Patents by Inventor Renhe Lin

Renhe Lin 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: 20200172777
    Abstract: Compositions that are resistant to hydraulic fluid and aviation fuel contain sulfur-containing prepolymers and solvent-resistant organic fillers. The compositions are useful in aerospace sealant applications.
    Type: Application
    Filed: February 5, 2020
    Publication date: June 4, 2020
    Applicant: PRC-DeSoto International, Inc.
    Inventors: Renhe Lin, Weibin Cui
  • Patent number: 10597360
    Abstract: Hydroxyl-containing bis(alkenyl) ethers can be incorporated into the backbone of polythioether prepolymers and can be used as curing agents in thiol-terminated polythioether prepolymer compositions. Cured sealants prepared using compositions containing hydroxyl-containing bis(alkenyl) ether-containing polythioether prepolymers and/or hydroxyl-containing bis(alkenyl) ether curing agents exhibit improved physical properties such as rapid curing and compatibility with fillers suitable for use in aerospace sealant applications.
    Type: Grant
    Filed: February 1, 2018
    Date of Patent: March 24, 2020
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Weibin Cui, Renhe Lin
  • Patent number: 10597565
    Abstract: Compositions that are resistant to hydraulic fluid and aviation fuel contain sulfur-containing prepolymers and solvent-resistant organic fillers. The compositions are useful in aerospace sealant applications.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: March 24, 2020
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Renhe Lin, Weibin Cui
  • Publication number: 20190382532
    Abstract: Sulfur-containing poly(alkenyl) ethers can be incorporated into the backbone of polythioether prepolymers and can be used as curing agents in thiol-terminated polythioether prepolymer compositions. Cured sealants prepared using compositions containing sulfur-containing poly(alkenyl) ether-containing polythioether prepolymers and/or sulfur-containing poly(alkenyl) ether curing agents exhibit improved physical properties suitable for use in aerospace sealant applications.
    Type: Application
    Filed: November 3, 2017
    Publication date: December 19, 2019
    Applicant: PRC-DeSoto International, Inc.
    Inventors: WEIBIN CUI, RENHE LIN
  • Patent number: 10370561
    Abstract: Urethane/urea-containing bis(alkenyl) ethers can be incorporated into the backbone of polythioether prepolymers and can be used as curing agents in thiol-terminated polythioether prepolymer compositions. Cured sealants prepared using compositions containing urethane/urea-containing bis(alkenyl) ether-containing polythioether prepolymers and/or urethane/urea-containing bis(alkenyl) ether curing agents exhibit improved physical properties suitable for use in aerospace sealant applications.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: August 6, 2019
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Weibin Cui, Renhe Lin
  • Publication number: 20190211244
    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: March 15, 2019
    Publication date: July 11, 2019
    Inventors: RAQUEL KELEDJIAN, RENHE LIN, CHANDRA RAO, BRUCE VIRNELSON
  • Publication number: 20190169465
    Abstract: Actinic radiation-curable compositions containing polythiols and urethane/urea-containing polyalkenyl prepolymers that can be used for aerospace coatings and sealants. The coatings can be applied to surfaces and rapidly cured.
    Type: Application
    Filed: August 8, 2017
    Publication date: June 6, 2019
    Applicant: PRC-DeSoto International, Inc.
    Inventors: Bruce Virnelson, Chandra Rao, Renhe Lin
  • Patent number: 10273391
    Abstract: Thiol-terminated polythioether compositions and sealants exhibit an extended working time and rapidly cure at room temperature at the end of the working time are disclosed. The compositions comprise a combination of pyridine catalysts.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: April 30, 2019
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Weibin Cui, Renhe Lin
  • Patent number: 10233369
    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: Grant
    Filed: May 1, 2018
    Date of Patent: March 19, 2019
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Raquel Keledjian, Renhe Lin, Chandra Rao, Bruce Virnelson
  • Publication number: 20190010370
    Abstract: Compositions that are resistant to hydraulic fluid and aviation fuel contain sulfur-containing prepolymers and solvent-resistant organic fillers. The compositions are useful in aerospace sealant applications.
    Type: Application
    Filed: July 7, 2017
    Publication date: January 10, 2019
    Applicant: PRC-DeSoto International, Inc.
    Inventors: Renhe Lin, Weibin Cui
  • Publication number: 20180244966
    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: May 1, 2018
    Publication date: August 30, 2018
    Inventors: RAQUEL KELEDJIAN, RENHE LIN, CHANDRA RAO, BRUCE VIRNELSON
  • Patent number: 10047259
    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: Grant
    Filed: December 4, 2014
    Date of Patent: August 14, 2018
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Raquel Keledjian, Renhe Lin, Chandra Rao, Bruce Virnelson
  • Publication number: 20180194979
    Abstract: Thiol-terminated polythioether compositions and sealants exhibit an extended working time and rapidly cure at room temperature at the end of the working time are disclosed. The compositions comprise a combination of pyridine catalysts.
    Type: Application
    Filed: January 11, 2017
    Publication date: July 12, 2018
    Inventors: WEIBIN CUI, RENHE LIN
  • Patent number: 10011751
    Abstract: Compositions comprising Michael acceptor-terminated sulfur-containing prepolymers, thiol-terminated sulfur-containing prepolymers, and e phosphine catalysts useful in aerospace sealant applications are disclosed. The compositions exhibit extended pot life, cure rapidly following activation, and provide cured sealants having improved properties useful in aerospace sealant applications.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: July 3, 2018
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Lawrence G. Anderson, Juexiao Cai, Mark P. Bowman, Renhe Lin
  • Publication number: 20180155280
    Abstract: Hydroxyl-containing bis(alkenyl) ethers can be incorporated into the backbone of polythioether prepolymers and can be used as curing agents in thiol-terminated polythioether prepolymer compositions. Cured sealants prepared using compositions containing hydroxyl-containing bis(alkenyl) ether-containing polythioether prepolymers and/or hydroxyl-containing bis(alkenyl) ether curing agents exhibit improved physical properties such as rapid curing and compatibility with fillers suitable for use in aerospace sealant applications.
    Type: Application
    Filed: February 1, 2018
    Publication date: June 7, 2018
    Inventors: Weibin Cui, Renhe Lin
  • Patent number: 9988487
    Abstract: Compositions comprising sulfur-containing prepolymers such as polythioether prepolymers, polyepoxides, and a blocked 1,8-diazabicyclo[5.4.0]undec-7-ene bicarbonate catalyst useful as aerospace sealants are disclosed. The compositions exhibit extended working time and the curing rate can be tailored for specific applications.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: June 5, 2018
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Hongying Zhou, Juexiao Cai, Renhe Lin
  • Patent number: 9951252
    Abstract: Sealant systems that are pre-applied to a part to be sealed include a layer of an uncured moisture-curable sealant and a frangible barrier coating applied over the uncured moisture-curable sealant. During assembly, the barrier coating breaks to expose the moisture-curable sealant to moisture to initiate the curing reaction. The moisture-curable sealant systems are suitable for aerospace applications and include sulfur-containing prepolymers. Various curing chemistries can be used.
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: April 24, 2018
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Bruce Virnelson, Renhe Lin
  • Patent number: 9920006
    Abstract: Hydroxyl-containing bis(alkenyl) ethers can be incorporated into the backbone of polythioether prepolymers and can be used as curing agents in thiol-terminated polythioether prepolymer compositions. Cured sealants prepared using compositions containing hydroxyl-containing bis(alkenyl) ether-containing polythioether prepolymers and/or hydroxyl-containing bis(alkenyl) ether curing agents exhibit improved physical properties such as rapid curing and compatibility with fillers suitable for use in aerospace sealant applications.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: March 20, 2018
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Weibin Cui, Renhe Lin
  • Publication number: 20170369432
    Abstract: Hydroxyl-containing bis(alkenyl) ethers can be incorporated into the backbone of polythioether prepolymers and can be used as curing agents in thiol-terminated polythioether prepolymer compositions. Cured sealants prepared using compositions containing hydroxyl-containing bis(alkenyl) ether-containing polythioether prepolymers and/or hydroxyl-containing bis(alkenyl) ether curing agents exhibit improved physical properties such as rapid curing and compatibility with fillers suitable for use in aerospace sealant applications.
    Type: Application
    Filed: June 28, 2016
    Publication date: December 28, 2017
    Inventors: WEIBIN CUI, RENHE LIN
  • Publication number: 20170369737
    Abstract: Urethane/urea-containing bis(alkenyl) ethers can be incorporated into the backbone of polythioether prepolymers and can be used as curing agents in thiol-terminated polythioether prepolymer compositions. Cured sealants prepared using compositions containing urethane/urea-containing bis(alkenyl) ether-containing polythioether prepolymers and/or urethane/urea-containing bis(alkenyl) ether curing agents exhibit improved physical properties suitable for use in aerospace sealant applications.
    Type: Application
    Filed: June 28, 2016
    Publication date: December 28, 2017
    Applicant: PRC-DeSoto International, Inc.
    Inventors: WEIBIN CUI, RENHE LIN