Number | Date | Country | Kind |
---|---|---|---|
3744639 | Dec 1987 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
4436778 | Dugal | Mar 1984 | |
4483891 | Lerny | Nov 1984 | |
4567069 | Jabarin | Jan 1986 | |
4708896 | Akao | Nov 1987 | |
4719143 | Jabarin | Jan 1988 |
Number | Date | Country |
---|---|---|
2528954 | Jan 1976 | DEX |
1470947 | Apr 1977 | GBX |
Entry |
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Encyclopedia of Polymer Science and Engineering, vol. 6, pp. 385-386. |