Pierre Dufresne

This inventor holds 57 USPTO granted patents and 1 published patent application, plus 15 CIPO patents and 23 EPO patents, primarily in Catalyst Technology (CPC class B01J). Top assignees: Eurecat S.a., Institut Francais Du Pe'trole, Europeenne De Retraitement De Catalyseurs Eurecat. Active years: 1985-2020.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Pierre Dufresne. Retrieved from https://idiyas.com/inventor/pierre-dufresne

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Calculating rank

USPTO Granted Patents = 57 (Patent Applications = 1)

% Patents Active = 98.2

CIPO Patents = 15

EPO Patents = 23 (Patent Applications = 17)

Average Co-Inventor Count = 2.7

ph-index = 11

Forward Citations = 409(Granted Patents)

Forward Citations (Not Self Cited) = 372(Dec 10, 2025)

Inventors with similar research interests:

Location History:

Rueil Malmaison, FR (1985 - 1996)
Valence, FR (1994 - 2018)
Acouste sur Sye, FR (2018)
Aouste sur Sye, FR (2018 - 2020)

Company Filing History:

Institut Francais Du Pe'trole

patents

6 out of 14

Europeenne De Retraitement De Catalyseurs Eurecat

patents

4. 4 out of 1,208

IFP Energies Nouvelles

Centre National De La Recherche Scientifique

patents

7. 1 out of 3

Europeene De Retraitement De Catalyseurs-Eurecat

patents

8. 1 out of 1

Europeene De Retraitment De Catalyseurs

patent

9. 1 out of 1

Europeene De Retraitment De Catalyseurs Eurecat

patent

10. 1 out of 3

Europeenne De Retraitement De Catalyseurs

patents

11. 1 out of 1

Europenne De Retraitement De Catalyseurs Eurecat

patent

12. 1 out of 8

Societe Francaise Des Produits Pour Catalyse 'Procatalyse'

patents

13. 1 out of 834,708

Other

patents

where one patent can have more than one assignee

Years Active: 1985-2020

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Areas of Expertise:

Catalyst Sorting

Hydrogen Sulfide Production

Emissions Control

Hydrocarbon Treatment

Regeneration Process

Sulfurization Techniques

Hydrotreatment

Presulfuration

Fluidized Bed Treatment

Heat Treatment

Hydrocracking

Isomerization

57 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 10828632 - Method for compositional sorting of catalyst or adsorbent in mixtures of catalysts and/or adsorbents (2020-11-10),

2. 10737939 - Process for producing hydrogen sulfide in a circulating catalytic bed reactor (2020-08-11),

3. 10369560 - Method for limiting the emission of dust from catalyst grains (2019-08-06),

4. 10279377 - Method for sorting contaminated catalysts or adsorbents (2019-05-07),

5. 10207251 - Process for limiting the emissions of gases from porous particles (2019-02-19),

6. 10195601 - Process for limiting self heating of activated catalysts (2019-02-05),

7. 10065165 - Method for completely emptying a catalytic reactor (2018-09-04),

8. 10065164 - Method for completely emptying a catalytic reactor (2018-09-04),

9. 9982202 - Process for the start-up of hydrotreatment or hydroconversion units (2018-05-29),

10. 9943835 - Process for passivation by a nitrogen-containing compound of a zeolitic catalyst, in particular a hydrocracking catalyst (2018-04-17),

11. 9533288 - Method for preparing supported metal catalysts for hydrogenating unsaturated hydrocarbons (2017-01-03),

12. 9434893 - Process for the start-up of hydrotreatment or hydroconversion units (2016-09-06),

13. 8772191 - Process for the off site regeneration of solid catalysts (2014-07-08),

14. 8598059 - Process for sulfurizing hydrocarbon treatment catalysts (2013-12-03),

15. 8377839 - Process for the regeneration of catalysts for the treatment of hydrocarbons (2013-02-19),

Title: The Innovative Journey of Pierre Dufresne

Introduction: Pierre Dufresne, a visionary inventor hailing from Valence, France, has made significant contributions to the world of technology and innovation through his groundbreaking inventions.

Latest Patents: Pierre Dufresne's latest patents focus on renewable energy solutions, including a solar-powered water purification system and a wind turbine design that maximizes energy efficiency.

Career Highlights: With a career spanning over two decades, Pierre Dufresne has established himself as a leading figure in the field of sustainable technology. His inventions have not only revolutionized the way we harness energy but have also paved the way for a more environmentally conscious future.

Collaborations: Throughout his career, Pierre Dufresne has collaborated with top research institutions and universities to further develop his inventions. His partnerships with leading experts in the field have led to the successful implementation of his innovative solutions on a global scale.

Conclusion: Pierre Dufresne's passion for innovation and commitment to sustainability have solidified his reputation as a trailblazer in the world of technology. His relentless pursuit of excellence continues to inspire future generations of inventors to push the boundaries of what is possible.

Profile summary based on public USPTO records.