Patents by Inventor Norman A. Meinhardt

Norman A. Meinhardt 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).

  • Patent number: 4234435
    Abstract: Carboxylic acid acylating agents are derived from polyalkenes such as polybutenes, and a dibasic, carboxylic reactant such as maleic or fumaric acid or certain derivatives thereof. These acylating agents are characterized in that the polyalkenes from which they are derived have a Mn value of about 1300 to about 5000 and a Mw/Mn value of about 1.5 to about 4. The acylating agents are further characterized by the presence within their structure of at least 1.3 groups derived from the dibasic, carboxylic reactant for each equivalent weight of the groups derived from the polyalkene. The acylating agents can be reacted with a further reactant subject to being acylated such as polyethylene polyamines and polyols (e.g., pentaerythritol) to produce derivatives useful per se as lubricant additives or as intermediates to be subjected to post-treatment with various other chemical compounds and compositions, such as epoxides, to produce still other derivatives useful as lubricant additives.
    Type: Grant
    Filed: February 23, 1979
    Date of Patent: November 18, 1980
    Assignee: The Lubrizol Corporation
    Inventors: Norman A. Meinhardt, Kirk E. Davis
  • Patent number: 4123370
    Abstract: Reaction mixtures comprising components (A) Group II metal salts of phosphorus-containing acids, (B) basically reacting alkali metal compounds, and (C) optionally, di- or trivalent metal-containing salts are suitable for the preparation of basic metal salt compositions of phosphorus-containing acids, with the proviso that components (A), (B), and (C) are not the same. The basic metal salt compositions are useful in the preparation of lubricants.
    Type: Grant
    Filed: March 20, 1978
    Date of Patent: October 31, 1978
    Assignee: The Lubrizol Corporation
    Inventor: Norman A. Meinhardt