Patents by Inventor Rahul Dharmadhikary

Rahul Dharmadhikary 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).

  • Patent number: 8137790
    Abstract: A method of manufacturing a nonwoven fabric including at least one nonwoven web material layer having thermoplastic polymer filaments and an initial thickness Ts, wherein the method includes embossing the nonwoven web material layer to form in the layer an embossed portion having a compressed thickness Tc that is less than Ts and an expanded portion of the layer having a thickness Te that is greater than Ts.
    Type: Grant
    Filed: February 21, 2007
    Date of Patent: March 20, 2012
    Assignee: Ahlstrom Corporation
    Inventors: Rahul Dharmadhikary, Rongguo Zhao
  • Publication number: 20090169827
    Abstract: A nonwoven fabric including a nonwoven web material layer having thermoplastic polymer filaments and an initial thickness Ts, and a method to make the nonwoven web fabric including embossing the nonwoven web material layer to form an embossed portion of the layer having a compressed thickness Tc that is less than Ts and an expanded portion of the layer having a thickness Te that is greater than Ts.
    Type: Application
    Filed: February 21, 2007
    Publication date: July 2, 2009
    Applicant: AHLSTROM CORPORATION
    Inventors: Rahul Dharmadhikary, Rongguo Zhao
  • Publication number: 20060052025
    Abstract: Nonwoven laminate products having improved wet peel strength after aging and ethylene oxide sterilization, and improved drape and softness, which are suitable for medical, surgical and hygienic applications, are produced by laminating one or more nonwoven substrates on one or both sides of a cast film. The cast film is produced using conventional extrusion processes, such as co-extrusion. Multiple extruders are used to process and melt different polymers and then specially designed selector plugs and feed-blocks are used to combine the different polymers into different layers to form a multiple layer structure such as A-B, A-B-A, A-B-C, A-B-B-A, etc.
    Type: Application
    Filed: December 12, 2003
    Publication date: March 9, 2006
    Inventors: Rahul Dharmadhikary, Alexander Kronfeld, Patrick Chen, Gordon Meikle