Patents by Inventor M. Hashem Akhavan-Tafti

M. Hashem Akhavan-Tafti 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).

  • Patent number: 5650099
    Abstract: A dicationic surfactant for enhancing the chemiluminescence of chemiluminescent compounds particularly dioxetanes which are triggerable is described. The surfactant has the formulaX.sup.- (R.sub.1).sub.3 A.sup.+ CH.sub.2 -Link-CH.sub.2 A.sup.+ (R.sub.2).sub.3 X.sup.-wherein A is selected from the group consisting of phosphorus and nitrogen atoms separately or together, wherein X is an anionic counterion and R.sub.1 and R.sub.2 are selected from the group consisting of unsubstituted and substituted alkyl and aralkyl groups containing 1 to 20 carbon atoms and R.sub.1 and R.sub.2 can be the same or different, and wherein Link is a carbon chain group selected from the group consisting of dialkylenearyl, aryl, alkylene, alkenylene and alkynylene groups containing 4 to 20 carbon atoms. The surfactants are particularly useful in Western and Southern blot assays.
    Type: Grant
    Filed: May 16, 1995
    Date of Patent: July 22, 1997
    Assignee: Lumigen, Inc.
    Inventors: M. Hashem Akhavan-Tafti, Zahra Arghavani
  • Patent number: 5484556
    Abstract: A dicationic surfactant for enhancing the chemiluminescence of chemiluminescent compounds particularly dioxetanes which are triggerable is described. The surfactant has the formulaX.sup.- (R.sub.1).sub.3 A.sup.+ CH.sub.2 --Link--CH.sub.2 A.sup.+ (R.sub.2).sub.3 X.sup.-wherein A is selected from the group consisting of phosphorus and nitrogen atoms separately or together, wherein X is an anionic counterion and R.sub.1 and R.sub.2 are selected from the group consisting of unsubstituted and substituted alkyl and aralkyl groups containing 1 to 20 carbon atoms and R.sub.1 and R.sub.2 can be the same or different, and wherein Link is a carbon chain group selected from the group consisting of dialkylenearyl, aryl, alkylene, alkenylene and alkynylene groups containing 4 to 20 carbon atoms. The surfactants are particularly useful in Western and Southern blot assays.
    Type: Grant
    Filed: May 16, 1995
    Date of Patent: January 16, 1996
    Assignee: Lumigen, Inc.
    Inventors: M. Hashem Akhavan-Tafti, Zahra Arghavani
  • Patent number: 5451347
    Abstract: A dicationic surfactant for enhancing the chemiluminescence of chemiluminescent compounds particularly dioxetanes which are triggerable is described. The surfactant has the formulaX.sup.- (R.sub.1).sub.3 A.sup.+ CH.sub.2 --Link--CH.sub.2 A.sup.+ (R.sub.2).sub.3 X.sup.-wherein A is selected from the group consisting of phosphorus and nitrogen atoms separately or together, wherein X is an anionic counterion and R.sub.1 and R.sub.2 are selected from the group consisting of unsubstituted and substituted alkyl and aralkyl groups containing 1 to 20 carbon atoms and R.sub.1 and R.sub.2 can be the same or different, and wherein Link is a carbon chain group selected from the group consisting of dialkylenearyl, aryl, alkylene, alkenylene and alkynylene groups containing 4 to 20 carbon atoms. The surfactants are particularly useful in Western and Southern blot assays.
    Type: Grant
    Filed: June 24, 1993
    Date of Patent: September 19, 1995
    Assignee: Lumigen, Inc.
    Inventors: M. Hashem Akhavan-Tafti, Zahra Arghavani