National Slag Limited

Calculating rank

USPTO Granted Patents = 4

Forward Citations = 20

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5 inventors (with patents filed for the assignee):

Peter A MacKenzie (3 out of 4 patents)

David T Horvat (2 out of 3 patents)

Kenneth W Spencer (2 out of 2 patents)

4. Michael Orlander (2 out of 2 patents)

5. Robert P Cotsworth (2 out of 2 patents)

4 patents: Sort by Forward Citations

1. 5082483 - Enclosures for slag pelletization apparatus and method of operation (1992-01-21),

2. 4995894 - Enclosures for slag pelletization apparatus and method of operation (1991-02-26),

3. 4451221 - Apparatus for the pelletization of heat-liquifiable solid materials (1984-05-29),

4. 4414016 - Apparatus for the pelletization of heat-liquifiable solid materials (1983-11-08),

Company Overview

National Slag Limited is a Canadian company that specializes in the processing, marketing, and distribution of by-products from the steel industry. With over 40 years of experience, National Slag Limited has become a leading supplier of slag products for use in construction, agriculture, and road building. Their commitment to quality and sustainability has made them a trusted partner for companies looking for environmentally-friendly solutions.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

4 Patents

#19 in Hamilton

#3,468 in Canada

Hamilton, Canada