Patents by Inventor Muraleedharan C. Vayalappil

Muraleedharan C. Vayalappil 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).

  • Method of producing a heart valve disc
    Patent number: 5458826
    Abstract: An improved valve assembly having a valve housing of cobalt-nickel or cobalt-chromium-tungsten based alloy or of titanium/titanium alloys, a sewing ring component of polyester held to the outer surface of the valve housing a disc accruder tiltably held on suitable supports within the housing, the valve disc being made of modified ultra high molecular weight polyethylene. The manufacture of the valve disc and modification of the UHMW-PE takes place simultaneously and comprises cryo machining of a blank of UHMW-PE, solid state compaction, annealing of the compact followed by further cryo machining, annealing and cleaning steps.
    Type: Grant
    Filed: May 17, 1993
    Date of Patent: October 17, 1995
    Assignee: Sree Chitratirunal Institute for Medical Sciences and Technology
    Inventors: Gobichettipalayam S. Bhuvaneshwar, Muraleedharan C. Vayalappil, Omana A. S. N. Nair