Number | Date | Country | Kind |
---|---|---|---|
4208206 | Mar 1992 | DEX | |
4212567 | Apr 1992 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3970540 | McBain | Jul 1976 | |
4755271 | Hosten | Jul 1988 | |
4776939 | Blasing et al. | Oct 1988 | |
4898657 | Hosten | Feb 1990 | |
4948486 | Hosten | Aug 1990 |
Number | Date | Country |
---|---|---|
362512 | Apr 1990 | EPX |
3236545 | May 1983 | DEX |
2845886 | Nov 1987 | DEX |
Entry |
---|
Soviet Inventions Illustrated, Section Ch:Chemical, Week A39, Issued Nov. 8, 1978, Derwent Publications Ltd., pp. 8-9, Summary SU-579-351. |