For the Inventor, By the Inventor

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Niagara Falls, NY, United States of America

Sevenson Environmental Services, Inc.

USPTO Granted Patents = 14

% Expired Patents = 7.1

Forward Citations = 118

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10 inventors (with patents filed for the assignee):

Karl William Yost (11 out of 23 patents)

Dhiraj Pal (10 out of 11 patents)

Steven A Chisick (5 out of 5 patents)

4. Michael C Elia (2 out of 2 patents)

5. Wayne Arthur Kostuk (2 out of 2 patents)

6. Timothy M Donegan (1 out of 1 patent)

7. Michael D Crystal (1 out of 1 patent)

8. Russell W Harris (1 out of 2 patents)

9. Mason G Wheeler, Jr (1 out of 2 patents)

10. Steven C Shaw (1 out of 1 patent)

14 patents: Sort by Forward Citations

1. 12311418 - System for the controlled distribution of aquatic capping material and the capture of dust and particulates (2025-05-27),

2. 9162263 - Barge system for hydraulic spreading of aquatic capping material (2015-10-20),

3. 6635796 - Reduction of leachability and solubility of radionuclides and radioactive substances in contaminated soils and materials (2003-10-21),

4. 6357969 - Method of fabricating a groundwater monitoring system and a monitoring system formed using said method (2002-03-19),

5. 6309337 - Method of forming an insoluble phosphate mineral species (2001-10-30),

6. 6291736 - Reduction of leachability and solubility of radionuclides and radioactive substances in contaminated soils and materials (2001-09-18),

7. 6258018 - Fixation and stabilization of metals in contaminated soils and materials (2001-07-10),

8. 6139485 - Fixation and stabilization of metals in contaminated soils and materials (2000-10-31),

9. 5994608 - Reduction of leachability and solubility of radionuclides and (1999-11-30),

10. 5916123 - Fixation and stabilization of metals in contaminated soils and materials (1999-06-29),

11. 5732367 - Reduction of leachability and solubility of radionuclides and (1998-03-24),

12. 5569155 - Fixation and stabilization of metals in contaminated materials (1996-10-29),

13. 5527982 - Fixation and stabilization of metals in contaminated materials (1996-06-18),

14. 5397478 - Fixation and stabilization of chromium in contaminated materials (1995-03-14),

Sevenson Environmental Services, Inc. is a leading provider of environmental remediation services, specializing in the assessment and cleanup of contaminated sites. With a focus on innovative technologies and sustainable practices, the company addresses complex environmental challenges across various sectors. Headquartered in Niagara Falls, NY, Sevenson is committed to delivering effective solutions that protect public health and the environment, leveraging expertise in soil and groundwater remediation, waste management, and site restoration.

Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Oct 6 2026

14 Patents

#5 in Niagara Falls, NY

#1,296 in New York

#1,066 in US

#42,199 in the World

Niagara Falls, NY, United States of America

Sevenson Environmental Services, Inc.

Forward Citations = 118

10 inventors:

Karl William Yost (11 out of 23 patents)

Dhiraj Pal (10 out of 11 patents)

Steven A Chisick (5 out of 5 patents)

4. Michael C Elia (2 out of 2 patents)

5. Wayne Arthur Kostuk (2 out of 2 patents)

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