Number | Date | Country | Kind |
---|---|---|---|
38 27 561.9 | Aug 1988 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
4010038 | Iwasaki et al. | Mar 1977 | |
4394452 | Hash et al. | Jul 1983 | |
4655840 | Wittwer et al. | Apr 1987 |
Entry |
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Nikolaos A. Peppas, "Hydrogels in Medicine and Pharmacy", p. 122 no date availible. |