Device For Treating The Hair
Patent No. EP4422456 (titled "Device For Treating The Hair") was filed by L'Oreal on Oct 27, 2022. The application was issued on Aug 13, 2025.
Patent Summary
A hair treatment device, specifically for shaping, straightening, curling, or crimping, comprises at least one active portion featuring at least one light emission source. This source emits light radiation toward the hair with a dominant wavelength peak between 0.8 µm and 5 µm. Embodiments include infrared light-emitting diodes or carbon infrared emitters, such as halogen lamps with carbon filaments. The device may include jaws, each carrying an active portion, and a sensor configured to deactivate the light source when the jaws open. A corresponding treatment method exposes hair locks to the specified radiation, optionally incorporating steam treatment with a flow rate typically between 0.7 and 0.9 g/min (and generally less than 1 g/min) to achieve effective, durable shaping while preserving the hair fiber.
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Date
Description
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EP4422456
- Application Number
- EP22809456A
- Filing Date
- Oct 27, 2022
- Status
- Granted And Under Opposition
- Jul 11, 2025
- Publication Date
- Aug 13, 2025
- External Links
- Slate, Register , Google Patents