1 | SWYX | Stauffer Chemical Co. of Wyoming | added 4/1981; eliminated 4/1990 | | NAKINA |
2 | SWYX | Rhone-Poulenc of Wyoming Co. | added 4/1990; 1/1994; eliminated 7/1996 | | NAKINA |
3 | SWYX | OCI Chemical Wyoming Co. | added 7/1996; 7/2000-7/2005; eliminated 1/2010 | | NAKINA |
4 | SWYX | Stauffer Chemical Co. of Wyoming | added 4/81; eliminated 4/90 | | NRHS |
5 | SWYX | Rhone-Poulenc of Wyoming Co. | added 4/90; 1/94; eliminated 7/96 | | NRHS |
6 | SWYX | OCI Chemical Wyoming Co. | added 7/96; 7/2000 | | NRHS |
7 | SWYX | OCI CHEMICAL WYOMING CO. [RHONE-POULENC OF WYOMING CO.; STAUFFER CHEMICAL CO.] | | | PWRC |
8 | SWYX | Stauffer Chemical of Wyoming | | | RSRV |