Number | Date | Country | Kind |
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9926855 | Nov 1999 | GB |
Number | Name | Date | Kind |
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4414160 | Erpenbach et al. | Nov 1983 | A |
5817869 | Hinnenkamp et al. | Oct 1998 | A |
6472558 | Key et al. | Oct 2002 | B1 |
Number | Date | Country |
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0 114 703 | Oct 1986 | EP |
0 749 948 | Dec 1996 | EP |
1 406 672 | Sep 1975 | GB |
Entry |
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Derwent Publications Ltd., London, GB; Class E16, AN 1978-50693A; XP002221883 & JP TE 063308 A; Mitsubishi Gas Chem. Ind. Co. Ltd.; Jun. 6, 1978 (abstract). |