Number | Name | Date | Kind |
---|---|---|---|
2615784 | McClellan | Oct 1952 | |
3030173 | Kurzke et al. | Apr 1962 | |
3275732 | Macleod et al. | Sep 1966 | |
3330709 | Zelnick | Jul 1967 | |
3634580 | Watase et al. | Jan 1972 | |
3669931 | Annis et al. | Jun 1972 | |
3739056 | Evans et al. | Jun 1973 | |
4045431 | Fagerburg | Aug 1977 |
Number | Date | Country |
---|---|---|
44-15919 | Jul 1969 | JPX |
Entry |
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Bjorkstein, Polyesters and Their Applications, Reinhold Publishing Corp., New York, N.Y., 1956, pp. 156, 157, 158, 324, 325, 460, 461, 476 and 477. |