Process for producing pitch used as starting material for the making of carbon materials
Patent 4789455 Issued on December 6, 1988. Estimated Expiration Date: 
July 24, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 24, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorsAssigneeApplicationNo. 07/077211 filed on 07/24/1987US Classes:208/39, ASPHALTS, TARS, PITCHES AND RESINS; MAKING, TREATING AND RECOVERY208/22, Asphalts, tars, pitches and resins208/40, By chemical conversion of oil208/44, Chemical modification of asphalt, tar, pitch or resin585/11, Containing aromatic ring585/422, By condensation of entire cyclic molecules or entire hydrocarbyl moieties thereof, e.g., polymerization, etc.585/425Ring carbon of one molecule joined to ring carbon of otherExaminersPrimary: Sneed, Helen M. S.Assistant: Myers, Helane Attorney, Agent or FirmInternational ClassesC10C 3/00 (20060101)C10C 1/00 (20060101) C10C 1/19 (20060101) Foreign Application Priority Data1986-07-29 JPAbstractA process for producing pitch useful as a starting material for the manufacture of a carbon material is provided. The pitch is produced by polymerizing a condensed nuclear aromatic compound or a material containing the same. The polymerization is carried out in the presence of a hydrogen fluoride/boron trifluoride catalyst system. The condensed nuclear aromatic compounds which may be used in this process are naphthalene, anthracene, phenanthrene, acenaphthene, acenaphthylene, pyrene and mixtures thereof.Other References
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