also relates to kits and appliances for use in connection with the method, as well as the use of radio frequency electromagnetic radiation in reducing the effective dye-treatment time for hair fibres. In one aspect, there is provided a method of dyeing hair fibres, said method comprising the steps of: i) coating one or more hair fibres with a hair dye composition; and ii) directing radio frequency electromagnetic radiation having one or more frequencies from 1 MHz to 300 MHz to the one or more coated hair fibres to cause heating within the one or more coated hair fibres by dielectric loss. Preferably, the hair dye composition used in step i) is a permanent or demi-permanent hair dye composition that may be prepared by combining a dye lotion containing one or more dye precursors and an activator solution containing an activating agent, wherein the activating agent in the activator solution converts the one or more dye precursors in the dye lotion to active dye agents.

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Patent Owner(s)

Patent OwnerAddress
JEMELLA LIMITEDLEEDS YORKSHIRE LS11 5BZ

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Godfrey, Simon Cambridge, GB 3 0
Herrlein, Mathias Cambridge, GB 5 57
James, Matthew Cambridge, GB 6 17
Moore, Timothy David Cambridge, GB 14 104
Riedel, Hendrik Cambridge, GB 1 0
Williamson, Roger Cambridge, GB 10 104
Wright, Liam Cambridge, GB 3 7

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