Patents by Inventor Joshua McClellan Croll

Joshua McClellan Croll 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).

  • Publication number: 20190135750
    Abstract: A method for producing an aromatic bisimide includes reacting a dialkali metal salt of a dihydroxy aromatic compound with a reactive substituted phthalimide under conditions effective to form a product mixture, introducing the product mixture to a liquid-liquid extraction column including an aqueous alkali metal hydroxide solution, and recovering from the liquid-liquid extraction column a purified aromatic bisimide having less than 500 ppm of residual dialkali metal salt of the dihydroxy aromatic compound, the corresponding dihydroxy aromatic compound, the corresponding mono-substituted salt of the dihydroxy aromatic compound, or a combination including at least one of the foregoing. A method for the manufacture of a polyetherimide from an aromatic bisimide prepared by the above method is also disclosed. A polyetherimide having less than 100 ppb of residual bisphenol A and an article made therefrom are also described.
    Type: Application
    Filed: April 20, 2017
    Publication date: May 9, 2019
    Inventors: Joshua McClellan Croll, Mohannad Aljarrah, Thomas Link Guggenheim
  • Patent number: 7915332
    Abstract: This invention relates to organic salt compositions useful in the preparation of organoclay compositions, polymer-organoclay composite compositions, and methods for the preparation of polymer nanocomposites. In one embodiment, the present invention provides an organoclay composition comprising alternating inorganic silicate layers and organic layers, said organic layers comprising a quaternary phosphonium cation having structure X wherein Ar1, Ar2, and Ar3 are independently C2-C50 aromatic radicals; Ar4 is a bond or a C2-C50 aromatic radical; ā€œaā€ is a number from 1 to about 200; ā€œcā€ is a number from 0 to 3; R1 is independently at each occurrence a halogen atom, a C1-C20 aliphatic radical, a C5-C20 cycloaliphatic radical, or a C2-C20 aromatic radical; and R2 is a halogen atom, a C1-C20 aliphatic radical, a C5-C20 cycloaliphatic radical, a C2-C50 aromatic radical, or a polymer chain.
    Type: Grant
    Filed: June 21, 2007
    Date of Patent: March 29, 2011
    Assignee: Sabic Innovative Plastics IP B.V.
    Inventors: Kwok Pong Chan, Joshua McClellan Croll, Balakrishnan Ganesan, Marcus J. Harrigan, Farid Fouad Khouri, Gurram Kishan, Ritesh Mathur, Rachel Marie Suffield, Wenhul Wang, James Mitchell White