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| Number | Title | Issue Date |
| 6642192 | Amphoteric surfactants based upon epoxy succinic acid in personal care applications The present invention deals with novel amphoteric surfactants that contain a hydroxy containing poly carboxylic group. This class of compounds are hydroxy succinic derivatives made by the reaction of epoxy succinic acid and an amine. The products are high... | 11/04/2003 |
| 5958744 | Succinic acid production and purification A highly efficient process for the production and recovery of pure succinic acid from a succinate salt that involves minimal use of additional reagents, and produces virtually no waste by-products, and permits internal recycle of the base and acid values,... | 09/28/1999 |
