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For the Inventor, By the Inventor

Elgin, IL, United States of America

Safety Kleen Corporation

Calculating rank
USPTO Granted Patents = 31


Trademarks = 16

Forward Citations = 387

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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),
Company Overview
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 synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

Safety Kleen Corporation USPTO Patent Assignee Logo
31 Patents

#8 in Elgin, IL

#589 in Illinois

#10,946 in US

#21,301 in the World

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

Safety Kleen Corporation

Forward Citations = 387

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)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Safety Kleen Corporation. Retrieved from https://idiyas.com/company/safety-kleen

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

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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