Patents by Inventor B. Sandhya Singh

B. Sandhya Singh 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).

  • Oil-in-water emulsion formulation containing free and entrapped hydroquinone and retinol
    Patent number: 6896890
    Abstract: An oil-in-water emulsion formulation containing hydroquinone and retinol, which comprises an oil-in-water emulsion containing free hydroquinone, hydroquinone entrapped in absorbent micro-agglomerates and/or impregnated in porous microparticles; and retinol-impregnated microparticles.
    Type: Grant
    Filed: May 16, 2002
    Date of Patent: May 24, 2005
    Assignee: R.P. Scherer Technologies, Inc.
    Inventors: B. Sandhya Singh, Subhash J. Saxena, Marie-Helen Beausoleil
  • Fluorouracil-containing formulation
    Patent number: 6670335
    Abstract: Oil-in-water emulsion formulations contain both free fluorouracil and fluorouracil impregnated in porous microparticles. The formulations are suitable for topical administration, and are useful for the treatment of solar keratoses, actinic keratoses, and superficial basal cell carcinomas.
    Type: Grant
    Filed: March 5, 2001
    Date of Patent: December 30, 2003
    Assignee: A. P. Pharma, Inc.
    Inventors: B. Sandhya Singh, Subhash J. Saxena
  • Oil-in-water emulsion formulation containing free and entrapped hydroquinone and retinol
    Publication number: 20030032680
    Abstract: An oil-in-water emulsion formulation containing hydroquinone and retinol, which comprises an oil-in-water emulsion containing free hydroquinone, hydroquinone entrapped in absorbent micro-agglomerates and/or impregnated in porous microparticles; and retinol-impregnated microparticles.
    Type: Application
    Filed: May 16, 2002
    Publication date: February 13, 2003
    Inventors: B. Sandhya Singh, Subhash J. Saxena, Marie-Helene Beausoleil
  • Fluorouracil-containing formulation
    Publication number: 20020165198
    Abstract: Oil-in-water emulsion formulations contain both free fluorouracil and fluorouracil impregnated in porous microparticles. The formulations are suitable for topical administration, and are useful for the treatment of solar keratoses, actinic keratoses, and superficial basal cell carcinomas.
    Type: Application
    Filed: March 5, 2001
    Publication date: November 7, 2002
    Inventors: B. Sandhya Singh, Subhash J. Saxena