| http://www.w3.org/ns/prov#value | - A polyester as defined by claim 16 wherein R is a hydrogen atom, R is a terephthaloyl group, and X is a radical having the following formula: References Cited by the Examiner UNITED STATES PATENTS OTHER REFERENCES Jackson et al.: Industrial and Engineering Chemistry, vol. 2, No. 4, December 1963, pp. 246-256.
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