1. T. Nakada , H. Aoyama , A. Yamamoto (Daikin Industries) , PCT Int. Appl. 9724307 , 1997 .
2. S. Yoshikawa , R. Tamai , F. Saku , Y. Hibino (Central glass) , Jpn. Kokai Tokkyo Koho , 09241188, 1997 .
3. A. Lantz , B. Requieme , L. Wendlinger (Elf Atochem) , Ger. Offen. 19716337 , 1997 .
4. M. Y. Elsheikh , B. Chen (Elf Atochem North America) , Jpn. Kokai Tokkyo Koho 2000336048 , 2000 .