Madeleine Leduc

This inventor holds 54 USPTO granted patents and 1 published patent application and 6 EPO patents, primarily in Dye Composition Technology (CPC class 424 ). Top assignees: L'oreal, Societe L'oreal Sa, Loreal Sa. Active years: 1986-2017.

USPTO Granted Patents = 54 (Patent Applications = 1)

% Patents Active = 77.8

EPO Patents = 6 (Patent Applications = 9)

Average Co-Inventor Count = 2.9

ph-index = 11

Forward Citations = 642(Granted Patents)

Forward Citations (Not Self Cited) = 626(Dec 10, 2025)

Inventors with similar research interests:

Company Filing History:

4. 1 out of 834,307

Other

patents

Years Active: 1986-2017

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Areas of Expertise:

Azomethine Dyes

Keratin Dyeing

Photoprotective Agents

Cationic Dyes

Siloxane Compounds

Sunscreen Compositions

Cyclodextrin Derivatives

Dicationic Diazo Dyes

Pyrrolidinyl Derivatives

Hair Dyeing Processes

UV Filters

Cosmetic Compositions

54 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 9554977 - Triaromatic azomethine direct dyes, dye composition comprising at least one such dye, method of implementation and use (2017-01-31),

2. 9226883 - Particular azomethine direct dyes, dye composition comprising at least one such compound, implementation process therefore and use thereof (2016-01-05),

3. 8771376 - Composition comprising at least one 2-pyrrolidone functionalized with an ester or amide radical, and at least one pigment or direct dye, for dyeing keratin materials (2014-07-08),

4. 8585779 - Composition comprising at least one 2-pyrrolidone functionalized in the 4 position with a carboxylic acid or amide, and at least one direct dye or a pigment for dyeing keratin fibres (2013-11-19),

5. 8105394 - Azomethine direct dyes or reduced precursors of azomethine direct dyes obtained from 2-alkylresorcinols, and hair dyeing process using these dyes or precursors (2012-01-31),

6. 8083809 - Azomethine direct dyes or reduced precursors of these dyes obtained from 2-chloro-3-amino-6-methylphenol, and hair dyeing method starting from these dyes and precursors (2011-12-27),

7. 8066782 - Azomethine direct dyes or reduced precursors of azomethine direct dyes obtained from 2-alkylresorcinols, and hair dyeing process using these dyes or precursors (2011-11-29),

8. 7132534 - Para-phenylenediamine derivatives containing a pyrrolidyl group, and use of these derivatives for coloring keratin fibers (2006-11-07),

9. 7090703 - Para-phenylenediamine derivatives comprising a cyclic diaza group substituted with a cationic radical, and use of these derivatives for dyeing keratin fibers (2006-08-15),

10. 6946005 - Pyrrolidinyl-substituted para-phenylenediamine derivatives substituted with a cationic radical, and use of these derivatives for dyeing keratin fibers (2005-09-20),

11. 6923835 - Bis-para-phenylenediamine derivatives comprising a pyrrolidyl group and use of these derivatives for dyeing keratin fibres (2005-08-02),

12. 6884266 - Dyeing composition for dyeing keratinous fibers comprising a cationic azo-dye (2005-04-26),

13. 6884265 - Dyeing composition for dyeing keratinous fibers comprising at least one particular dicationic diazo dye (2005-04-26),

14. 6730789 - Composition for dyeing keratinous fibers containing 3 amino pyrazolo- [1,5-a] pyridines, dyeing method, novel 3-amino pyrazolo-[1,5-a] pyridines (2004-05-04),

15. 6667343 - Siloxane dyes, compositions containing them and uses thereof (2003-12-23),

Title: The Innovative Mind of Madeleine Leduc

Introduction: Madeleine Leduc, a pioneering inventor hailing from Paris, FR, is known for her groundbreaking contributions to the field of technology and innovation.

Latest Patents: Madeleine Leduc's latest patents focus on advancements in renewable energy technologies, particularly in the development of solar-powered devices for sustainable living.

Career Highlights: With a career spanning over two decades, Madeleine Leduc has established herself as a leading figure in the tech industry, with a strong focus on eco-friendly solutions and cutting-edge inventions.

Collaborations: Throughout her career, Madeleine Leduc has collaborated with top research institutions and universities to further her innovative projects, showcasing her dedication to pushing the boundaries of technological advancement.

Conclusion: Madeleine Leduc's passion for innovation and commitment to creating a more sustainable future through her inventions make her a true trailblazer in the world of technology.