Patents by Inventor Chandra Rao

Chandra Rao 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).

  • Publication number: 20150096306
    Abstract: A turbine nozzle vane segment includes one or more nozzle vanes extending between radially inner and outer side walls, each nozzle vane having a peripheral edge wall extending between a leading edge and a trailing edge of the vane. In one exemplary embodiment, at least one substantially radially-oriented cooling channel is formed in the peripheral edge wall at the leading edge, with openings at opposite ends of the cooling channel. The location and length of the cooling channels may vary about the peripheral edge wall, and the inner cavity of the vane may be provided with ribs extending along and adjacent the one or more cooling channels to reinforce the wall and to also provide additional cooling surface areas in the inner cavity.
    Type: Application
    Filed: October 8, 2013
    Publication date: April 9, 2015
    Applicant: General Electric Company
    Inventors: Sandeep Munshi SARANGAPANI, Ajay Gangadhar PATIL, Poorna Chandra RAO
  • Publication number: 20150086726
    Abstract: Disclosed are methods for making a cured sealant. The methods include depositing an uncured sealant composition on a substrate and exposing the uncured sealant composition to actinic radiation to provide a cured sealant. The uncured sealant composition includes a thiol-terminated polythioether, a polyene comprising a polyvinyl ether and/or a polyallyl compound, and a hydroxy-functional vinyl ether. Related sealant compositions are also disclosed.
    Type: Application
    Filed: December 4, 2014
    Publication date: March 26, 2015
    Inventors: Raquel Keledjian, Renhe Lin, Chandra Rao, Bruce Virnelson
  • Patent number: 8962782
    Abstract: Disclosed are perfluoroethers and perfluoroether compositions useful in high temperature aerospace applications. The perfluoroethers can be adapted for use with various curing chemistries.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: February 24, 2015
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Chandra Rao, Juexiao Cai, Renhe Lin
  • Patent number: 8952124
    Abstract: Bis(sulfonyl)alkanol-containing polythioethers, compositions containing bis(sulfonyl)alkanol-containing polythioethers, methods of synthesizing bis(sulfonyl)alkanol-containing polythioethers and the use of bis(sulfonyl)alkanol-containing polythioethers in aerospace sealant applications are disclosed. The bis(sulfonyl)alkanol-containing polythioethers have bis(sulfonyl)alkanol groups incorporated into the backbone of the polythioether. Cured sealant compositions comprising the bis(sulfonyl)alkanol-containing polythioethers exhibit enhanced properties suitable for aerospace sealant applications.
    Type: Grant
    Filed: June 21, 2013
    Date of Patent: February 10, 2015
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Chandra Rao, Juexiao Cai, Renhe Lin
  • Patent number: 8932685
    Abstract: Disclosed are methods for making a cured sealant. The methods include depositing an uncured sealant composition on a substrate and exposing the uncured sealant composition to actinic radiation to provide a cured sealant. The uncured sealant composition includes a thiol-terminated polythioether and a polyene comprising a polyvinyl ether and/or a polyallyl compound. Related sealant compositions are also disclosed.
    Type: Grant
    Filed: August 13, 2010
    Date of Patent: January 13, 2015
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Raquel Keledjian, Renhe Lin, Chandra Rao, Bruce Virnelson
  • Publication number: 20140378650
    Abstract: Bis(sulfonyl)alkanol-containing polythioethers, compositions containing bis(sulfonyl)alkanol-containing polythioethers, methods of synthesizing bis(sulfonyl)alkanol-containing polythioethers and the use of bis(sulfonyl)alkanol-containing polythioethers in aerospace sealant applications are disclosed. The bis(sulfonyl)alkanol-containing polythioethers have bis(sulfonyl)alkanol groups incorporated into the backbone of the polythioether. Cured sealant compositions comprising the bis(sulfonyl)alkanol-containing polythioethers exhibit enhanced properties suitable for aerospace sealant applications.
    Type: Application
    Filed: June 21, 2013
    Publication date: December 25, 2014
    Inventors: CHANDRA RAO, JUEXIAO CAI, RENHE LIN
  • Publication number: 20140335542
    Abstract: The disclosed invention includes methods and kits for the removal of white blood cells from samples of enriched rare cells.
    Type: Application
    Filed: March 14, 2014
    Publication date: November 13, 2014
    Inventors: Galla Chandra Rao, Brad Foulk, Denis Smirnov
  • Patent number: 8864930
    Abstract: Disclosed are perfluoroethers and perfluoroether compositions useful in high temperature aerospace applications. The perfluoroethers can be adapted for use with various curing chemistries.
    Type: Grant
    Filed: July 30, 2012
    Date of Patent: October 21, 2014
    Assignee: PRC De Soto International, Inc.
    Inventors: Chandra Rao, Juexiao Cai, Renhe Lin
  • Publication number: 20140295088
    Abstract: Disclosed are flexible polyamines, flexible amine-terminated polyformal adducts, flexible-amine-terminated polythioether adducts, compositions comprising flexible polyamines and isocyanate-terminated prepolymers, and compositions comprising flexible amine-terminated adducts and isocyanate-terminated prepolymers. Uses of the compositions as sealants, and particularly as aerospace sealants, are also disclosed.
    Type: Application
    Filed: June 18, 2014
    Publication date: October 2, 2014
    Inventors: Stephen J. Hobbs, Marfi Ito, Juexiao Cai, Chandra Rao, Renhe Lin
  • Publication number: 20140287579
    Abstract: Methods for fabricating dual damascene structures are provided herein. In some embodiments, a method for fabricating a dual damascene interconnect structure may include patterning a first mask layer atop a substrate disposed in a process chamber, wherein the substrate includes one or more low temperature dielectric layers to define a first etch pattern, and wherein the one or more low temperature dielectric layers are formed atop the substrate at a temperature below about 180 degrees Celsius; etching the first etch pattern into the one or more low temperature dielectric layers using an inductively coupled plasma formed by a power source capable of providing power within a range from about 10 watts to about 10,000 watts at a frequency of about 2 MHz to about 13.
    Type: Application
    Filed: March 14, 2014
    Publication date: September 25, 2014
    Applicant: APPLIED MATERIALS, INC.
    Inventors: Jayagatan Ram Vijayen, Siva Suri Chandra Rao Bhesetti
  • Publication number: 20140275474
    Abstract: Metal ligand-containing prepolymers, compositions containing metal ligand-containing prepolymers, methods of synthesizing metal ligand-containing prepolymers and the use of metal ligand-containing prepolymers in aerospace sealant applications are disclosed. The metal ligand-containing prepolymers have metal ligands incorporated into the backbone of the prepolymer. Cured sealant compositions comprising the metal ligand-containing prepolymers exhibit enhanced properties suitable for aerospace sealant applications.
    Type: Application
    Filed: October 29, 2013
    Publication date: September 18, 2014
    Applicant: PRC-DeSoto International, Inc.
    Inventors: Chandra Rao, Jun Deng, Renhe Lin
  • Publication number: 20140275461
    Abstract: Sulfone-containing polythioethers, compositions containing sulfone-containing polythioethers, methods of synthesizing sulfone-containing polythioethers and the use of sulfone-containing polythioethers in aerospace sealant applications are disclosed. The sulfone-containing polythioethers have sulfone groups incorporated into the backbone of the polythioether. Cured sealant compositions comprising the sulfone-containing polythioethers exhibit enhanced thermal resistance.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: PRC-DeSoto International, Inc.
    Inventors: Chandra Rao, Juexiao Cai, Renhe Lin
  • Patent number: 8816044
    Abstract: Disclosed are flexible polyamines, flexible amine-terminated polyformal adducts, flexible-amine-terminated polythioether adducts, compositions comprising flexible polyamines and isocyanate-terminated prepolymers, and compositions comprising flexible amine-terminated adducts and isocyanate-terminated prepolymers. Uses of the compositions as sealants, and particularly as aerospace sealants, are also disclosed.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: August 26, 2014
    Assignee: PRC DeSoto International, Inc
    Inventors: Stephen J. Hobbs, Marfi Ito, Juexiao Cai, Chandra Rao, Renhe Lin
  • Publication number: 20140186543
    Abstract: Disclosed are compositions that include: a) a thiol-terminated polymer; and b) a sulfur-containing ethylenically unsaturated silane. Related products, such as sealants, that include polymers derived from such compositions, are also disclosed.
    Type: Application
    Filed: March 7, 2014
    Publication date: July 3, 2014
    Applicant: PRC-DeSoto International, Inc.
    Inventors: Raquel Keledjian, Renhe Lin, Chandra Rao, Bruce Virnelson
  • Publication number: 20140187735
    Abstract: Disclosed are perfluoroethers and perfluoroether compositions useful in high temperature aerospace applications. The perfluoroethers can be adapted for use with various curing chemistries.
    Type: Application
    Filed: March 7, 2014
    Publication date: July 3, 2014
    Applicant: PRCĀ·DeSoto International, Inc.
    Inventors: Chandra Rao, Juexiao Cai, Renhe Lin
  • Patent number: 8729198
    Abstract: Disclosed are compositions that include: a) a thiol-terminated polymer; and b) a sulfur-containing ethylenically unsaturated silane. Related products, such as sealants, that include polymers derived from such compositions, are also disclosed.
    Type: Grant
    Filed: August 13, 2010
    Date of Patent: May 20, 2014
    Assignee: PRC DeSoto International, Inc.
    Inventors: Raquel Keledjian, Renhe Lin, Chandra Rao, Bruce Virnelson
  • Publication number: 20140051789
    Abstract: Disclosed are adhesion promoting adducts containing adhesion promoting groups and metal ligands and compositions such as sealant compositions useful in aerospace applications comprising the adhesion promoting adducts. The adhesion promoting adducts are useful as adhesion promoting additives or as a copolymerizable reactant in polymer compositions.
    Type: Application
    Filed: October 29, 2013
    Publication date: February 20, 2014
    Applicant: PRC-DeSoto International, Inc.
    Inventors: Chandra Rao, Jun Deng, Renhe Lin
  • Publication number: 20140027057
    Abstract: Disclosed are perfluoroethers and perfluoroether compositions useful in high temperature aerospace applications. The perfluoroethers can be adapted for use with various curing chemistries.
    Type: Application
    Filed: July 30, 2012
    Publication date: January 30, 2014
    Applicant: PRC-DeSoto International, Inc.
    Inventors: Juexiao Cai, Renhe Lin, Chandra Rao
  • Publication number: 20130189675
    Abstract: The invention includes methods for isolating circulating multiple myeloma cells as well as method of treating patients suspected of having diseases of abnormal plasma cells.
    Type: Application
    Filed: July 20, 2012
    Publication date: July 25, 2013
    Inventors: Steven Gross, Mark Carle Connelly, Galla Chandra Rao, Marielena Mata, Carrie Morano
  • Publication number: 20130157347
    Abstract: Compositions, systems, and methods comprising circulating endothelial cells (CECs) are provided. The compositions described herein utilize isolated CECs, including compositions in a form that allows analysis of the CECs. The systems described herein utilize isolated CECs and an analytical tool or an output from an analytical tool. The methods described herein are related to the use of isolated CECs and analytical tools for providing information, to a health care provider or the CEC donor, that is relevant to the cardiovascular health of the CEC donor. Thus, the compositions, systems and methods described herein involve both a transformation (e.g., non-isolated CECs to isolated CECs, or isolated CECs to analyzed CECs) and a machine (e.g., isolation tools and analytical tools).
    Type: Application
    Filed: July 6, 2012
    Publication date: June 20, 2013
    Applicants: Veridex, LLC, Scripps Health
    Inventors: Eric Topol, Samir Damani, Mark Connelly, Galla Chandra Rao