This paper explores a uniform framework for processing temporal queries in the context of object-oriented databases. A temporal object data model is developed by extending the unified model of RDBs and OODBs from UniSQL/X with a time-dimension, that forms temporal relational-like cubes but with aggregation and inheritance hierarchies. A query algebra is thereby defined to provide an access of objects through these associations of aggregation, inheritance and time-reference. Due to the hierarchy of the data model and reducibility of the query algebra, an extensible approach to processing temporal object queries within the uniform query processing framework is attained. A set of transformation rules is identified for query rewrite, that includes the known relational and object rules plus those pertaining to the time-reference. To evaluate temporal queries involved in the path, a decomposition strategy is proposed. It has been shown that temporal object queries can be processed and optimized within the uniform query processing framework.