Patents by Inventor Alexander Lanier Gulledge

Alexander Lanier Gulledge 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).

  • METHOD OF MAKING POLYBENZIMIDAZOLE
    Publication number: 20170145162
    Abstract: A method of making a polybenzimidazole (PBI) includes the steps of: reacting, in a solution, an organic compound having at least 2 amino groups with an organic aldehyde adduct, the reactants comprise at least 8% by weight of the solution. A solvent of the solution may be selected from the group of: N,N-dimethylacetamide (DMAc), N,N-dimethylformamide (DMF), dimethylsulfoxide (DMSO), N-methyl-2-pyrrolidone (NMP), tetramethylene sulfone, and combinations thereof. The organic aldehyde adduct may be an organic aldehyde bisulfite adduct. The organic aldehyde portion of the organic aldehyde adduct being aliphatic, alicyclic, aromatic, heterocyclic, or heteroaromatic aldehyde or mixtures thereof. The polybenzimidazole may have an intrinsic viscosity of at least 0.40 dl/g.
    Type: Application
    Filed: February 8, 2017
    Publication date: May 25, 2017
    Inventors: Brian C. Benicewicz, Alexander Lanier Gulledge, Warren P. Steckle, JR., Gregory S. Copeland, Bobby G. Dawkins
  • Method of making polybenzimidazole
    Patent number: 9598541
    Abstract: A method of making a polybenzimidazole (PBI) includes the steps of: reacting, in a solution, an organic compound having at least 2 amino groups with an organic aldehyde adduct, the reactants comprise at least 8% by weight of the solution. A solvent of the solution may be selected from the group of: N,N-dimethylacetamide (DMAc), N,N-dimethylformamide (DMF), dimethylsulfoxide (DMSO), N-methyl-2-pyrrolidone (NMP), tetramethylene sulfone, and combinations thereof. The organic aldehyde adduct may be an organic aldehyde bisulfite adduct. The organic aldehyde portion of the organic aldehyde adduct being aliphatic, alicyclic, aromatic, heterocyclic, or heteroaromatic aldehyde or mixtures thereof. The polybenzimidazole may have an intrinsic viscosity of at least 0.40 dl/g.
    Type: Grant
    Filed: June 2, 2014
    Date of Patent: March 21, 2017
    Assignee: PBI Performance Products, Inc.
    Inventors: Brian C. Benicewicz, Alexander Lanier Gulledge, Warren P. Steckle, Jr., Gregory S. Copeland, Bobby G. Dawkins
  • METHOD OF MAKING POLYBENZIMIDAZOLE
    Publication number: 20140357831
    Abstract: A method of making a polybenzimidazole (PBI) includes the steps of: reacting, in a solution, an organic compound having at least 2 amino groups with an organic aldehyde adduct, the reactants comprise at least 8% by weight of the solution. A solvent of the solution may be selected from the group of: N,N-dimethylacetamide (DMAc), N,N-dimethylformamide (DMF), dimethylsulfoxide (DMSO), N-methyl-2-pyrrolidone (NMP), tetramethylene sulfone, and combinations thereof. The organic aldehyde adduct may be an organic aldehyde bisulfite adduct. The organic aldehyde portion of the organic aldehyde adduct being aliphatic, alicyclic, aromatic, heterocyclic, or heteroaromatic aldehyde or mixtures thereof. The polybenzimidazole may have an intrinsic viscosity of at least 0.40 dl/g.
    Type: Application
    Filed: June 2, 2014
    Publication date: December 4, 2014
    Applicant: PBI Performance Products, Inc.
    Inventors: Brian C. Benicewicz, Alexander Lanier Gulledge, Warren P. Steckle, JR., Gregory S. Copeland, Bobby G. Dawkins