Number | Name | Date | Kind |
---|---|---|---|
4117250 | Foster et al. | Sep 1978 | |
4521585 | Thomsen et al. | Jun 1985 | |
4594406 | Thomsen et al. | Jun 1986 |
Number | Date | Country |
---|---|---|
2193842 | Feb 1974 | FRX |
Entry |
---|
Chemical Abstracts, vol. 81, No. 24, Dec. 16, 1974, (Columbus, Ohio, U.S.), see p. 56, Abstract 153503p, & JP, A, 7343192 (Teijin LTD) Dec. 17, 1973. |