Patents by Inventor Dhanjoo N. Ghista

Dhanjoo N. Ghista 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).

  • Prosthetic closure element for the replacement of the mitral and tricuspid valve in the human heart
    Patent number: 4218783
    Abstract: A prosthetic heart valve has a tubular valve housing, a suture ring, and a membrane-like gate supported within the housing. The flexible membrane is generally elliptical in shape and is fastened in the housing along half its periphery. Flexure of the membrane moves it between an open position which permits blood flow through the housing and a closed position which blocks the flow path of the housing.
    Type: Grant
    Filed: September 21, 1978
    Date of Patent: August 26, 1980
    Assignee: Dr. E. Fresenius, Chem.-Pharm. Industrie KG
    Inventors: Helmut Reul, Dhanjoo N. Ghista