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| Number | Title | Issue Date |
| 5233085 | Preparation of 2,4,5-trifluorobenzoic acid by decarboxylation of 3,4,6-trifluorophthalic acid 3,4,6-Trifluorophthalic acid may be decarboxylated in a controlled manner to form 2,4,5-trifluorobenzoic acid by heating the phthalic acid in a dipolar aprotic solvent in the absence of any catalyst.... | 08/03/1993 |
| 5233054 | Process for the preparation of halophthalic anhydrides Halophthalic anhydrides are prepared by the liquid phase reaction of a brominating agent with halogen substituted hexa- or tetra-hydrophthalic anhydrides.... | 08/03/1993 |
| 5233049 | Highly fluorinated bis-imides This invention relates to novel fluorinated bis-imides of the formula ##STR1## where X is H or F. The compounds are useful as additives to enhance the properties of high performance polymers such as polyimides.... | 08/03/1993 |
