Elkem-Spigerverket

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USPTO Granted Patents = 5

Forward Citations = 31

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6 inventors (with patents filed for the assignee):

Harald Krogsrud (2 out of 18 patents)

Fredrik Steineke (1 out of 1 patent)

Bjorn Asphaug (1 out of 1 patent)

4. Thor Pedersen (1 out of 2 patents)

5. William Bruff (1 out of 1 patent)

6. Ole A Kongsgaarden (1 out of 3 patents)

5 patents: Sort by Forward Citations

1. 4005252 - Apparatus for gas collection in open electric smelting furnaces (1977-01-25),

2. 4001488 - Apparatus for feeding charge to an electric smelting furnace (1977-01-04),

3. 3996340 - Method of producing aluminum fluoride (1976-12-07),

4. 3976727 - Venturi gas scrubbers for smelting furnaces (1976-08-24),

5. 3936588 - Control system for electrical furnaces (1976-02-03),

Company Overview

Elkem Spigerverket is a leading supplier of advanced alloying solutions for the global steel industry. With a focus on innovation and sustainability, Elkem Spigerverket offers a wide range of high-quality products and services to help customers improve their performance and reduce environmental impact.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

5 Patents

#101 in Oslo

#329 in Norway

Oslo, Norway