Patents by Inventor Raquel Keledjian

Raquel Keledjian 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).

  • Controlled-release amine-catalyzed, sulfur-containing polymer and epdxy compositions
    Patent number: 9006360
    Abstract: Compositions comprising sulfur-containing polymers such as polythioethers and polysulfides, polyepoxides, and controlled-release amine catalysts useful in aerospace sealant applications are disclosed. The compositions exhibit extended pot life and the rate of curing can be tailored for specific applications.
    Type: Grant
    Filed: October 24, 2012
    Date of Patent: April 14, 2015
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Raquel Keledjian, Lawrence G. Anderson, Renhe Lin
  • METHODS FOR MAKING CURED SEALANTS BY ACTINIC RADIATION AND RELATED COMPOSITIONS
    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
  • Methods for making cured sealants by actinic radiation and related compositions
    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
  • MICHAEL ADDITION CURING CHEMISTRIES FOR SULFUR-CONTAINING POLYMER COMPOSITIONS
    Publication number: 20140357812
    Abstract: The use of Michael addition curing chemistries in compositions comprising sulfur-containing polymers such as polythioethers and polysulfides useful in aerospace sealant applications are disclosed. Sulfur-containing adducts comprising terminal Michael acceptor groups are also disclosed.
    Type: Application
    Filed: August 19, 2014
    Publication date: December 4, 2014
    Inventors: Lawrence G. Anderson, Juexiao Cai, Marfi Ito, Raquel Keledjian, Renhe Lin
  • MICHAEL ADDITION CURING CHEMISTRIES FOR SULFUR-CONTAINING POLYMER COMPOSITIONS
    Publication number: 20140357811
    Abstract: The use of Michael addition curing chemistries in compositions comprising sulfur-containing polymers such as polythioethers and polysulfides useful in aerospace sealant applications are disclosed. Sulfur-containing adducts comprising terminal Michael acceptor groups are also disclosed.
    Type: Application
    Filed: August 19, 2014
    Publication date: December 4, 2014
    Inventors: Lawrence G. Anderson, Juexlao Cai, Marfi Ito, Raquel Keledjian, Renhe Lin
  • Polythioethers, moisture curable compositions and methods for their manufacture and use
    Patent number: 8901256
    Abstract: One-part moisture curable sealant compositions and methods of making the same are provided. The compositions include a silyl-functional polythioether and a polyepoxide. Methods of making sealant compositions are also provided.
    Type: Grant
    Filed: January 12, 2012
    Date of Patent: December 2, 2014
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Carissa Pajel, Alfredo M. Reyes, Jr., Raquel A. Keledjian, Gordon Zabrecky
  • Michael addition curing chemistries for sulfur-containing polymer compositions
    Patent number: 8871896
    Abstract: The use of Michael addition curing chemistries in compositions comprising sulfur-containing polymers such as polythioethers and polysulfides useful in aerospace sealant applications are disclosed. Sulfur-containing adducts comprising terminal Michael acceptor groups are also disclosed.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: October 28, 2014
    Assignee: PRC DeSoto International, Inc.
    Inventors: Lawrence G. Anderson, Juexiao Cai, Marfi Ito, Raquel Keledjian, Renhe Lin
  • COMPOSITIONS COMPRISING THIOL-TERMINATED POLYMERS AND SULFUR-CONTAINING ETHYLENICALLY UNSATURATED SILANES AND RELATED CURED SEALANTS
    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
  • Compositions comprising thiol-terminated polymers and sulfur-containing ethylenically unsaturated silanes and related cured sealants
    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
  • Polyfunctional sulfur-containing epoxies and compositions thereof
    Patent number: 8710159
    Abstract: Disclosed are polyfunctional sulfur-containing epoxies and compositions containing polyfunctional sulfur-containing epoxies. The polyfunctional sulfur-containing epoxies may be used as a curing agent and combined with polythioethers and/or polysulfides used to provide high elongation sealants useful in aerospace applications.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: April 29, 2014
    Assignee: PRC DeSoto International, Inc.
    Inventors: Timothy Blackford, Juexiao Cai, Raquel Keledjian, Renhe Lin, Jose Luzano, Chandra B. Rao, Bruce Virnelson
  • CONTROLLED-RELEASE AMINE-CATALYZED, SULFUR-CONTAINING POLYMER AND EPOXY COMPOSITIONS
    Publication number: 20140110881
    Abstract: Compositions comprising sulfur-containing polymers such as polythioethers and polysulfides, polyepoxides, and controlled-release amine catalysts useful in aerospace sealant applications are disclosed. The compositions exhibit extended pot life and the rate of curing can be tailored for specific applications.
    Type: Application
    Filed: October 24, 2012
    Publication date: April 24, 2014
    Inventors: Raquel Keledjian, Lawrence G. Anderson, Renhe Lin
  • MICHAEL ADDITION CURING CHEMISTRIES FOR SULFUR-CONTAINING POLYMER COMPOSITIONS
    Publication number: 20130345371
    Abstract: The use of Michael addition curing chemistries in compositions comprising sulfur-containing polymers such as polythioethers and polysulfides useful in aerospace sealant applications are disclosed. Sulfur-containing adducts comprising terminal Michael acceptor groups are also disclosed.
    Type: Application
    Filed: June 21, 2012
    Publication date: December 26, 2013
    Applicant: PRC-DeSoto International, Inc.
    Inventors: Lawrence G. Anderson, Juexiao Cai, Marfi Ito, Raquel Keledjian, Renhe Lin
  • COPOLYMERIZABLE SULFUR-CONTAINING ADHESION PROMOTERS AND COMPOSITIONS THEREOF
    Publication number: 20130344287
    Abstract: Disclosed are sulfur-containing polymers containing copolymerizable adhesion promoters and compositions including sealant compositions useful in aerospace applications comprising sulfur-containing polymers containing copolymerizable adhesion promoters. In particular, polythioethers and polysulfides incorporating copolymerizable adhesion promoters are disclosed.
    Type: Application
    Filed: July 12, 2013
    Publication date: December 26, 2013
    Applicant: PRC-DeSoto International, Inc.
    Inventors: Raquel Keledjian, Renhe Lin, Bruce Virnelson
  • POLYFUNCTIONAL SULFUR-CONTAINING EPOXIES AND COMPOSITIONS THEREOF
    Publication number: 20130345372
    Abstract: Disclosed are polyfunctional sulfur-containing epoxies and compositions containing polyfunctional sulfur-containing epoxies. The polyfunctional sulfur-containing epoxies may be used as a curing agent and combined with polythioethers and/or polysulfides used to provide high elongation sealants useful in aerospace applications.
    Type: Application
    Filed: June 21, 2012
    Publication date: December 26, 2013
    Applicant: PRC-DeSoto International, Inc.
    Inventors: Timothy Blackford, Juexiao Cai, Raquel Keledjian, Renhe Lin, Jose Lozano, Chandra B. Rao, Bruce Virnelson
  • Copolymerizable sulfur-containing adhesion promoters and compositions thereof
    Patent number: 8513339
    Abstract: Disclosed are sulfur-containing polymers containing copolymerizable adhesion promoters and compositions including sealant compositions useful in aerospace applications comprising sulfur-containing polymers containing copolymerizable adhesion promoters. In particular, polythioethers and polysulfides incorporating copolymerizable adhesion promoters are disclosed.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: August 20, 2013
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Raquel Keledjian, Renhe Lin, Bruce Vimelson
  • POLYTHIOETHERS, MOISTURE CURABLE COMPOSITIONS AND METHODS FOR THEIR MANUFACTURE AND USE
    Publication number: 20130181161
    Abstract: One-part moisture curable sealant compositions and methods of making the same are provided. The compositions include a silyl-functional polythioether and a polyepoxide. Methods of making sealant compositions are also provided.
    Type: Application
    Filed: January 12, 2012
    Publication date: July 18, 2013
    Applicant: PRC-DeSoto International, Inc.
    Inventors: Carissa Pajel, Alfredo M. Reyes, JR., Raquel A. Keledjian, Gordon Zabrecky
  • COMPOSITIONS COMPRISING THIOL-TERMINATED POLYMERS AND SULFUR-CONTAINING ETHYLENICALLY UNSATURATED SILANES AND RELATED CURED SEALANTS
    Publication number: 20120040103
    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: August 13, 2010
    Publication date: February 16, 2012
    Applicant: PRC-DeSoto International, Inc.
    Inventors: Raquel Keledjian, Renhe Lin, Chandra Rao, Bruce Virnelson
  • METHODS FOR MAKING CURED SEALANTS BY ACTINIC RADIATION AND RELATED COMPOSITIONS
    Publication number: 20120040104
    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: Application
    Filed: August 13, 2010
    Publication date: February 16, 2012
    Applicant: PRC-DeSoto International, Inc.
    Inventors: Raquel Keledjian, Renhe Lin, Chandra Rao, Bruce Virnelson