Patents by Inventor Alexandre Blumstein

Alexandre Blumstein 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 extensively conjugated ionic polyacetylenes
    Patent number: 5037916
    Abstract: A family of ionic polyacetylenes containing long sequences of conjugated double bonds in the backbone with ionic charges adjacent to or in conjugation with the backbone, and a synthetic process for preparing them, are disclosed. These polymers, which are soluble in many solvents, including water, are mono- and di-substituted polyacetylenes that are extensively conjugated. The charge density and geometry of charge distribution depends on the number and nature of the substituents.
    Type: Grant
    Filed: March 16, 1990
    Date of Patent: August 6, 1991
    Assignee: University of Lowell
    Inventors: Alexandre Blumstein, Sundar Subramanyam
  • Novel polymeric liquid crystals and methods for their preparation
    Patent number: 4617371
    Abstract: Polymeric liquid crystals which retain their mesomorphic structure and properties associated therewith at temperatures below their glass transition temperature are described. The polymers contain mesogene and spacer units in alternating sequence in the main chain and may carry aliphatic substituents.
    Type: Grant
    Filed: November 29, 1982
    Date of Patent: October 14, 1986
    Assignee: Alexandre Blumstein
    Inventors: Alexandre Blumstein, Jawed Asrar