Patents by Inventor Stephen J. Hobbs

Stephen J. Hobbs 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).

  • 3-9-diphosphaspiroundecane-stabilized polymer compositions
    Patent number: 5308901
    Abstract: The present invention provides an improved process for making diphosphaspiroundecanes and product-by-process, wherein the process comprises reacting a hydroxyl-substituted organic compound, phosphorous trichloride and pentaerythritol to form an organic-substituted diphosphaspiroundecane such that formation of said organic-substituted diphosphaspiroundecane takes place in the presence of a tri-n-alkylamine having n-alkyl moieties such that each n-alkyl moiety has at least three carbon atoms. The present invention is also directed to bis-3,9-(2,6-di-t-alkyl-4-alkylphenoxy)-2,4,8,10-tetroxa-3,9-diphosphaspri o[5.5]undecanes and polymer composition containing an effective amount of same.
    Type: Grant
    Filed: September 27, 1993
    Date of Patent: May 3, 1994
    Assignee: General Electric Company
    Inventors: Stephen J. Hobbs, Kevin J. Sheehan, William P. Enlow
  • 3-9-diphosphaspiroundecanes and process for making 3-9-diphosphaspiroundecanes
    Patent number: 5137950
    Abstract: The present invention provides an improved process for making diphosphaspiroundecanes and product-by-process, wherein the process comprises reacting a hydroxyl-substituted organic compound, phosphorous trichloride and pentaerythritol to form an organic-substituted diphosphaspiroundecane such that formation of said organic-substituted diphosphaspiroundecane takes place in the presence of a tri-n-alkylamine having n-alkyl moieties such that each n-alkyl moiety has at least three carbon atoms. The present invention is also directed to bis-3,9-(2,6-di-t-alkyl-4-alkylphenoxy)-2,4,8,10-tetroxa-3,9-diphosphaspri o[5.5]undecanes and polymer compositions containing an effective amount of same.
    Type: Grant
    Filed: September 25, 1991
    Date of Patent: August 11, 1992
    Assignee: Borg-Warner Specialty Chemicals, Inc.
    Inventors: Stephen J. Hobbs, Kevin J. Sheehan, William P. Enlow