{HEAD ~ The applicants discovery} of {TAIL ~ the improved chemical stability} of resins and resin precursors provided by the anion (x F) also provides means for improving fluoride bearing polymerizable monomers generally, for example including the ester based monomers described in the above cited Rawls et al. patents 
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{ HEAD ~ The applicants discovery } of { TAIL ~ the improved chemical stability } of resins and resin precursors provided by the anion ( x F ) also provides means for improving fluoride bearing polymerizable monomers generally , for example including the ester based monomers described in the above cited Rawls et al . patents
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