A series of wholly aromatic, thermotropic polyesters, derived from 3,3’-bis (phenyl)-4,4’-biphenol (DPBP), nonlinear 4,4’-benzophenone dicarboxylic acid (4,4’-BDA), and various linear comonomers, were prepared by the melt polycondensation reaction and characterized for their thermotropic properties by a variety of experimental techniques. The homopolymer of DPBP with 4,4’-BDA had a fusion temperature (T-f) at 265 degrees C, exhibited a nematic phase, and had a liquid crystalline range of 105 degrees C. All of the copolyesters of DPBP with 4,4’-BDA and either 30 mol % 4-hydroxybenzoic acid (HBA), 6-hydroxy-2-naphthoic acid (HNA), or 50 mol % terephthalic acid (TA), 2,6-naphthalenedicarboxylic acid (2,6-NDA) had low T-f values in the range of 220-285 degrees C, exhibited a nematic phase, and had accessible isotropization transitions (T-f) in the range of 270-420 degrees C, respectively. Their accessible T-i values would enable one to observe a biphase structure. Each of the copolymers with HBA or HNA had a much broader range of liquid crystalline phase. In contrast, each of the copolymers with TA or 2,6-NDA had a relatively narrow range of liquid crystalline phase. Each of these polyesters had a glassy, nematic morphology that was confirmed with the DSC, PLM, WAXD, and SEM studies. As expected, they had higher glass transition temperatures (T-g) in the range of 161-217 degrees C than those of other liquid crystalline polyesters, and excellent thermal stabilities (T-d) in the range of 494-517 degrees C, respectively. Despite their noncrystallinity, they were not soluble in common organic solvents with the exception that the homopolymer and its copolymer with TA had limited solubility in CHCl3. However, they were soluble in the usual mixture of p-chlorophenol/1,1,2,2-tetrachloroethane (60/40 by weight) with the exception of the copolymer with 2,6-NDA.