Patents by Inventor Karthik Ramachandran

Karthik Ramachandran 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: 8895048
    Abstract: Substrates and devices for culturing cells are disclosed, along with methods of using the same. The substrates and devices include top surfaces with one or more divots disposed therein. Each divot is defined by an opening in the top surface, a rounded bottom surface spaced from the opening, and an interior side-wall surface extending between the rounded bottom surface and the opening. The top surface of the substrates and devices are optionally walled to form wells containing one or more divots. The substrates and devices may be used for reaggregating cells, for example, to form small islet cell clusters and for high throughput testing methodologies.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: November 25, 2014
    Assignee: The University of Kansas
    Inventors: Lisa A. Stehno-Bittel, Karthik Ramachandran
  • Publication number: 20140219997
    Abstract: A population of small reaggregated islets or clusters engineered from individual islet cells and having improved characteristics as compared to native isolated islets.
    Type: Application
    Filed: April 9, 2014
    Publication date: August 7, 2014
    Applicant: The University of Kansas
    Inventors: Cory Berkland, Lisa A. Stehno-Bittel, Teruna Siahaan, Karthik Ramachandran
  • Patent number: 8781817
    Abstract: Meaningful phrases are distinguished from chance word sequences statistically, by analyzing a large number of documents and using a statistical metric such as a mutual information metric to distinguish meaningful phrases from groups of words that co-occur by chance. In some embodiments, multiple lists of candidate phrases are maintained to optimize the storage requirement of the phrase-identification algorithm. After phrase identification, a combination of words and meaningful phrases can be used to construct clusters of documents.
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: July 15, 2014
    Assignee: Stratify, Inc.
    Inventors: Joy Thomas, Karthik Ramachandran
  • Patent number: 8735154
    Abstract: A scaffold having islet cells or small islet cell clusters attached thereto in a multilayer, and a micro-mold having divots for culturing islets, wherein islet formation is influenced by the shape and dimensions of the divots are disclosed.
    Type: Grant
    Filed: April 6, 2010
    Date of Patent: May 27, 2014
    Assignee: The University of Kansas
    Inventors: Cory Berkland, Lisa A. Stehno-Bittel, Teruna Siahaan, Karthik Ramachandran
  • Patent number: 8392175
    Abstract: Meaningful phrases are distinguished from chance word sequences statistically, by analyzing a large number of documents and using a statistical metric such as a mutual information metric to distinguish meaningful phrases from groups of words that co-occur by chance. In some embodiments, multiple lists of candidate phrases are maintained to optimize the storage requirement of the phrase-identification algorithm. After phrase identification, a combination of words and meaningful phrases can be used to construct clusters of documents.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: March 5, 2013
    Assignee: Stratify, Inc.
    Inventors: Joy Thomas, Karthik Ramachandran
  • Publication number: 20130029875
    Abstract: Substrates and devices for culturing cells are disclosed, along with methods of using the same. The substrates and devices include top surfaces with one or more divots disposed therein. Each divot is defined by an opening in the top surface, a rounded bottom surface spaced from the opening, and an interior side-wall surface extending between the rounded bottom surface and the opening. The top surface of the substrates and devices are optionally walled to form wells containing one or more divots. The substrates and devices may be used for reaggregating cells, for example, to form small islet cell clusters and for high throughput testing methodologies.
    Type: Application
    Filed: July 26, 2012
    Publication date: January 31, 2013
    Applicant: The University of Kansas
    Inventors: Lisa A. Stehno-Bittel, Karthik Ramachandran
  • Patent number: 8244767
    Abstract: Reliable identification of highly similar documents allows such documents to be treated as identical for purposes of document analysis. Identification of highly similar documents can be based on a composite hash value or other value for which the likelihood of two documents having the same value is high if and only if the documents have a high degree of similarity. Prior to performing content based analysis, the composite hash value for the current document is determined and compared to composite hash values of previously analyzed documents. If a match is found, the results of the analysis of the previous document can be applied to the current document. If no match is found, the current document is analyzed.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: August 14, 2012
    Assignee: Stratify, Inc.
    Inventors: Hakan Ancin, Rajashekhar Goli, Ankita Bakshi, Kumar Maddali, Joy Thomas, Karthik Ramachandran
  • Publication number: 20110191098
    Abstract: Meaningful phrases are distinguished from chance word sequences statistically, by analyzing a large number of documents and using a statistical metric such as a mutual information metric to distinguish meaningful phrases from groups of words that co-occur by chance. In some embodiments, multiple lists of candidate phrases are maintained to optimize the storage requirement of the phrase-identification algorithm. After phrase identification, a combination of words and meaningful phrases can be used to construct clusters of documents.
    Type: Application
    Filed: May 21, 2010
    Publication date: August 4, 2011
    Applicant: Stratify, Inc.
    Inventors: Joy Thomas, Karthik Ramachandran
  • Publication number: 20100233239
    Abstract: A scaffold having islet cells or small islet cell clusters attached thereto in a multilayer, and a micro-mold having divots for culturing islets, wherein islet formation is influenced by the shape and dimensions of the divots are disclosed.
    Type: Application
    Filed: April 6, 2010
    Publication date: September 16, 2010
    Inventors: Cory Berkland, Lisa A. Stehno-Bittel, Teruna Siahaan, Karthik Ramachandran