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Elkem as

USPTO Granted Patents = 86

% Expired Patents = 9.3

CIPO Patents = 5

EPO Patents = 12

Trademarks = 33

Forward Citations = 487

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95 inventors (with patents filed for the assignee):

Harald Krogsrud (10 out of 18 patents)

Knut K Evensen (7 out of 7 patents)

Jan A Aune (6 out of 13 patents)

4. Karl Forwald (5 out of 7 patents)

5. Gunnar Schussler (4 out of 5 patents)

6. Johannes Sandvik (4 out of 4 patents)

7. Harry Morten Rong (3 out of 4 patents)

8. Mohamed Al-Bagoury (3 out of 5 patents)

9. Bjorn Myhre (3 out of 3 patents)

10. Kenneth Friestad (3 out of 5 patents)

11. Kai Johansen (3 out of 7 patents)

12. Eike Herfurth (3 out of 3 patents)

13. Oyvind Sorli (3 out of 3 patents)

14. Torbjorn Roe (2 out of 3 patents)

15. Magne Dastol (2 out of 9 patents)

Core Competencies:

Silicon Dioxide

Aluminium Oxide

Trichlorosilane

Engineering Plastics

Cement Composition

Electrolysis

Silicon Powder

Ceramic Composites

Hydraulic Cement

Electrode Systems

Oil Well Cement

Manganese Oxide

86 patents: Sort by Forward Citations

1. 10011496 - Process for the production of silicon dioxide particles (2018-07-03),

2. 9738540 - Process for the production of aluminium oxide particles (2017-08-22),

3. 9388481 - High strength, oxidation and wear resistant titanium-silicon based alloy (2016-07-12),

4. 9388051 - Method for production of trichlorosilane and silicon for use in the production of trichlorosilane (2016-07-12),

5. 8962537 - Oil well drilling fluids, oil well cement composition and slurry of weighting material (2015-02-24),

6. 8876968 - Cement composition based on calcium aluminate cement (2014-11-04),

7. 8729172 - High performance engineering plastics and additive for use in engineering plastics (2014-05-20),

8. 8668772 - Slurry of manganomanganic oxide particles and method for the production of slurry (2014-03-11),

9. 8585819 - Aqueous slurry of amorphous silica and method for its production (2013-11-19),

10. 8053507 - Highly filled elastomeric resin compositions with added microsilica for processability (2011-11-08),

11. 7931883 - Silicon feedstock for solar cells (2011-04-26),

12. 7901561 - Method for electrolytic production and refining of metals (2011-03-08),

13. 7854783 - Carbothermic aluminum production apparatus, systems and methods (2010-12-21),

14. 7819937 - Use of alumina-carbon agglomerates in the carbothermic production of aluminum (2010-10-26),

15. 7753988 - Use of alumina-carbon agglomerates in the carbothermic production of aluminum (2010-07-13),

Elkem AS, headquartered in Oslo, Norway, is a leading global provider of silicon-based advanced materials. The company specializes in the production of silicon dioxide, aluminium oxide, and trichlorosilane, catering to various industries including construction, electronics, and automotive. Elkem's expertise extends to engineering plastics, cement composition, and ceramic composites, emphasizing innovation in electrolysis and silicon powder technologies. With a commitment to sustainability, Elkem focuses on developing high-performance materials that meet the evolving needs of its customers worldwide.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

86 Patents

#8 in Oslo

#17 in Norway

#8,861 in the World

Elkem as

Forward Citations = 487

95 inventors:

Harald Krogsrud (10 out of 18 patents)

Knut K Evensen (7 out of 7 patents)

Jan A Aune (6 out of 13 patents)

4. Karl Forwald (5 out of 7 patents)

5. Gunnar Schussler (4 out of 5 patents)

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