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Pittsburgh, PA, United States of America

Koppers Company, Inc.

USPTO Granted Patents = 297

Trademarks = 9

Forward Citations = 3,085

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213 inventors (with patents filed for the assignee):

Gerd Leston (23 out of 23 patents)

Nicholas P Greco (14 out of 14 patents)

Hans Dressler (10 out of 14 patents)

4. William T Gormley (7 out of 7 patents)

5. William E Wallace (7 out of 7 patents)

6. Michael M Calistrat (6 out of 6 patents)

7. George R Cain (6 out of 7 patents)

8. Glenn F Hyde (5 out of 10 patents)

9. John Wright (5 out of 5 patents)

10. Carl G Lindgren (5 out of 5 patents)

11. Gordon L Morgret (5 out of 5 patents)

12. Philip H Harju (5 out of 5 patents)

13. Stanley R Prew (5 out of 6 patents)

14. John D Carlson (4 out of 17 patents)

15. Eugene A Pasek (4 out of 18 patents)

Core Competencies:

Phenolic Foam

Hydrogen Storage Materials

Wood Impregnation

Arsenic Acid

Biocides

Coke Oven Emissions

Zirconium Alloys

Fluid-Bed Catalysts

Tar Acid Refining

Resorcinol Derivatives

High Pressure Synthesis

Novel Compositions

297 patents: Sort by Forward Citations

1. 4769230 - Process for preparation of arsenic acid (1988-09-06),

2. 4742663 - Concealed load distribution means for wooden beams (1988-05-10),

3. 4732320 - Railroad grade crossing with transverse securing splines (1988-03-22),

4. 4705879 - Long-chain alkylresorcinol phosphites (1987-11-10),

5. 4679658 - Gaff (1987-07-14),

6. 4679362 - Void plug lift insert assembly for a cast concrete product (1987-07-14),

7. 4663143 - Hydrogen storage materials of CeNi.sub.5-x Mn.sub.x alloys (1987-05-05),

8. 4661378 - Pavement dressing conditioner formed of tar, an aromatic solvent and a (1987-04-28),

9. 4656302 - Tris-(3-hydroxy-4,6-di-t-alkylphenyl) phosphites (1987-04-07),

10. 4656023 - Hyperstoichiometric zirconium-titanium-chromium iron alloys (1987-04-07),

11. 4645780 - Novel biocides employing resorcinol derivatives (1987-02-24),

12. 4642393 - Process for preparing 1,4-dihydroxy, 5,8-dihydronaphthalene and related (1987-02-10),

13. 4633022 - Process for preparation of trisubstituted phenols (1986-12-30),

14. 4619761 - Method for screening or fractionation (1986-10-28),

15. 4608408 - Phenol-HCHO-resorcinol resins for use in forming fast curing wood (1986-08-26),

Company Overview

Koppers Company, Inc., headquartered in Pittsburgh, PA, specializes in the development and manufacturing of advanced phenolic compounds. The company focuses on innovative solutions in various technology domains, including phenolic foam, hydrogen storage materials, and wood impregnation. Koppers also addresses environmental challenges through its work on biocides and coke oven emissions. With a commitment to enhancing material performance, the organization plays a vital role in industries such as construction, energy, and chemical manufacturing.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

297 Patents

#14 in Pittsburgh, PA

#63 in Pennsylvania

#1,481 in US

#3,012 in the World

Pittsburgh, PA, United States of America

Koppers Company, Inc.

Forward Citations = 3,085

213 inventors:

Gerd Leston (23 out of 23 patents)

Nicholas P Greco (14 out of 14 patents)

Hans Dressler (10 out of 14 patents)

4. William T Gormley (7 out of 7 patents)

5. William E Wallace (7 out of 7 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Koppers Company, Inc.. Retrieved from https://idiyas.com/company/koppers-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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