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Milford, CT, United States of America

Dorr-oliver Incorporated

USPTO Granted Patents = 139

Trademarks = 6

Forward Citations = 1,920

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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

Centrifuge Conveyor

Froth Flotation Machine

Vacuum Filtration

Electrofiltration

Clarifier Tanks

Rotary Drum Filter

Corn Wet Milling Process

Ash Classifier

Microstrainer Filter

High Pressure Screen Shower

Dialyzing Electrofilter

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),

Dorr-Oliver Incorporated specializes in providing high-quality industrial solutions. With a rich history dating back to 1885, we have become a leading global provider of innovative technologies in the mining, minerals, chemical, and environmental industries. Our company offers a wide range of products and services, including specialized equipment, engineering design and consulting, and project management. By leveraging our expertise and experience, we deliver efficient and sustainable solutions to our clients worldwide. Visit our website to learn more about our offerings and how we can help you achieve your business goals.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

139 Patents

#1 in Milford, CT

#66 in Connecticut

#2,702 in US

#5,671 in the World

Milford, CT, United States of America

Dorr-oliver Incorporated

Forward Citations = 1,920

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)

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