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For the Inventor, By the Inventor

Wallingford, CT, United States of America

Shenghong A Dai

This inventor holds 19 USPTO granted patents. Top assignees: The Dow Chemical Company, The Upjohn Co.. Active years: 1982-2002.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Shenghong A Dai. Retrieved from https://idiyas.com/inventor/shenghong-a-dai

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

USPTO Granted Patents = 19

% Patents Active = 100.0

Average Co-Inventor Count = 1.4

ph-index = 5

Forward Citations = 85(Granted Patents)


Location History:

  • Wallingford, CT (US) (1982 - 1988)
  • Lake Jackson, TX (US) (1992 - 2002)

Company Filing History:

goldMedal16 out of 7,680 
 
The Dow Chemical Company
 patents
silverMedal3 out of 2,170 
 
The Upjohn Co.
 patents

Years Active: 1982-2002

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19 patents (USPTO):Explore Patents
1. 6429336 - Process for recovering toluene diamine from toluene diisocyanate distillation residues (2002-08-06),
2. 5453536 - Polycarbamates, process for preparing polycarbamates, and process for (1995-09-26),
3. 5208270 - Catalyst systems useful for forming isocyanurate, amide and/or (1993-05-04),
4. 5169878 - Composition and method of preparation of viscosity-stabilized (1992-12-08),
5. 5143945 - Carboxylic acid modified carbon dioxide co-blown (1992-09-01),
6. 4720584 - Nitro substituted diphenyl ethers and derivatives thereof (1988-01-19),
7. 4709004 - Polyesteramide from hydroxy phenyl-isopropyl-amino diphenyl ether (1987-11-24),
8. 4689434 - Nitro substituted diphenyl ethers and derivatives thereof (1987-08-25),
9. 4683302 - Azetidinedione compounds as crosslinkers for electrodeposited coatings (1987-07-28),
10. 4642342 - Azetidinedione urethanes (1987-02-10),
11. 4618727 - Nitro substituted diphenyl ethers (1986-10-21),
12. 4612374 - Tris-azetidinedione derivative 1,3,5-triazin-2,4,6-triones (1986-09-16),
13. 4612098 - Process for electrodeposition using azetidinedione compounds as (1986-09-16),
14. 4604450 - Polymer from azetidine-2,4-dione and polyol or polyamine (1986-08-05),
15. 4576980 - Azetidinedione compounds as crosslinkers for electrodeposited coatings (1986-03-18),

Title: **Innovations of Shenghong A. Dai: A Patent Trailblazer from Wallingford, CT**

Introduction

Shenghong A. Dai is a notable inventor based in Wallingford, Connecticut, with an impressive portfolio of 19 patents. His contributions to the field of chemical engineering, particularly in processes involving toluene diisocyanate and polycarbamates, have significantly advanced industrial applications.

Latest Patents

Dai's latest patents showcase his innovative approaches to recovering valuable chemicals from complex mixtures. One of his key patents details a process for recovering toluene diamine (TDA) from toluene diisocyanate distillation residues. This technique involves hydrolyzing the residues by mixing them with water and subjecting the mixture to a temperature range of 200-350 °C. The hydrolysis is aided by a base to maintain reactor pressure at a predetermined level, allowing nearly quantitative conversion of the residues to TDA that can be recycled. Additionally, he has developed processes related to polycarbamates which focus on their efficient preparation, characterized by their ability to be pyrolyzed under mild conditions with low by-product formation.

Career Highlights

Shenghong A. Dai has had a distinguished career, contributing his expertise to renowned organizations such as The Dow Chemical Company and The Upjohn Company. His work in these companies has provided a platform for the practical application of his inventive processes, leading to advancements in the chemical industry.

Collaborations

Throughout his career, he has collaborated with talented colleagues, including Philip W. Sherwood and Steven J. Grossman. These partnerships have fostered a collaborative environment for innovation and have been instrumental in the development of his patented processes.

Conclusion

Shenghong A. Dai exemplifies the spirit of innovation, with his extensive patent portfolio highlighting his commitment to improving chemical processes. His work not only enhances the efficiency of chemical recovery but also contributes to the sustainable practices in the industry. As an esteemed inventor, his ongoing contributions continue to pave the way for future advancements in chemical engineering.

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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