Number | Date | Country | Kind |
---|---|---|---|
3929740 | Sep 1989 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
2015912 | Sommer | Oct 1935 | |
2100090 | Sommer et al. | Nov 1937 | |
2113819 | Tucker | Apr 1938 | |
2119872 | Wiegand | Jun 1938 | |
2121305 | Schrader et al. | Jun 1938 | |
2127841 | Gellendien | Aug 1938 | |
2151241 | Sommer et al. | Mar 1939 | |
2728759 | Keil | Dec 1955 | |
3004021 | Selle et al. | Oct 1961 | |
3738913 | Johnsen et al. | Jun 1973 | |
3898129 | Fujimoto et al. | Aug 1975 | |
3985722 | Yoshida et al. | Oct 1976 | |
4067963 | Ishii | Jan 1978 | |
4234475 | Sokol | Nov 1980 | |
4279996 | Yoshioka et al. | Jul 1981 | |
4285986 | Cioca et al. | Aug 1981 | |
4293647 | Monsheimer et al. | Oct 1981 | |
4324805 | Olsen | Apr 1982 | |
4406833 | Boehme et al. | Sep 1983 | |
4451385 | Tavss et al. | May 1984 | |
4494994 | Cioca et al. | Jan 1985 | |
4659740 | Usher | Apr 1987 | |
4705682 | Moeller et al. | Oct 1987 |
Entry |
---|
Kirk-Othmeri Encyclopedia of Chemical Technology, vol. 19, 1969, pp. 508-516. |