Patents by Inventor Yufen Hu

Yufen Hu 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: 11970641
    Abstract: The present disclosure generally relates to ionic compositions which may be used in or as an adhesive material for selectively adhering two items together. More particularly, but not exclusively, the present disclosure relates to ionic compositions that include a cationic imidazolium compound and an anionic compound such as a sulfonyl imide compound.
    Type: Grant
    Filed: March 2, 2018
    Date of Patent: April 30, 2024
    Inventors: Stanislaw Rachwal, Yufen Hu, Hongxi Zhang
  • Publication number: 20230174830
    Abstract: An electrically peelable adhesive composition including: an acrylic polymer, in which the acrylic polymer is a product of reacting a mixture including a polar monomer including a hydroxyl group and a polar monomer including an alkoxy group; an ionic liquid including a cation, a first anion and a second anion, in which the first anion is an alkyl sulfonate and the second anion is a sulfonylimide; and a vinyl compound including nitrogen.
    Type: Application
    Filed: March 30, 2021
    Publication date: June 8, 2023
    Inventors: Eduardo AGUIRRE, Yufen HU, Stanislaw RACHWAL, Peng WANG
  • Patent number: 11655402
    Abstract: An electrically debondable adhesive composition is described. The adhesive is comprised of a basic ionic liquid and an optionally crosslinked polymer, wherein the basic ionic liquid is comprised of an amino-ammonium cation and a bis(fluorosulfonyl)imide anion.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: May 23, 2023
    Assignee: NITTO DENKO CORPORATION
    Inventors: Stanislaw Rachwal, Tissa Sajoto, Yufen Hu, Hongxi Zhang, Peng Wang
  • Publication number: 20210101869
    Abstract: The present disclosure relates to ionic compositions having hydrophobic characteristics and/or reduced corrosiveness upon application to metallic substrates. An ionic composition, which may be used as an adhesive material for selectively adhering two electroconducting surface together is also described herein, wherein the application of electromotive force to the electroconducting materials can reduce the adhesion of the adhesive material. Some embodiments provide a hydrophobic ionic debonding compound include a benzimidazolium cation and a sulfonylimide anion.
    Type: Application
    Filed: April 10, 2018
    Publication date: April 8, 2021
    Inventors: Stanislaw Rachwal, Yufen Hu, Hongxi Zhang, Peng Wang
  • Publication number: 20200308458
    Abstract: The present disclosure generally relates to ionic compositions which may be used in or as an adhesive material for selectively adhering two items together. More particularly, but not exclusively, the present disclosure relates to ionic compositions that include a mixture of ammonium and imidazolium cations with an anionic sulfonylimide compound or a mixture of various imidazolium cations with an anionic sulfonylimide compound.
    Type: Application
    Filed: November 20, 2018
    Publication date: October 1, 2020
    Inventors: Yufen Hu, Hongxi Zhang, Peng Wang
  • Publication number: 20200299548
    Abstract: An adhesive can include at least one imidazolium cation of Formula (1) and at least one fluorosulfonylimide anion of Formula (2). In these formulae: R1 is a hydrogen, C1-C3 alkyl or an optionally substituted C1-C12 alkylamine, R3 is each independently a C1-C3 alkyl or an optionally substituted C1-C12 alkylamine, and R2, R4, R5 are each independently a hydrogen or a C1-C3 alkyl; Formula (1); Formula (2).
    Type: Application
    Filed: November 20, 2018
    Publication date: September 24, 2020
    Inventors: Stanislaw Rachwal, Tissa Sajoto, Yufen Hu, Hongxi Zhang, Peng Wang
  • Publication number: 20200299552
    Abstract: An electrically debondable adhesive composition is described. The adhesive is comprised of a basic ionic liquid and an optionally crosslinked polymer, wherein the basic ionic liquid is comprised of an amino-ammonium cation and a bis(fluorosulfonyl)imide anion.
    Type: Application
    Filed: November 20, 2018
    Publication date: September 24, 2020
    Inventors: Stanislaw Rachwal, Tissa Sajoto, Yufen Hu, Hongxi Zhang, Peng Wang
  • Publication number: 20200299302
    Abstract: An electrically debondable adhesive composition is described. The adhesive is comprised of a basic ionic liquid and an optionally crosslinked polymer, wherein the basic ionic liquid is comprised of a cyclic amino-ammonium cation and a bis(fluorosulfonyl)imide anion.
    Type: Application
    Filed: November 20, 2018
    Publication date: September 24, 2020
    Inventors: Stanislaw Rachwal, Tissa Sajoto, Yufen Hu, Hongxi Zhang, Peng Wang
  • Publication number: 20200071581
    Abstract: The present disclosure generally relates to ionic compositions which may be used in or as an adhesive material for selectively adhering two items together. More particularly, but not exclusively, the present disclosure relates to ionic compositions that include a cationic imidazolium compound and an anionic compound such as a sulfonyl imide compound.
    Type: Application
    Filed: March 2, 2018
    Publication date: March 5, 2020
    Inventors: Stanislaw Rachwal, Yufen Hu, Hongxi Zhang
  • Patent number: 10005787
    Abstract: This disclosure is related to photo-stable chromophores which are useful in various applications. Chromophores disclosed herein include a bis-triazole core, two electron-donors at C-4 and C-8, and two groups derived from pentaerythritol (R?OR5) or 1,1,1-tris(hydroxymethyl)methane (R?H) at N-2 and N-6. Such structures have been proven to have greater then five times higher photo-stability than their analogs with simpler alkyl groups at N-2 and N-6.
    Type: Grant
    Filed: January 7, 2016
    Date of Patent: June 26, 2018
    Assignee: Nitto Denko Corporation
    Inventors: Stanislaw Rachwal, Yufen Hu
  • Publication number: 20180002337
    Abstract: This disclosure is related to photo-stable chromophores which are useful in various applications. Chromophores disclosed herein include a bis-triazole core, two electron-donors at C-4 and C-8, and two groups derived from pentaerythritol (R?OR5) or 1,1,1-tris(hydroxymethyl)methane (R?H) at N-2 and N-6. Such structures have been proven to have greater then five times higher photo-stability than their analogs with simpler alkyl groups at N-2 and N-6.
    Type: Application
    Filed: January 7, 2016
    Publication date: January 4, 2018
    Inventors: Stanislaw Rachwal, Yufen HU
  • Patent number: 9399730
    Abstract: This invention relates to an encapsulation structure comprising a luminescent wavelength conversion material for at least one solar cell or photovoltaic device which acts to enhance the solar harvesting efficiency of the solar cell device. The luminescent wavelength conversion material comprises at least one chromophore and an optically transparent polymer matrix. Application of the encapsulation structure, as disclosed herein, to solar harvesting devices, including solar cells, solar panels, and photovoltaic devices, improves the solar harvesting efficiency of the device by widening the spectrum of incoming sunlight that can be effectively converted into electricity by the device.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: July 26, 2016
    Assignee: Nitto Denko Corporation
    Inventors: Hongxi Zhang, Stanislaw Rachwal, Jie Cai, Yufen Hu, Michiharu Yamamoto, Zongcheng Jiang, Bogumila Rachwal, Shuangxi Wang, Peng Wang
  • Patent number: 9394479
    Abstract: Described herein are wavelength conversion films that are easy-to-apply to solar cells, solar panels, or photovoltaic devices using an adhesive layer. The wavelength conversion films include a wavelength conversion layer with a photostable chromophore and are useful for improving the solar harvesting efficiency of solar cells, solar panels, and photovoltaic devices.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: July 19, 2016
    Assignee: Nitto Denko Corporation
    Inventors: Hongxi Zhang, Stanislaw Rachwal, Jie Cai, Yufen Hu, Michiharu Yamamoto, Zongcheng Jiang, Bogumila Rachwal, Shuangxi Wang, Peng Wang
  • Publication number: 20130341573
    Abstract: A photorefractive composition and a photorefractive device comprising the composition are disclosed. The composition is configured to be photorefractive upon irradiation by a laser having a wavelength in the visible light spectrum and comprises a polymer, a non linear optical chromophore, a plasticizer, and an electrolyte. In an embodiment, the percentage of polymer recurring units that comprise a charge transport moiety is less than 30%. In an embodiment, the electrolyte comprises one or more of ammonium salts, heterocyclic ammonium salts, and phosphonium salts. In an embodiment, the polymer is selected from the group consisting of polycarbonate, polyurea, polyurethane, poly(meth)acrylate, polyester, polyimide, and combinations thereof. Preferably, the composition has a diffraction efficiency of about 25% or greater upon irradiation with a visible light laser.
    Type: Application
    Filed: February 22, 2012
    Publication date: December 26, 2013
    Applicant: NITTO DENKO CORPORATION
    Inventors: Weiping Lin, Tao Gu, Jie Cai, Wan-Yun Hsieh, Alla Sutin, Yufen Hu, Peng Wang, Michiharu Yamamoto