Singapore, Singapore

Stephen Ross Maddux

This inventor holds 2 USPTO granted patents and 2 published patent applications. Top assignee: Halliburton Energy Services, Inc.. Active years: 2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Stephen Ross Maddux. Retrieved from https://idiyas.com/inventor/stephen-ross-maddux-369l8hip

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Calculating rank
USPTO Granted Patents = 2 

% Patents Active = 100.0

Average Co-Inventor Count = 3.7

ph-index = 1


Company Filing History:


Years Active: 2025

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2 patents (USPTO):Explore Patents

Title: Innovations by Stephen Ross Maddux

Introduction

Stephen Ross Maddux is a notable inventor based in Singapore, SG. He has made significant contributions to the field of engineering, particularly in the oil and gas industry. With a total of 2 patents to his name, Maddux has demonstrated his expertise and innovative spirit.

Latest Patents

Maddux's latest patents include an "Expandable liner hanger assembly having anchor key in dovetail groove on hanger body." This invention features a liner hanger body with a radially expandable tubular and a groove designed to extend circumferentially around the body. The assembly includes at least one anchor key that engages a casing string upon expansion, providing a reliable anchoring solution. Another notable patent is the "Expansion tool with a hybrid cone for expansion of an expandable liner hanger in a wellbore." This system comprises an expandable liner hanger and an innovative expansion tool that utilizes a hybrid cone, which combines a solid cone and a collapsible cone to facilitate the expansion process.

Career Highlights

Stephen Ross Maddux is currently employed at Halliburton Energy Services, Inc., a leading company in the energy sector. His work focuses on developing advanced technologies that enhance the efficiency and safety of oil and gas extraction processes.

Collaborations

Maddux has collaborated with talented professionals in his field, including Shengjun Yin and Chee Sing Kelvin Loh. These partnerships have contributed to the successful development of his innovative solutions.

Conclusion

Stephen Ross Maddux is a distinguished inventor whose work has significantly impacted the oil and gas industry. His patents reflect his commitment to innovation and engineering excellence.

Profile summary based on public USPTO records.
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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