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Pittsburgh, PA, United States of America

Dravo Lime Company

USPTO Granted Patents = 28

CIPO Patents = 2

Trademarks = 1

Forward Citations = 304

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29 inventors (with patents filed for the assignee):

John W College (13 out of 30 patents)

Lewis B Benson (7 out of 9 patents)

Shiaw C Tseng (5 out of 5 patents)

4. Manyam Babu (4 out of 5 patents)

5. Yungli J Lee (4 out of 4 patents)

6. Donald H Stowe, Jr (3 out of 3 patents)

7. Daniel W Berisko (2 out of 3 patents)

8. Charles J Muzik (2 out of 2 patents)

9. Kenneth L Yoest (2 out of 2 patents)

10. Russell C Forsythe (2 out of 2 patents)

11. Kenneth L Hardee (1 out of 35 patents)

12. Marilyn J Niksa (1 out of 21 patents)

13. Ronald J Rathi (1 out of 2 patents)

14. Edward M Halko (1 out of 4 patents)

15. Lynne M Ernes (1 out of 22 patents)

Core Competencies:

Flue Gas Desulfurization

Sulfur Dioxide Removal

Nitrogen Oxides

Magnesium Hydroxide

Cement Production

Gypsum Formation

Lime Slaking

Acid Soil Amelioration

Wet Scrubbing

Gas Stream Processing

Electrochemical Process

Sodium-Enhanced Scrubbing

28 patents: Sort by Forward Citations

1. 6033577 - Coordination of liquid-solid separators and fluid tanks (2000-03-07),

2. 5846286 - Method for removing NO.sub.x from a gas stream while producing an (1998-12-08),

3. 5827488 - Process for removing SO.sub.2 and NO.sub.x from a gaseous stream (1998-10-27),

4. 5817283 - Method for removing sulfur dioxide and nitrogen oxides from combustion (1998-10-06),

5. 5785841 - Method of removing sulfur dioxide and nitrogen oxides from a gaseous (1998-07-28),

6. 5769940 - Process for producing cement and elemental sulfur from a flue gas (1998-06-23),

7. 5766339 - Process for producing cement from a flue gas desulfurization process (1998-06-16),

8. 5705051 - Electrochemical process (1998-01-06),

9. 5695727 - Process for removing sulfur dioxide and nitrogen oxides from a hot (1997-12-09),

10. 5683666 - Method for the removal of sulfur dioxide and nitrogen oxides for a (1997-11-04),

11. 5645807 - Magnesium-enhanced sulfur dioxide scrubbing with gypsum formation (1997-07-08),

12. 5628811 - Method of ameliorating acid soil to enhance plant growth (1997-05-13),

13. 5614158 - Process for removing sulfur dioxide from gases and producing gypsum and (1997-03-25),

14. 5403568 - Horizontal wet scrubbing apparatus and method for removing sulfur (1995-04-04),

15. 5384111 - Magnesium-enhanced lime scrubbing of sulfur dioxide with production of a (1995-01-24),

Company Overview

Dravo Lime Company, based in Pittsburgh, PA, specializes in the production of high-quality lime and lime-based products. The company serves various industries, including construction, environmental, and chemical manufacturing, providing essential materials for processes such as water treatment and soil stabilization. With a focus on innovation and sustainability, Dravo Lime Company is committed to advancing technologies that enhance the efficiency and effectiveness of lime applications across diverse sectors.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

28 Patents

#85 in Pittsburgh, PA

#438 in Pennsylvania

#12,016 in US

#23,299 in the World

Pittsburgh, PA, United States of America

Dravo Lime Company

Forward Citations = 304

29 inventors:

John W College (13 out of 30 patents)

Lewis B Benson (7 out of 9 patents)

Shiaw C Tseng (5 out of 5 patents)

4. Manyam Babu (4 out of 5 patents)

5. Yungli J Lee (4 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Dravo Lime Company. Retrieved from https://idiyas.com/company/dravo-lime-company

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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