% 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),

Company Overview

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 synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

5 Patents

#28 in Chelmsford, MA

#2,894 in Massachusetts

#51,644 in US

Chelmsford, MA, United States of America

Coaltek, Inc.

Forward Citations = 39

11 inventors:

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)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Coaltek, Inc.. Retrieved from https://idiyas.com/company/coaltek

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]

2 patents (EPO):

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]