For the Inventor, By the Inventor

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Elgin, IL, United States of America

Safety Kleen Corporation

USPTO Granted Patents = 31

CIPO Patents = 4

Trademarks = 17

Forward Citations = 381

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25 inventors (with patents filed for the assignee):

Douglas A Larson (7 out of 14 patents)

John P Kusz (6 out of 8 patents)

Thomas J Danowski (6 out of 8 patents)

4. Karl G Otzen (6 out of 8 patents)

5. John C Justice (3 out of 3 patents)

6. Frank A Osmanski (3 out of 3 patents)

7. Roy N Voss (2 out of 7 patents)

8. John A Dingess (2 out of 4 patents)

9. William L Jacoby, Jr (2 out of 2 patents)

10. Michael R Dvorak (2 out of 2 patents)

11. Esfandiar Kiany (2 out of 2 patents)

12. René G Laude (1 out of 4 patents)

13. Nick Iliadis (1 out of 2 patents)

14. Boris Goltsin (1 out of 6 patents)

15. Oskar Franz (1 out of 1 patent)

31 patents: Sort by Forward Citations

1. 6004434 - Method of recycling cleaning solvent (1999-12-21),

2. 5955410 - Cleaning compositions and methods (1999-09-21),

3. 5776881 - Enhanced solvent composition (1998-07-07),

4. 5720308 - Parts washer with solvent flow control (1998-02-24),

5. 5710373 - Visual comparator with test chart and method for evaluating (1998-01-20),

6. 5698774 - Apparatus and method for determining concentrations of oil or other (1997-12-16),

7. 5598861 - Parts washer with solvent flow control (1997-02-04),

8. 5582743 - Composite liquid filter (1996-12-10),

9. 5478465 - Composite liquid filter (1995-12-26),

10. 5445038 - Apparatus for sampling fluids in containers (1995-08-29),

11. 5435458 - Chemical spill containment apparatus (1995-07-25),

12. 5353951 - Serviceable storage and transport container (1994-10-11),

13. 5350079 - Safety cover assembly for open container (1994-09-27),

14. 5334291 - On-site, controlled waste concentrator and solvent regenerator apparatus (1994-08-02),

15. 5318056 - Solvent recirculating type spray gun cleaner (1994-06-07),

Safety-Kleen Corporation provides environmental services, oil re-refining and recycling solutions, as well as industrial cleaning products. They offer a wide range of sustainable solutions to businesses across various industries, helping them manage their waste, recover valuable resources, and ensure compliance with environmental regulations. For over 50 years, Safety-Kleen has been committed to protecting the environment and the well-being of their customers while delivering quality products and services.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

31 Patents

#7 in Elgin, IL

#566 in Illinois

#10,562 in US

#20,639 in the World

Elgin, IL, United States of America

Safety Kleen Corporation

Forward Citations = 381

25 inventors:

Douglas A Larson (7 out of 14 patents)

John P Kusz (6 out of 8 patents)

Thomas J Danowski (6 out of 8 patents)

4. Karl G Otzen (6 out of 8 patents)

5. John C Justice (3 out of 3 patents)

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