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Stamford, CT, United States of America

Dorr-Oliver Incorporated

USPTO Granted Patents = 139

Trademarks = 3

Forward Citations = 1,951

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128 inventors (with patents filed for the assignee):

Walfred Wilhelm Jukkola (12 out of 12 patents)

Peter R Klinkowski (10 out of 10 patents)

Mark P Freeman (6 out of 6 patents)

4. Joseph B Culkin (6 out of 8 patents)

5. Peter Kos (5 out of 9 patents)

6. Kenneth Dan Lewis (5 out of 5 patents)

7. Kurt E Pietzsch (4 out of 4 patents)

8. Chie-Ying Lee (4 out of 4 patents)

9. Stanley A Bunk (4 out of 5 patents)

10. Andrew Beaumont Steever (4 out of 4 patents)

11. Charles Arthur Willus (4 out of 4 patents)

12. Vaino J Kosonen (4 out of 4 patents)

13. Elliot B Fitch (4 out of 4 patents)

14. Albert M Leon (4 out of 5 patents)

15. Peter J Hubbard (3 out of 4 patents)

Core Competencies:

Fluidized Bed Reactor

Filtration

Flotation

Centrifuge

Separation

Electrofiltration

Vacuum Filter

Starch Production

Decontamination

Coal Feed System

Boilers

Enzyme Preparation

139 patents: Sort by Forward Citations

1. 5879638 - Fluidized bed reactor with gas distributor (1999-03-09),

2. 5876679 - Fluid bed reactor (1999-03-02),

3. 5779989 - Fluidized bed reactor with gas distributor and baffle (1998-07-14),

4. 5494227 - High pressure screen shower (1996-02-27),

5. 5470472 - Rotary drum filter with reciprocating nozzle means (1995-11-28),

6. 5441406 - Firing liquid and gaseous fuels for a circulating fluidizing bed reactor (1995-08-15),

7. 5429581 - Wear-resistant tile surfacing for a centrifuge conveyor (1995-07-04),

8. 5389249 - Clarifier with rotating sealed cover (1995-02-14),

9. 5368731 - Vacuum assisted slaker classifier (1994-11-29),

10. 5364335 - Disc-decanter centrifuge (1994-11-15),

11. 5326471 - Microstrainer filter deck panel (1994-07-05),

12. 5300233 - Process of displacement washing in a centrifuge filter (1994-04-05),

13. 5300014 - Underflow control for nozzle centrifuges (1994-04-05),

14. 5284249 - Direct hydraulic drive for large flotation cells (1994-02-08),

15. 5282575 - High pressure screen shower (1994-02-01),

Company Overview

Dorr-Oliver Incorporated, based in Stamford, CT, specializes in fluidized bed technology, focusing on innovative solutions for various industrial applications. The company develops and manufactures advanced systems such as fluidized bed reactors, filtration units, and separation technologies, which are integral in processes like flotation and starch production. With a commitment to enhancing efficiency and sustainability, Dorr-Oliver plays a significant role in optimizing operations across multiple sectors, including chemical processing and environmental management.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

139 Patents

#12 in Stamford, CT

#80 in Connecticut

#2,803 in US

#5,829 in the World

Stamford, CT, United States of America

Dorr-Oliver Incorporated

Forward Citations = 1,951

128 inventors:

Walfred Wilhelm Jukkola (12 out of 12 patents)

Peter R Klinkowski (10 out of 10 patents)

Mark P Freeman (6 out of 6 patents)

4. Joseph B Culkin (6 out of 8 patents)

5. Peter Kos (5 out of 9 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Dorr-Oliver Incorporated. Retrieved from https://idiyas.com/company/dorr-oliver

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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