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For the Inventor, By the Inventor

Elgin, IL, United States of America

Safety Kleen Corporation


USPTO Granted Patents = 31


Trademarks = 16

Forward Citations = 386

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25 inventors (with patents filed for the assignee):

goldMedal Douglas A Larson (7 out of 14 patents)

silverMedal John P Kusz (6 out of 8 patents)

bronzeMedal 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)


Core Competencies:
Recycling
Cleaning Compositions
Solvent Composition
Parts Washer
Visual Comparator
Fluid Sampling
Chemical Containment
Storage Container
Solvent Regenerator
Spray Gun Cleaner
Degreasing
Immersion Cleaner

31 patents:

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 specializes in environmental services, focusing on waste management and industrial cleaning solutions. The company provides a range of services including parts cleaning, used oil recycling, and hazardous waste disposal, catering primarily to the automotive, manufacturing, and industrial sectors. With a commitment to sustainability, Safety Kleen employs advanced technologies to ensure compliance with environmental regulations while promoting resource recovery and waste minimization across its operations in the United States.
Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

Safety Kleen Corporation
31 Patents

#8 in Elgin, IL

#587 in Illinois

#10,912 in US

#21,217 in the World

Elgin, IL (US)
Elgin, IL, United States of America

Safety Kleen Corporation

Forward Citations = 386

25 inventors:

goldMedal Douglas A Larson (7 out of 14 patents)

silverMedal John P Kusz (6 out of 8 patents)

bronzeMedal 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)

Please report any incorrect information to [email protected]
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