Chester, United Kingdom

Roger Francis Cracknell

This inventor holds 13 USPTO granted patents and 5 published patent applications, plus 1 CIPO patent and 11 EPO patents. Top assignees: Shell Oil Comapny, Shell USA, Inc.. Active years: 2007-2024.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Roger Francis Cracknell. Retrieved from https://idiyas.com/inventor/roger-francis-cracknell

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

USPTO Granted Patents = 13 

% Patents Active = 61.5

 

 

Average Co-Inventor Count = 2.3

ph-index = 3

Forward Citations = 21(Granted Patents)


Location History:

  • Chester, GB (2007 - 2016)
  • Manchester, GB (2021 - 2022)
  • London, GB (2024)

Company Filing History:


Years Active: 2007-2024

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13 patents (USPTO):Explore Patents

Title: The Innovative Contributions of Roger Francis Cracknell

Introduction

Roger Francis Cracknell is a notable inventor based in Chester, GB, recognized for his significant contributions to the field of internal combustion engines. With a total of 13 patents to his name, Cracknell has developed innovative methods aimed at improving engine performance and reducing wear.

Latest Patents

Among his latest patents is a method for reducing intake valve deposits in spark ignition internal combustion engines. This method involves introducing an aqueous-based composition into the engine, which includes water, a freezing point suppression agent, a surfactant, and an amine compound. Another significant patent focuses on the use of a liquid fuel composition that contains a nitrogen-containing detergent additive. This composition is designed to reduce engine wear caused by soot in the lubricating composition, thereby enhancing the longevity and efficiency of the engine.

Career Highlights

Throughout his career, Roger Cracknell has worked with prominent companies in the industry, including Shell Oil Company and Shell USA, Inc. His work has been instrumental in advancing technologies that address common challenges faced by internal combustion engines.

Collaborations

Cracknell has collaborated with several professionals in his field, including Mark Lawrence Brewer and Tor Kit Goh. These collaborations have contributed to the development of innovative solutions in engine technology.

Conclusion

Roger Francis Cracknell's contributions to engine technology through his patents and collaborations highlight his role as a key innovator in the field. His work continues to influence advancements in internal combustion engine performance and efficiency.

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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