James H Ewen, Jr

This inventor holds 6 USPTO granted patents. Top assignees: The Upjohn Co., The Dow Chemical Company. Active years: 1977-1987.

IDiyas Innovation Intelligence. (2026). Inventor Profile: James H Ewen, Jr. Retrieved from https://idiyas.com/inventor/james-h-ewen-jr

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

USPTO Granted Patents = 6

% Patents Active = 100.0

Average Co-Inventor Count = 2.7

ph-index = 5

Forward Citations = 183(Granted Patents)

Location History:

New Haven, CT (US) (1977)
Seabrook, TX (US) (1978 - 1987)

Company Filing History:

The Dow Chemical Company

patents

Years Active: 1977-1987

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6 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 4667009 - Polymethylene polyphenylamine modified diamine chain extenders in (1987-05-19),

2. 4374210 - Polyurea-polyurethane from a mixture of a polyol, an aromatic diamine, (1983-02-15),

3. 4296212 - Elastomeric polyurethane-polyurea polymer prepared from an organic (1981-10-20),

4. 4126742 - High-modulus polyisocyanurate elastomers (1978-11-21),

5. 4126741 - High-modulus polyisocyanurate elastomers (1978-11-21),

6. 4055548 - Storage-stable liquid polyisocyanate composition (1977-10-25),

Title: Innovations of James H Ewen, Jr.

Introduction

James H Ewen, Jr. is a notable inventor based in Seabrook, TX (US), recognized for his contributions to the field of polymer chemistry. He holds a total of six patents, showcasing his innovative approach to developing advanced materials.

Latest Patents

Ewen's latest patents include significant advancements in reaction injection molded polyurea elastomers. One of his key inventions involves polymethylene polyphenylamine modified diamine chain extenders. This invention allows for the retention of desirable physical properties while reducing costs in the preparation of polyureas. Another notable patent focuses on the use of prepolymers of 4,4'-methylenebis(phenyl isocyanate) in the preparation of polyurethane-polyureas. This method enhances gel time and improves the efficiency of mixing components, leading to increased output.

Career Highlights

Throughout his career, Ewen has worked with prominent companies such as The Upjohn Company and The Dow Chemical Company. His experience in these organizations has contributed to his expertise in polymer science and innovation.

Collaborations

Ewen has collaborated with notable colleagues, including Peter S Carleton and Harold E Reymore, Jr. These partnerships have likely fostered a creative environment that has led to significant advancements in their respective fields.

Conclusion

James H Ewen, Jr. is a distinguished inventor whose work in polymer chemistry has led to innovative solutions in material science. His patents reflect a commitment to enhancing the efficiency and cost-effectiveness of polymer production.

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]