| Jun 1917 |
Established "Konoshima Sulfuric Acid
Manufacturing Factory" in |
|
Okayama,Japan (Forerunner of Konoshima Artifical
Fertilizer Co.) |
|
Started manufacture of Sulfuric Acid and
Ferilizer |
| Mar 1946 |
Konoshima Chemical Co., Ltd. was established
by merger of konoshima |
|
Artifical Fertilizer Co. and (old) Konoshima
Chemical Co.,Ltd. |
|
|
| Oct. 1949 |
Started manufacture of Magnesium Carbonate. |
|
|
| Mar 1957 |
Started manufacture of Magnesium Oxide. |
|
|
| Dec. 1960 |
Started manufacture of Calcium Silicate Heat
Insulation. |
|
|
| Nov. 1961 |
Started manufacture of Calcium Carbonate. |
|
|
| Apr. 1972 |
Started manufacture of Nonflammable Building
Material, Calcium Silicate |
|
Board |
| Nov. 1976 |
Started manufacture of Nonflammable Building
Material, Calcium Silicate |
|
Siding Board |
| Nov. 1977 |
Increased Capital to 360,000,000yen |
|
|
| Oct. 1981 |
Started manufacture of High Purity Magnesium
Oxide. |
|
|
| Jun. 1984 |
Started manufacture of Calcium Silicate Siding
by Extrusion process. |
|
|
| Feb 1988 |
Started manufacture of Nonflammable Fittings. |
|
|
| Oct. 1988 |
Started raising of fishes. |
|
|
| Dec. 1989 |
Succeeded in a synthesis of YAG Ceramics
by Joint research with National |
|
Insutitute for Research in Inorganic Materials,
Science and Technology
|
|
Agency and stared production. |
| Dec. 1996 |
The Osaka Securities Exchange second section
of the stock was listed. |
|
Increased Capital to 1,320,000,000yen. |
| Jul. 1998 |
Started manufacture of EB coated hard type calcium silicate board. |
|
(EB : Electronbeam hardened paint) |
