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| Number | Title | Issue Date |
| 4839158 | Process and composition for oral hygiene A process for enhancing oral hygiene by reducing oral microflora and for inhibiting the formation of dental plaque by applying, to the oral cavity, a composition containing (a) 0.1 to 40 parts, by weight, of a higher alkyl-N-betaine, having the structure ... | 06/13/1989 |