1 | SKCX | Spartan Co-operative Creamery Co. (North Western Refrigerator Line Co.) | 7/1935 | | NAKINA |
2 | SKCX | Sinclair-Koppers Co. | added 1/1968; 4/1970; eliminated 1/1974 | | NAKINA |
3 | SKCX | Arco Polymers, Inc. | added 1/1974; eliminated 10/1974 | | NAKINA |
4 | SKCX | ARCO/Polymers, Inc. | added 10/1974; 1/1975; eliminated 10/1979 | | NAKINA |
5 | SKCX | ARCO Polymers, Inc. | added 10/1979; 1/1980; eliminated 10/1982 | | NAKINA |
6 | SKCX | ARCO Chemical Co. | added 10/1982; eliminated 1/1984; 1/1994-7/2005 (not listed) | | NAKINA |
7 | SKCX | Sinclair-Koppers Co. | added 1/68; 4/70 | | NRHS |
8 | SKCX | ARCO Polymers, Inc. | 1/75-1/80; eliminated 10/82 | | NRHS |
9 | SKCX | ARCO Chemical Co. | added 10/82; 1/94-7/2000 | | NRHS |
10 | SKCX | ARCO CHEMICAL CO. [SINCLAIR-KOPPERS CO.] | | | PWRC |
11 | SKCX | ARCO Chemical | | | RSRV |