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Boston, MA, United States of America

Stone & Webster Engineering Corp.

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USPTO Granted Patents = 122

Trademarks = 2

Forward Citations = 2,404

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92 inventors (with patents filed for the assignee):

Robert J Gartside (29 out of 72 patents)

Herman N Woebcke (26 out of 28 patents)

Axel R Johnson (20 out of 38 patents)

4. Richard C Norton (9 out of 11 patents)

5. George Garabedian (9 out of 9 patents)

6. Arju H Bhojwani (7 out of 7 patents)

7. Dennis A Duncan (6 out of 6 patents)

8. Joseph L Ross, Jr (6 out of 6 patents)

9. Robert A DeLuca (6 out of 6 patents)

10. Jacob N Rubin (5 out of 6 patents)

11. Mark Whitney (4 out of 5 patents)

12. Robert E Roemer (4 out of 7 patents)

13. Alan R Goelzer (4 out of 4 patents)

14. Maxim Karafian (4 out of 4 patents)

15. Irving C Tsang (4 out of 4 patents)

Core Competencies:

Ethylene Production

Catalytic Cracking

Spent Caustic Treatment

Olefin Recovery

Fluidized Catalytic Cracking

Hydrocarbon Pretreatment

Olefin Production

Chemical Absorption

Synthesis Gas Production

Thermal Cracking

Nuclear Reactor

Process Automation

122 patents: Sort by Forward Citations

1. 6383455 - Ceramic slot reactor for ethylene production (2002-05-07),

2. 6312652 - Ceramic dip pipe and tube reactor for ethylene production (2001-11-06),

3. 6271433 - Cat cracker gas plant process for increased olefins recovery (2001-08-07),

4. 6267359 - Advanced tray support system using orthogonal grillage (2001-07-31),

5. 6235961 - Process for pretreating cracked gas before caustic tower treatment in ehtylene plants (2001-05-22),

6. 6210583 - Spent caustic pretreatment and enhanced oxidation process (2001-04-03),

7. 5981818 - Integrated cracking and olefins derivative process utilizing dilute (1999-11-09),

8. 5976355 - Low residence time catalytic cracking process (1999-11-02),

9. 5939596 - Butadiene removal system for ethylene plants with front end (1999-08-17),

10. 5891346 - Spent caustic system (1999-04-06),

11. 5885422 - Spent caustic (pre)treatment process (1999-03-23),

12. 5859304 - Chemical absorption process for recovering olefins from cracked gases (1999-01-12),

13. 5837129 - Process and apparatus for separating fluidized cracking catalysts from (1998-11-17),

14. 5768913 - Process based mixed refrigerants for ethylene plants (1998-06-23),

15. 5766558 - Fluid catalytic cracking process and apparatus (1998-06-16),

Company Overview

Stone & Webster Engineering Corp., based in Boston, MA, specializes in the field of ethylene production and related technologies. The company focuses on developing advanced processes for catalytic cracking, olefin recovery, and spent caustic treatment, contributing to the efficiency and sustainability of chemical manufacturing. With expertise in hydrocarbon pretreatment and chemical absorption, Stone & Webster plays a significant role in enhancing the production of olefins, essential building blocks in the petrochemical industry.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

122 Patents

#23 in

#3,184 in

#6,577 in the World

Boston, MA, United States of America

Stone & Webster Engineering Corp.

Forward Citations = 2,404

92 inventors:

Robert J Gartside (29 out of 72 patents)

Herman N Woebcke (26 out of 28 patents)

Axel R Johnson (20 out of 38 patents)

4. Richard C Norton (9 out of 11 patents)

5. George Garabedian (9 out of 9 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Stone & Webster Engineering Corp.. Retrieved from https://idiyas.com/company/stone-and-webster-engineering

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

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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