Number | Date | Country | Kind |
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7-140144 | Jun 1995 | JPX |
Number | Date | Country |
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2292316 | Mar 1990 | JPX |
5178954 | Jul 1993 | JPX |
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Donald J. Lyman, et al, "Polycarbodiimides and Their Derivatives", Die Maktomol. Chem. 67, pp. 1-9, Apr. 1963. |