Number | Name | Date | Kind |
---|---|---|---|
6235680 | Ziemer et al. | May 2001 | B1 |
Number | Date | Country |
---|---|---|
1336983 | Nov 1973 | GB |
Entry |
---|
Chemical Abstracts, vol. 131, (6), abst.No. 73368j pub.Aug. 9, 1999 which abstracts Jpn.Kokai Tokkyo Koho, Jp 11 171,856, 38 pages published Jun. 29, 1999. |