Wantage, United Kingdom

John Henry Smythe

This inventor holds 3 USPTO granted patents and 1 published patent application. Top assignees: Exxon Chemical Patents, Inc., Infineum International Limited. Active years: 1999-2019.

IDiyas Innovation Intelligence. (2026). Inventor Profile: John Henry Smythe. Retrieved from https://idiyas.com/inventor/john-henry-smythe

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

Calculating rank
USPTO Granted Patents = 3 

% Patents Active = 100.0

Average Co-Inventor Count = 1.3

ph-index = 2

Forward Citations = 7(Granted Patents)


Location History:

  • Oxford, GB (1999)
  • Wantage, GB (2003 - 2019)

Company Filing History:


Years Active: 1999-2019

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3 patents (USPTO):Explore Patents

Title: John Henry Smythe: Innovator in Marine Engine Lubrication

Introduction

John Henry Smythe is a notable inventor based in Wantage, GB. He has made significant contributions to the field of marine engine lubrication, holding a total of 3 patents. His innovative work has had a lasting impact on the industry.

Latest Patents

Smythe's latest patents include advancements in marine engine lubrication. One of his notable inventions is a composition for trunk piston marine engine crackcase lubrication. This composition is made by blending minor amounts of a metal dithiophosphoric acid salt additive, which comprises 50 mole % or more of a zinc di (Cprimary alkyl) dithiophosphate, with an overbased metal detergent additive and a major amount of an oil of lubricating viscosity. Another significant patent is for a two-cycle lubricating oil, which consists of a polybutene polymer, solvent, and mineral oil that passes the JASO engine test for gasoline-fueled two-cycle engines.

Career Highlights

Throughout his career, Smythe has worked with prominent companies in the chemical industry, including Exxon Chemical Patents, Inc. and Infineum International Limited. His work has contributed to the development of innovative lubrication solutions that enhance engine performance and efficiency.

Collaborations

Smythe has collaborated with several notable individuals in his field, including George Mortimer Tiffany, III and George Conrad L'Heureux. These collaborations have further enriched his contributions to marine engine technology.

Conclusion

John Henry Smythe's innovative patents and career achievements highlight his significant role in advancing marine engine lubrication technology. His work continues to influence the industry and inspire future innovations.

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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