Patents by Inventor Prema Rao

Prema Rao 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).

  • High concentration homogenized collagen compositions
    Patent number: 5428024
    Abstract: High concentration collagen compositions having improved persistence when administered for soft tissue augmentation are prepared from both cross-linked and non-cross-linked collagen starting materials. Suspensions of the starting materials are subjected to vigorous mechanical disruption to reduce the average collagen fiber size to below a threshold level which enhances the injectability of the composition. Thus, both enhanced injectability and enhanced persistence may be achieved using the same formulations.
    Type: Grant
    Filed: April 19, 1994
    Date of Patent: June 27, 1995
    Assignee: Collagen Corporation
    Inventors: George Chu, Brenda Trobaugh, Prema Rao