Patents by Inventor Lucy M Dutta

Lucy M Dutta 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).

  • Non-linear optical devices and materials therefor
    Patent number: 7081984
    Abstract: Materials suitable for use in non-linear optical devices comprise morpholinium or thiomorpholinium salts of hydroxy-substituted aliphatic or aromatic carboxylic acids selected from tartaric acid and hydroxy-substituted benzoic and cinnamic acids, which salts have a non-centrosymmetric crystalline form. Preferred salts include morpholinium 3-hydroxybenzoate, morpholinium 4-hydroxybenzoate, morpholinium 3,5-dihydroxybenzoate, morpholinium 3-fluoro-4-hydroxybenzoate, dimorpholinium 2,3,5,6-tetrafluoro-4-hydroxybenzoate, morpholinium 4-(4-hydroxyphenyl)benzoate, morpholinium tartrate, morpholinium 4-hydroxycinnamate, thiomorpholinium 4-hydroxy-benzoate and thiomorpholinium 3,5-hydroxybenzoate.
    Type: Grant
    Filed: May 5, 2000
    Date of Patent: July 25, 2006
    Assignee: Qinetiq Limited
    Inventors: Gurmit S Bahra, Penelope A Chaloner, Lucy M Dutta, William Healy