% Expired Patents = 80.0

EPO Patents = 2

Forward Citations = 39

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11 inventors (with patents filed for the assignee):

Jerry L Weinberg (2 out of 3 patents)

Neil E Ginther (2 out of 3 patents)

Ru T Wang (2 out of 3 patents)

4. Jed A Aten (2 out of 3 patents)

5. Steven L Lawson (2 out of 2 patents)

6. J Michael Drozd (2 out of 19 patents)

7. Michael C Druga (2 out of 2 patents)

8. Frederick Christopher Lang (2 out of 2 patents)

9. Herbie L Bullis (2 out of 2 patents)

10. Jan M Surma (1 out of 1 patent)

11. Robert T Johnston (1 out of 1 patent)

12. James Michael Drozd (7 patents)

5 patents: Sort by Forward Citations

1. 8585788 - Methods and systems for processing solid fuel (2013-11-19),

2. 8585786 - Methods and systems for briquetting solid fuel (2013-11-19),

3. 8579998 - Pre-burning, dry process methodology and systems for enhancing metallurgical solid fuel properties (2013-11-12),

4. 7901473 - Pre-burning, dry process methodology and systems for enhancing solid fuel properties (2011-03-08),

5. 4270762 - Disperser seal and method (1981-06-02),

Coaltek, Inc. is a leading provider of innovative coal processing solutions. With cutting-edge technology and extensive industry expertise, we offer a range of services including coal sampling, testing, and analysis, as well as coal blending and optimization. Our goal is to help coal producers maximize their operational efficiency and achieve higher quality end products. Visit our website to learn more about our comprehensive range of services and solutions.

Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

5 Patents

#28 in Chelmsford, MA

#2,890 in Massachusetts

#51,545 in US

Chelmsford, MA, United States of America

Coaltek, Inc.