American Carbons, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4465556 Pyrolysis system with hot gas recirculationExpiredJul 28, 82Aug 14, 84[C10B]
4419185 Pyrolysis system with hot gas recirculationExpiredJul 16, 81Dec 06, 83[C10B]
4373995 Pyrolysis system utilizing pyrolytic oil recycleExpiredOct 05, 81Feb 15, 83[C10B]
4317703 Pyrolysis process utilizing pyrolytic oil recycleExpiredDec 03, 80Mar 02, 82[C10K, C10B]
4230602 Process for producing highly activated carbonaceous productsExpiredOct 12, 79Oct 28, 80[C01B, C10B]

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