Stephen John Brown

This inventor holds 46 USPTO granted patents and 12 published patent applications, plus 33 CIPO patents and 13 EPO patents, primarily in Polyolefin Polymerization. Top assignee: Nova Chemicals (International) S.a.. Active years: 1996-2026.

USPTO Granted Patents = 46 (Patent Applications = 12)

% Patents Active = 100.0

CIPO Patents = 33 (Patent Applications = 10)

EPO Patents = 13 (Patent Applications = 24)

Average Co-Inventor Count = 3.7

ph-index = 14

Forward Citations = 758(Granted Patents)

Location History:

Elginburg, CA (1996)
Calgary, CA (2000 - 2023)

Company Filing History:

46 out of 477

Nova Chemicals (International) S.a.

patents

Years Active: 1996-2026

Loading Chart...

Areas of Expertise:

Ethylene Copolymer

Polyolefin

Catalyst Systems

Solution Polymerization

Dual Reactor Process

Melt Flow

Oligomerization

Heat Management

Biaxial Orientation

Elastomer

Catalyst Activation

46 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 12624137 - Ethylene interpolymer products having a melt flow-intrinsic viscosity index () (2026-05-12),

2. 12612513 - Ethylene interpolymer products having unique melt flow-intrinsic viscosity (MFIVI) and low unsaturation (2026-04-28),

3. 12486345 - Ethylene copolymer for biaxial orientation (2025-12-02),

4. 12428547 - Ethylene interpolymer products having unique melt flow-intrinsic viscosity (MFIVI) and high unsaturation (2025-09-30),

5. 12281191 - Devolatilization of plastomer pellets (2025-04-21),

6. 11548837 - Self cleaning reactor system (2023-01-10),

7. 11186655 - Off-line filter free Ziegler-Natta catalyst preparation (2021-11-30),

8. 11066493 - Catalyst injection system for an olefin polymerization reactor (2021-07-20),

9. 10975170 - Solution polymerization process (2021-04-13),

10. 10844144 - Non adiabatic 2-phase (liquid-liquid) polymerization process (2020-11-24),

11. 10675605 - Optimized agitator system for production of polyolefin (2020-06-09),

12. 10538654 - Multi reactor solution polymerization, polyethylene and polyethylene film (2020-01-21),

13. 10343152 - Continuous ethylene oligomerization with in-situ catalyst preparation (2019-07-09),

14. 10160696 - Heat management in ethylene oligomerization (2018-12-25),

15. 10093780 - Shrink film from single site catalyzed polyethylene (2018-10-09),

Title: Stephen John Brown: Innovator in Chemical Engineering

Introduction

Stephen John Brown, based in Calgary, Canada, is a prolific inventor with an impressive portfolio of 41 patents to his name. His work primarily focuses on advancements in chemical engineering, particularly in the area of polymerization processes.

Latest Patents

Among his latest patents is the "Self Cleaning Reactor System," which presents a novel approach to the oligomerization of ethylene. This innovative reactor design incorporates a mass of inert, particulate cleaning bodies that are stirred by the liquid flow within the reactor. This unique feature effectively scours the internal surfaces during operation, significantly reducing fouling caused by polyethylene buildup. Additionally, the invention ensures that while foulant material is continuously removed from the process, the cleaning bodies remain within the reactor to maintain efficiency.

Another noteworthy patent is the "Off-line Filter Free Ziegler-Natta Catalyst Preparation." This patent details the development of a magnesium titanium polymerization procatalyst and outlines various methods for its fabrication and use. This invention holds promise for enhancing the efficiency and effectiveness of chemical processes in industrial applications.

Career Highlights

Stephen John Brown is currently associated with Nova Chemicals, a leading international company in the chemicals sector. His contributions to the field of chemical engineering through both research and practical applications have positioned him as a significant figure in innovative developments in the industry.

Collaborations

Throughout his career, Brown has collaborated with many talented individuals, including his coworkers Qinyan Wang and Rupert Edward von Haken Spence. These partnerships have fostered an environment of creativity and teamwork, leading to advancements in chemical processes and the patenting of innovative technologies.

Conclusion

Stephen John Brown stands out not only for his numerous patents but also for his commitment to innovation in chemical engineering. His contributions, especially in reactor design and catalyst preparation, continue to influence the industry significantly. As he continues to develop new solutions, his work serves as an inspiration for future inventors and engineers in the field.