Number | Date | Country | Kind |
---|---|---|---|
196 45 855 | Nov 1996 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3094978 | McCray | Jun 1963 | |
3923446 | Budden et al. | Dec 1975 | |
4400180 | Marion et al. | Aug 1983 |
Number | Date | Country |
---|---|---|
36 12 218 | Apr 1986 | DEX |
43 44 535 | Dec 1993 | DEX |
52150776 | Dec 1977 | JPX |
Entry |
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B. Elvers et al, "Ullmann's Encyclopedia of Industrial Chemistry", vol. A12, 1990, XP002085682. |