Number | Date | Country | Kind |
---|---|---|---|
43 44 549.7 | Dec 1993 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
4906651 | Hsu | Mar 1990 | |
5300424 | Hoss et al. | Apr 1994 |
Number | Date | Country |
---|---|---|
398795 | Nov 1990 | EPX |
Entry |
---|
Derwent Publications Ltd., AN 90-345639/46 & JP a-2- 250 805 Oct. 8, 1990. |
Journal of Chromatography, BD 469, 1989, "Determination of Preservatives in Cosmetic Products" De Kruijf et al. |
Varian Instrument Application, BD 11, NR. 3, 1977 "Preserving Liquid Chromatographic Column Life", B. Wadsworth. |