Patents by Inventor Mani Krishnan

Mani Krishnan 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 for reducing performance variability of multi-layer filters
    Patent number: 8733556
    Abstract: Multi-layer membrane devices with reduced performance variability, and method of reducing performance variability of such devices. The variability is reduced by combining two or more membranes with similar pore sizes, and carefully selecting the upstream membrane based upon its performance rating, in order to control the performance of the overall device. Selective layering reduces the capacity range of the device when compared to random layering, with the mean capacity greater than overall population mean. The flux range also can be reduced, with the mean near the overall population mean. The LRV range also can be reduced, with the mean LRV near or higher than the overall population mean.
    Type: Grant
    Filed: May 5, 2009
    Date of Patent: May 27, 2014
    Assignee: EMD Millipore Corporation
    Inventors: Sal Giglia, Mani Krishnan, Nitin Satav
  • Method for reducing performance variability of multi-layer filters
    Publication number: 20090277824
    Abstract: Multi-layer membrane devices with reduced performance variability, and method of reducing performance variability of such devices. The variability is reduced by combining two or more membranes with similar pore sizes, and carefully selecting the upstream membrane based upon its performance rating, in order to control the performance of the overall device. Selective layering reduces the capacity range of the device when compared to random layering, with the mean capacity greater than overall population mean. The flux range also can be reduced, with the mean near the overall population mean. The LRV range also can be reduced, with the mean LRV near or higher than the overall population mean.
    Type: Application
    Filed: May 5, 2009
    Publication date: November 12, 2009
    Inventors: Sal Giglia, Mani Krishnan, Nitin Satav
  • Method for reducing performance variability of multi-layer filters
    Publication number: 20090277835
    Abstract: Multi-layer membrane devices with reduced performance variability, and method of reducing performance variability of such devices. The variability is reduced by combining two or more membranes with similar pore sizes, and carefully selecting the upstream membrane based upon its performance rating, in order to control the performance of the overall device. Selective layering reduces the capacity range of the device when compared to random layering, with the mean capacity greater than overall population mean. The flux range also can be reduced, with the mean near the overall population mean. The LRV range also can be reduced, with the mean LRV near or higher than the overall population mean.
    Type: Application
    Filed: May 5, 2009
    Publication date: November 12, 2009
    Inventors: Sal Giglia, Mani Krishnan, Nitin Satav
  • Methods and systems for integrity testing of porous materials
    Patent number: 7594425
    Abstract: The invention relates to integrity testing of porous material using a plurality of gases and to an apparatus and system for performing the same.
    Type: Grant
    Filed: October 10, 2006
    Date of Patent: September 29, 2009
    Assignee: Millipore Corporation
    Inventors: John J. Lewnard, Salvatore Giglia, Mani Krishnan
  • Methods and systems for integrity testing of porous materials
    Publication number: 20070089489
    Abstract: The invention relates to integrity testing of porous material using a plurality of gases and to an apparatus and system for performing the same.
    Type: Application
    Filed: October 10, 2006
    Publication date: April 26, 2007
    Applicant: Millipore Corporation
    Inventors: John Lewnard, Salvatore Giglia, Mani Krishnan