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Cleveland, OH, United States of America

Kennecott Corporation

USPTO Granted Patents = 128

Trademarks = 3

Forward Citations = 2,065

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130 inventors (with patents filed for the assignee):

James H Carpenter (8 out of 39 patents)

Jonathan J Kim (8 out of 20 patents)

Erwin J Nunlist (8 out of 15 patents)

4. George Shinopulos (6 out of 12 patents)

5. Terry F Bower (6 out of 9 patents)

6. M Ronald Randlett (6 out of 9 patents)

7. Richard E Tressler (6 out of 9 patents)

8. Russell D Smith (5 out of 5 patents)

9. Carl H McMurtry (4 out of 21 patents)

10. Viswanathan Venkateswaran (4 out of 7 patents)

11. Paul Cichy (4 out of 7 patents)

12. Laurence N Hailey (4 out of 8 patents)

13. John L Tworek (4 out of 4 patents)

14. Gordon R Rignel (4 out of 4 patents)

15. David B George (3 out of 16 patents)

Core Competencies:

Copper Refining

Hydrometallurgy

Sintering

Silicon Carbide

Ceramic Composites

Refractories

Casting Apparatus

Corrosion Resistance

Electrode Assemblies

Insulation Materials

Thermal Management

Metal Processing

128 patents: Sort by Forward Citations

1. 5449395 - Apparatus and process for the production of fire-refined blister copper (1995-09-12),

2. 5443622 - Hydrometallurgical processing of impurity streams generated during the (1995-08-22),

3. 4761025 - Method and apparatus for distributing the load between sections of a (1988-08-02),

4. 4736789 - Apparatus and method for continuous casting of metallic strands at (1988-04-12),

5. 4711296 - Apparatus for avoiding thermal stresses in glass lined vessels (1987-12-08),

6. 4707583 - Plasma heated sintering furnace (1987-11-17),

7. 4698481 - Method for preventing decomposition of silicon carbide articles during (1987-10-06),

8. 4693988 - Single phase silicon carbide refractory (1987-09-15),

9. 4683938 - Method and apparatus for the continuous production of strip using (1987-08-04),

10. 4683516 - Extended life capacitor and method (1987-07-28),

11. 4678577 - Seamless vessel for self contained filter assembly (1987-07-07),

12. 4676940 - Plasma arc sintering of silicon carbide (1987-06-30),

13. 4666775 - Process for sintering extruded powder shapes (1987-05-19),

14. 4659022 - Production of silicon carbide with automatic separation of a high grade (1987-04-21),

15. 4658346 - Apparatus for co-generation of electric power (1987-04-14),

Kennecott Corporation, headquartered in Cleveland, OH, specializes in copper processing, focusing on advanced techniques such as copper refining and hydrometallurgy. The company is recognized for its expertise in sintering, silicon carbide, and ceramic composites, contributing to the development of innovative refractories and casting apparatus. With a commitment to enhancing corrosion resistance, Kennecott plays a vital role in the materials sector, leveraging its technological capabilities to support various industrial applications.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

Kennecott Corporation

128 Patents

#21 in Cleveland, OH

#141 in Ohio

#3,025 in US

#6,261 in the World

Cleveland, OH, United States of America

Kennecott Corporation

Forward Citations = 2,065

130 inventors:

James H Carpenter (8 out of 39 patents)

Jonathan J Kim (8 out of 20 patents)

Erwin J Nunlist (8 out of 15 patents)

4. George Shinopulos (6 out of 12 patents)

5. Terry F Bower (6 out of 9 patents)

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