Brownsville, MN, United States of America

Stephen Anthony Kujak

This inventor holds 42 USPTO granted patents and 13 published patent applications and 10 EPO patents, primarily in Refrigerant Management. Top assignees: Trane International Inc., Gas Research Institute, Thermo King Corporation. Active years: 1997-2025.

USPTO Granted Patents = 42 (Patent Applications = 13)

% Patents Active = 100.0

EPO Patents = 10 (Patent Applications = 12)

Average Co-Inventor Count = 2.0

ph-index = 5

Forward Citations = 113(Granted Patents)

Location History:

Onalasaka, WI (US) (2020)
Onalaska, MN (US) (2022)
Onalaska, WI (US) (1997 - 2023)
Brownsville, MN (US) (2019 - 2024)

Company Filing History:

36 out of 827

Trane International Inc.

patents

3 out of 645

Gas Research Institute

patents

2 out of 648

Thermo King Corporation

patents

4. 1 out of 214

American Standard International Inc.

patents

Years Active: 1997-2025

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Areas of Expertise:

Refrigerant Recovery

HVAC Systems

Low GWP Refrigerants

Heat Transfer

Refrigerant Compositions

Refrigerant Additives

Leak Detection

Refrigeration Systems

Cascade Heat Transfer

Fluid Additive

Phobic/Philic Structures

Heat Pump

42 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 12467668 - Refrigerant recovery and repurposing (2025-11-11),

2. 12387281 - Systems and methods for grid appliances (2025-08-12),

3. 12092378 - Refrigerant management in HVAC systems (2024-09-17),

4. 11976858 - Refrigerant recovery and repurposing (2024-05-07),

5. 11976234 - Refrigerant additives and compositions (2024-05-07),

6. 11703240 - Retrofitting R410A HVAC products to handle flammable refrigerants (2023-07-18),

7. 11635239 - Refrigeration system with purge and acid filter (2023-04-25),

8. 11615488 - Systems and methods for grid appliances (2023-03-28),

9. 11421924 - Heat transfer circuit with targeted additive supply (2022-08-23),

10. 11351842 - Cascade heat transfer system (2022-06-07),

11. 11231205 - Using heat recovered from heat source to obtain high temperature hot water (2022-01-25),

12. 11220620 - Lower GWP refrigerant compositions (2022-01-11),

13. 11198805 - Refrigerant compositions and methods of use (2021-12-14),

14. 11162722 - Retrofitting R410A HVAC products to handle flammable refrigerants (2021-11-02),

15. 11162720 - Refrigerant recovery and repurposing (2021-11-02),

Title: The Innovative Journey of Stephen Anthony Kujak

Introduction: Stephen Anthony Kujak, a talented inventor hailing from Brownsville, MN, has made significant contributions to the field of innovations with his creative mind and dedication to problem-solving.

Latest Patents: Stephen Anthony Kujak holds several patents in various industries, showcasing his versatility and ingenuity in inventing new solutions to complex challenges.

Career Highlights: Throughout his career, Stephen Anthony Kujak has demonstrated a keen ability to identify gaps in the market and develop groundbreaking inventions to fill those voids. His passion for innovation has led to the creation of revolutionary products that have improved the lives of many.

Collaborations: Stephen Anthony Kujak has collaborated with leading research institutions, universities, and companies to bring his inventions to life. His collaborative spirit and willingness to work with others have been instrumental in the success of his projects.

Conclusion: Stephen Anthony Kujak's journey as an inventor is a testament to his unwavering commitment to pushing the boundaries of what is possible through innovation. His impact on the world of inventions is profound, and his legacy will continue to inspire future generations of inventors.