Patents by Inventor Carl Walter Stuebe

Carl Walter Stuebe has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Substituted hydroxyaromatic acid esters and lubricants containing the same
    Patent number: 4098708
    Abstract: Esters of alkyl-substituted hydroxyaromatic carboxylic acids (especially alkyl-substituted salicylic acids) and the like, in which the alkyl substituent contains at least about 10 carbon atoms, are useful as dispersant additives for lubricants and fuels. Particularly useful are esters in which the substituent is derived from propylene, 1-butene or isobutene and has a molecular weight of about 150-1750, and in which the alkyl moiety is derived from pentaerythritol. Such esters are preferably prepared by the reaction of the corresponding organic hydroxy compound with a vic-hydroxyalkyl ester of the salicylic acid.
    Type: Grant
    Filed: June 16, 1975
    Date of Patent: July 4, 1978
    Assignee: The Lubrizol Corporation
    Inventor: Carl Walter Stuebe