Patents by Inventor Sanjay E. Rastogi

Sanjay E. Rastogi 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).

  • SHAPED PART OF AN ULTRA HIGH MOLECULAR WEIGHT POLYETHYLENE
    Publication number: 20100087929
    Abstract: Shaped parts of ultra high molecular weight polyethylene (UHMWPE) are made by a process comprising melt processing, wherein a) the UHMWPE has a weight average molecular weight (Mw) of at least 1*106 g/mol, b) during the shaping the storage plateau modulus of the UHMWPE (G*) is kept at a value of at most 1.5 MPa, c) whereafter, before the cooling, the G* is raised to its final value. The shaped parts may advantageously be used in medical applications, e.g., as an element of a hip or knee prosthesis.
    Type: Application
    Filed: December 15, 2009
    Publication date: April 8, 2010
    Applicant: STICHTING DUTCH POLYMER INSTITUTE
    Inventors: Sanjay E. Rastogi, Kirti Garkhail, Robert Duchateau, Gerardus Johannes Maria Gruter, Dirk Reinier Lippits
  • Process for the preparation of a shaped part of an ultra high molecular weight polyethylene
    Patent number: 7671159
    Abstract: The invention relates to a process for the manufacture of a shaped part of ultra high molecular weight polyethylene (UHMWPE) comprising melt processing, wherein a) the UHMWPE has a weight average molecular weight (Mw) of at least 1*106 g/mol, b) during the shaping the storage plateau modulus of the UHMWPE (G*) is kept at a value of at most 1.5 MPa, c) whereafter, before the cooling, the G* is raised to its final value. The invention further relates to a shaped part obtainable with the process and the use of the shaped part in a medical application.
    Type: Grant
    Filed: June 26, 2003
    Date of Patent: March 2, 2010
    Assignee: Stichting Dutch Polymer Institute
    Inventors: Sanjay E. Rastogi, Kirti Garkhail, Robert Duchateau, Gerardus Johannes Maria Gruter, Dirk Reinier Lippits