Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5411572 | Method for utilizing smelter waste containing zinc and other valuable metals | Maija-Leena Metsarinta | 1995-05-02 |
| 4946811 | Method for mixing molten iron silicate with ferroalloy slag in order to produce fire-resistant and chemically resistant fiber | Aarno T. Salervo | 1990-08-07 |
| 4818290 | Method for utilizing slag from ferroalloy production | — | 1989-04-04 |
| 4740239 | Process for exploitation of low grade oxidic and iron-bearing complex ores or concentrates | Seppo Heimala, Stig-Erik Hultholm, Risto J. Honkala, Helge Krogerus, Matti E. Honkaniemi | 1988-04-26 |
| 4650510 | Method and apparatus for manufacturing heat-resistant and/or fire-resistant fibre materials | — | 1987-03-17 |
| 4469493 | Method and apparatus for the purification of gases which contain solid and gaseous impurities | Kalervo Lehtola | 1984-09-04 |
| 4464764 | Device for moving solid material fed onto the surface of a melt and for breaking a slag crust formed on the surface of the melt or inside the charge | Bengt F. Norrman, Risto M. Heikkila, Matti E. Honkaniemi | 1984-08-07 |
| 4458352 | Method and device providing mobility to a contact shoe independent of an electrode in an electric-arc furnace | Risto M. Heikkila, Martti Jankkila, Bengt J. F. Norrman, Matti E. Honkaniemi | 1984-07-03 |
| 4443878 | Method of mixing a hot furnace gas with another gas before the removal of the furnace gas from the furnace and a hood therefore | Bengt J. F. Norrman, Risto M. Heikkila | 1984-04-17 |
| 4424959 | Brickwork construction | Pentti O. Hokkanen, Aimo Nurminen, Lauri A. Mustikka, Matti Virta | 1984-01-10 |
| 4393029 | Process for the production of an iron-free chronium (III) compound | Seppo Heimala, Stig-Erik Hultholm | 1983-07-12 |
| 4313849 | Process for the production of activated carbon from a moist organic substance | Risto J. Honkala, Maija-Leena Metsarinta | 1982-02-02 |
| 4304596 | Process for a sulfidizing pretreatment of the slag of pyrometallurgical processes in order to facilitate its further treatment | Simo A. I. Makipirtti | 1981-12-08 |
| 4284665 | Process for coating an electrically nonconductive material with metal | Seppo Heimala | 1981-08-18 |
| 4222786 | Ferrochromium slag for uses requiring refractoriness and mechanical strength | Matti E. Honkaniemi, Matias Virta, Helge Krogerus | 1980-09-16 |
| 4211553 | Method of refining of melts by means of a pulverous solid material and/or a gas | Matti E. Honkaniemi, Helge Krogerus, Launo L. Lilja, Juho K. Makinen, John Henrik Relander | 1980-07-08 |