Forward Citations = 33

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3 inventors (with patents filed for the assignee):

Walter H Seitzer (3 out of 18 patents)

Jackson S Boyer (1 out of 3 patents)

Keith L Shelstad (1 out of 1 patent)

5 patents: Sort by Forward Citations

1. 4410415 - Reduction in pour point of shale oil (1983-10-18),

2. 4269614 - Apparatus for controlling the dispersion of coal fines into the (1981-05-26),

3. 4192650 - Process for drying and stabilizing coal (1980-03-11),

4. 4166023 - Pour point depressant for shale oil (1979-08-28),

5. 4018682 - Freeze-thaw method for reducing mineral content of a clay-water mixture (1977-04-19),

Company Overview

Sunoco Energy Development Co. is a leading energy company that specializes in the development, production, and distribution of oil and natural gas. With a strong focus on sustainability and innovation, Sunoco is committed to providing reliable and affordable energy solutions to customers around the world.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

5 Patents

#369 in Dallas, TX

#3,330 in Texas

#51,570 in US

Dallas, TX, United States of America

Sunoco Energy Development Co.

Forward Citations = 33

3 inventors:

Walter H Seitzer (3 out of 18 patents)

Jackson S Boyer (1 out of 3 patents)

Keith L Shelstad (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sunoco Energy Development Co.. Retrieved from https://idiyas.com/company/sunoco-energy-development-company

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]