Paul Joseph Gerroir

This inventor holds 59 USPTO granted patents and 7 published patent applications, plus 9 CIPO patents and 7 EPO patents, primarily in Toner Composition Technology (CPC class G03G). Top assignees: Xerox Corporation, National Research Council of Canada. Active years: 1990-2016.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Paul Joseph Gerroir. Retrieved from https://idiyas.com/inventor/paul-joseph-gerroir

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

USPTO Granted Patents = 59 (Patent Applications = 7)

% Patents Active = 79.7

CIPO Patents = 9

EPO Patents = 7 (Patent Applications = 6)

Average Co-Inventor Count = 5.5

ph-index = 12

Forward Citations = 706(Granted Patents)

Forward Citations (Not Self Cited) = 689(Dec 10, 2025)

Inventors with similar research interests:

Location History:

Toronto, CA (1990 - 1994)
Oakvile, CA (2013)
Oakville, CA (1993 - 2016)

Company Filing History:

National Research Council of Canada

patents

where one patent can have more than one assignee

Years Active: 1990-2016

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Areas of Expertise:

Toner Compositions

Emulsion Aggregation

Polymer Surfaces

Chemical Passivation

Fluorinated Films

Low Melt Toners

Pyrophoric Iron Nanoparticles

Spherical Silica

Controlled Chatter Patterning

Carrier Particles

Cross-Linked Polymers

Zinc Stearate Dispersion

59 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 9395637 - Neutralizing agents for resin emulsions (2016-07-19),

2. 9274444 - Neutralizing agents for resin emulsions (2016-03-01),

3. 9051441 - Process for chemical passivation of polymer surfaces (2015-06-09),

4. 8951708 - Method of making toners (2015-02-10),

5. 8828637 - Toner compositions (2014-09-09),

6. 8765340 - Fluorinated structured organic film photoreceptor layers containing fluorinated secondary components (2014-07-01),

7. 8737904 - Delivery apparatus (2014-05-27),

8. 8703377 - Emulsion aggregation toner compositions (2014-04-22),

9. 8691482 - Powder Coated Carrier (2014-04-08),

10. 8673527 - Toner processes (2014-03-18),

11. 8580472 - Rosin-based resin and toner containing same (2013-11-12),

12. 8530131 - Toner compositions (2013-09-10),

13. 8461252 - Powder coated carrier (2013-06-11),

14. 8431303 - Rosin-based resin and toner containing same (2013-04-30),

15. 8308842 - Pyrophoric iron nanoparticles and continuous processes for production thereof (2012-11-13),

Title: Spotlight on Inventor Paul Joseph Gerroir

Introduction:

Paul Joseph Gerroir, a prolific inventor based in Oakville, CA, has made significant contributions to the field of resin emulsions with an impressive portfolio of 59 patents.

Latest Patents:

Among his recent innovations is the development of neutralizing agents for resin emulsions. Through the incorporation of organic amines in phase inversion emulsification processes, Gerroir has successfully emulsified high molecular amorphous and branch amorphous polyester resins, overcoming traditional challenges. These organic amines have enabled the achievement of the desired particle size with a narrow size distribution, revolutionizing the emulsification process.

Career Highlights:

Gerroir has brought his inventive spirit to renowned companies such as Xerox Corporation and the National Research Council of Canada. His expertise and dedication have been instrumental in driving innovation and progress in the industry.

Collaborations:

Throughout his career, Gerroir has collaborated with esteemed professionals in the field, including coworkers Karen Ann Moffat and Ke Zhou. Together, they have worked on cutting-edge projects, pushing the boundaries of possibilities in resin emulsions.

Conclusion:

Inventor Paul Joseph Gerroir's groundbreaking work in resin emulsions underscores his commitment to innovation and problem-solving. With a wealth of patents and a career marked by notable collaborations, Gerroir continues to leave a lasting impact on the industry, shaping the future of emulsification processes.

Profile summary based on public USPTO records.