Quaternary ammonium salt of a mannich compound

Fuel and related compositions – Liquid fuels – Organic nitrogen compound containing

Reexamination Certificate

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C106S031430, C106S031750, C523S160000, C524S236000

Reexamination Certificate

active

08083814

ABSTRACT:
A quaternary ammonium salt detergent made from the reaction product of the reaction of: (a) Mannich reaction product having a tertiary amino group, said Mannich reaction product being prepared from the reaction of a hydrocarbyl-substituted phenol, an aldehyde, and amine; and (b) a quaternizing agent suitable for converting the tertiary amino group to a quaternary nitrogen and the use of such quaternary ammonium salt detergents in a fuel composition to reduce intake valve deposits.

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