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Dover, OH, United States of America

Dover Chemical Corporation

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USPTO Granted Patents = 31

% Expired Patents = 35.5

EPO Patents = 3

Trademarks = 13

Forward Citations = 126

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31 inventors (with patents filed for the assignee):

Donald R Stevenson (20 out of 30 patents)

Michael Jakupca (11 out of 15 patents)

Duong N Nguyen (8 out of 8 patents)

4. Jacob M Lance (6 out of 10 patents)

5. Don R Stevenson (4 out of 5 patents)

6. Jacob Weingart (3 out of 3 patents)

7. Thomas Jennings (3 out of 3 patents)

8. Mark E Harr (3 out of 3 patents)

9. Carroll W Larke (3 out of 3 patents)

10. Barbara A Wade (3 out of 3 patents)

11. James G MacNeil (3 out of 3 patents)

12. John Nussbaumer (2 out of 2 patents)

13. Nina Bersaglini (2 out of 2 patents)

14. Satyan Kodali (2 out of 2 patents)

15. Joseph C Fette (2 out of 2 patents)

Core Competencies:

Polymeric Additives

Extreme Pressure Agents

Phosphite Stabilizers

Lubrication Process

Metal Working Additives

Chlorinated Ester

Dimeric Polysulfides

Hydrolytically Stable

Non-Ozone Depleting

Marine-Engine Lubricant

Phenol-Free Phosphites

Pentaerythritol Diphosphites

31 patents: Sort by Forward Citations

1. 11008529 - Polymeric poly-phosphorus additives for: gear oil, grease, engine-oil, combustion-engine lubricant, automatic transmission fluid, anti-wear agents, two-cycle engine lubricant, or marine-engine lubricant (2021-05-18),

2. 10745639 - Polymeric poly-phosphorus lubricant additives for metal working (2020-08-18),

3. 10597945 - Coiled-tubing fluid-lubricant composition and related methods (2020-03-24),

4. 9982112 - Copolymeric polyphosphite polymer stabilizers (2018-05-29),

5. 9963572 - Chlorinated ester polyvinyl-chloride secondary plasticizer and related methods (2018-05-08),

6. 9745425 - Cycloaliphatic polyphosphite (2017-08-29),

7. 9382201 - Light-colored metal working additives (2016-07-05),

8. 8981042 - Cycloaliphatic polyphosphite polymer stabilizers (2015-03-17),

9. 8664171 - Nitrated extreme pressure additives and blends (2014-03-04),

10. 8563637 - Alkylphenol free-liquid polymeric phosphite polymer stabilizers (2013-10-22),

11. 8445567 - Method for reducing plate-out of solid phosphites in polymers (2013-05-21),

12. 8278490 - Phase transfer catalyst for synthesis of pentaerythritol diphosphites (2012-10-02),

13. 8258215 - Mixed alkyl-alkylaryl-phenyl phosphite polymer additive (2012-09-04),

14. 8058317 - Nitrated extreme pressure additives and blends (2011-11-15),

15. 7960323 - Nitrated extreme pressure additives (2011-06-14),

Company Overview

Dover Chemical Corporation, based in Dover, Ohio, specializes in the development and manufacturing of specialty chemicals and additives. The company focuses on providing innovative solutions for various industries, including plastics, coatings, and lubricants. With a commitment to quality and sustainability, Dover Chemical leverages advanced research and technology to enhance product performance and meet the evolving needs of its customers. The organization is dedicated to fostering long-term partnerships and delivering tailored solutions in the chemical sector.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

31 Patents

#2 in Dover, OH

#485 in Ohio

#10,936 in US

#21,284 in the World

Dover, OH, United States of America

Dover Chemical Corporation

Forward Citations = 126

31 inventors:

Donald R Stevenson (20 out of 30 patents)

Michael Jakupca (11 out of 15 patents)

Duong N Nguyen (8 out of 8 patents)

4. Jacob M Lance (6 out of 10 patents)

5. Don R Stevenson (4 out of 5 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Dover Chemical Corporation. Retrieved from https://idiyas.com/company/dover-chemical

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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