74393325
May 21, 1993
Apr 23, 1996
gas propellants for aerosols; gas used as a refrigerant in air conditioners, refrigerators and other cooling apparatus; gas used as a blowing agent in forming foamed plastics; chemicals used as a solvent for dissolving resins; and chemicals used as ingredients in the manufacture of cleaning agents for cleaning electronic elements such as semiconductors and integrated circuits
Chemicals