Patents by Inventor Stephen Yau Sang Cheng

Stephen Yau Sang Cheng 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: 8530019
    Abstract: Articles having a Shore A hardness of 50 to 95 and made from polyolefin compositions comprising an ethylene-alpha-olefin interpolymer (random or block or a mixture of the two) are paintable without the need for a primer or other surface treatment with paints free of phthalate-based plasticizer and designed to paint SBS- or SEBS-type rubber based compositions. These polyolefin compositions are free of (1) phthalate-based plasticizer, (2) halogen-containing polymer, and (3) leachable, small polymeric units derived from styrene monomer. In addition, the content of the alpha-olefin in the polyolefin composition is at least 9.7 mole percent.
    Type: Grant
    Filed: February 22, 2010
    Date of Patent: September 10, 2013
    Assignee: Dow Global Technologies LLC
    Inventors: Robert Hai-Feng He, Stephen Yau-Sang Cheng, Shuwen Peng, Jose Manu Rego, Gloria Stucchi
  • Publication number: 20130037107
    Abstract: A photovoltaic (PV) module comprising a pressure sensitive adhesive to attach solar cells and a dielectric layer to each other has been disclosed. The use of the pressure sensitive adhesive in the photovoltaic module can significantly simplify the module assembly process.
    Type: Application
    Filed: August 8, 2011
    Publication date: February 14, 2013
    Applicant: DU PONT APOLLO LTD.
    Inventors: Stephen Yau Sang CHENG, Yen Chih-He
  • Publication number: 20130014821
    Abstract: Disclosed herein is a photovoltaic module, which includes a photovoltaic member, a moisture-resistant layer, a mounting frame covering and a buffer layer. The buffer layer disposed between the moisture-resistant layer and the mounting frame, where the buffer layer is made of a material selected from the group consisting of polypropylene-based polymer, polyethylene-based polymer, polyurethane-based polymer, ethylene-vinyl acetate-based resin and a combination thereof.
    Type: Application
    Filed: July 14, 2011
    Publication date: January 17, 2013
    Applicant: Du Pont Apollo Limited
    Inventors: Stephen Yau-Sang CHENG, Chui-Ling Yip
  • Publication number: 20120308752
    Abstract: Articles having a Shore A hardness of 50 to 95 and made from polyolefin compositions comprising an ethylene-alpha-olefin interpolymer (random or block or a mixture of the two) are paintable without the need for a primer or other surface treatment with paints free of phthalate-based plasticizer and designed to paint SBS- or SEBS-type rubber based compositions. These polyolefin compositions are free of (1) phthalate-based plasticizer, (2) halogen-containing polymer, and (3) leachable, small polymeric units derived from styrene monomer. In addition, the content of the alpha-olefin in the polyolefin composition is at least 9.7 mole percent.
    Type: Application
    Filed: February 22, 2010
    Publication date: December 6, 2012
    Inventors: Robert Hai-Feng He, Stephen Yau-Sang Cheng, Shuwen Peng, Jose Manu Rego, Gloria Stucchi
  • Publication number: 20120240981
    Abstract: The invention relates to a photovoltaic (PV) module including a weatherable layer, wherein the weatherable layer comprises thermoplastic vulcanizate (TPV). The weatherable layer endows the PV module with excellent temperature resistance, weatherability, and chemical resistance.
    Type: Application
    Filed: March 24, 2011
    Publication date: September 27, 2012
    Applicant: DU PONT APOLLO LTD.
    Inventors: Stephen Yau Sang Cheng, Ka-Lok Leung
  • Publication number: 20120234376
    Abstract: The invention relates to a photovoltaic (PV) module including a weatherable layer, wherein the weatherable layer comprises an acrylic polymer. The weatherable layer endows the PV module with excellent temperature resistance, weatherability, and chemical resistance.
    Type: Application
    Filed: March 18, 2011
    Publication date: September 20, 2012
    Applicant: DU PONT APOLLO LTD.
    Inventors: Stephen Yau Sang CHENG, Ka-Lok LEUNG
  • Publication number: 20120171800
    Abstract: A method of sealing an electronic device is disclosed, comprising providing an assembly comprising first and second substrates in an opposed relationship, and an electronic device positioned between the first and second substrates; positioning a glass rod against or on the edge of the first and/or second substrate; and heating and softening the glass rod to form a hermetic seal between the first and second substrates and form a hermetically sealed electronic device.
    Type: Application
    Filed: December 30, 2010
    Publication date: July 5, 2012
    Applicant: DU PONT APOLLO Ltd.
    Inventors: Stephen Yau Sang Cheng, Chui-Ling Yip, Chung-Pui Chan
  • Publication number: 20120090778
    Abstract: Disclosed herein is a backsheet for a photovoltaic module. The backsheet includes a dielectric layer, an adhesive layer disposed on the dielectric layer, a barrier layer disposed on the adhesive layer and bonded to the dielectric layer via the adhesive layer, and a weather resistant layer directly disposed on and bonded to the barrier layer by a powder coating method.
    Type: Application
    Filed: October 18, 2010
    Publication date: April 19, 2012
    Applicant: Du Pont Apollo Limited
    Inventors: Stephen Yau-Sang CHENG, Ka-Lok LEUNG
  • Publication number: 20120042944
    Abstract: A photovoltaic panel includes a flexible substrate, an optical prism layer, and a photoelectric layer disposed between the plastic flexible substrate and the optical prism layer. The optical prism layer includes a transparent layer and a plurality of prisms attached to the transparent layer and disposed between the transparent layer and photoelectric layer.
    Type: Application
    Filed: August 15, 2011
    Publication date: February 23, 2012
    Applicant: Du Pont Apollo Limited
    Inventors: Chih-He YEN, Stephen Yau-Sang Cheng
  • Publication number: 20120042943
    Abstract: Disclosed herein is a backsheet for a photovoltaic member. The backsheet includes a weather-resistant layer, a first adhesive layer and an insulating layer. The weather-resistant layer contains chlorinated polyethylene, and the content of the chlorinated polyethylene is at least 50% by weight of the weather-resistant layer. The weather-resistant layer is situated at an outmost surface of the backsheet. The insulating layer may prevent an electric current generated by the photovoltaic member from leakage through the backsheet. The first adhesive layer is disposed between the weather-resistant layer and the insulating layer.
    Type: Application
    Filed: July 27, 2011
    Publication date: February 23, 2012
    Applicant: Du Pont Apollo Limited
    Inventor: Stephen Yau-Sang CHENG
  • Publication number: 20120037213
    Abstract: Disclosed herein is a backsheet for a photovoltaic module. The backsheet includes a protective layer and a layer of polymeric foam having a predetermined pore volume. The polymeric foam has a bulk density of about 0.01 g/cm3 to about 0.6 g/cm3 and is derived from an olefin monomer. The protective layer and the polymeric foam layer are respectively situated on the opposite surfaces of the backsheet, and the polymeric foam layer is for connecting to a photovoltaic member.
    Type: Application
    Filed: July 26, 2011
    Publication date: February 16, 2012
    Applicant: Du Pont Apollo Limited
    Inventor: Stephen Yau-Sang CHENG
  • Publication number: 20110308577
    Abstract: Disclosed herein are a photovoltaic panel and a method of manufacturing the same. The photovoltaic panel includes a photovoltaic unit having a single substrate and a protective polymer layer wrapping around the photovoltaic unit and being sealed around the edges of a surface of the substrate. The manufacturing method includes the steps of providing a substrate, forming a photovoltaic cell on a first surface of the substrate to form a photovoltaic unit, wrapping a protective polymer layer around the photovoltaic unit with a portion of the protective polymer layer extended beyond the first surface, and thermal treating the protective polymer layer so as to shrink the to protective polymer layer and thereby sealing the portion of the protective polymer layer extended beyond the first surface of the substrate around the edges of the second surface.
    Type: Application
    Filed: June 21, 2011
    Publication date: December 22, 2011
    Inventor: Stephen Yau-Sang CHENG
  • Publication number: 20110277821
    Abstract: Disclosed herein is a back sheet for a photovoltaic module. The back sheet includes a dielectric layer, an adhesive layer disposed on the dielectric layer, a barrier layer disposed on the adhesive layer and a weather resistant layer disposed on the barrier layer. The weather resistant layer includes a bituminous material.
    Type: Application
    Filed: May 6, 2011
    Publication date: November 17, 2011
    Applicant: Du Pont Apollo Limited
    Inventor: Stephen Yau-Sang CHENG
  • Publication number: 20110272005
    Abstract: A rapid-crystallizing polymer, which can rapidly crystallize from its melted state to solid state, is used to be the insulation layer of the polymer backsheet for photovoltaic modules.
    Type: Application
    Filed: May 6, 2011
    Publication date: November 10, 2011
    Applicant: Du Pont Apollo Limited
    Inventor: Stephen Yau-Sang CHENG
  • Publication number: 20110272025
    Abstract: Disclosed herein is a photovoltaic module. The photovoltaic module includes a solar cell, a polypropylene layer and a backsheet. The solar cell is capable of converting light into electricity, and has a light-receiving surface and a back surface. The polypropylene layer is disposed above the light-receiving surface of the solar cell. The polypropylene layer has a transparency of greater than 50%. The backsheet is disposed below the back surface of the solar cell.
    Type: Application
    Filed: May 3, 2011
    Publication date: November 10, 2011
    Applicant: Du Pont Apollo Limited
    Inventor: Stephen Yau-Sang CHENG
  • Publication number: 20110159271
    Abstract: A foamed gasket used in the photovoltaic module is disclosed. A method of preparing a foamed gasket is also disclosed. According to the present invention, the gasket can effectively protect a photovoltaic module against shock and reduce the possibility of moisture penetrating a seal between rigid surfaces.
    Type: Application
    Filed: December 29, 2010
    Publication date: June 30, 2011
    Inventor: Stephen Yau Sang Cheng
  • Publication number: 20110159280
    Abstract: Disclosed herein is a backsheet for a solar module. The backsheet includes a first polymeric layer, a second polymeric layer and a moisture-resistant layer. The first polymeric layer includes linear low-density polyethylene (LLDPE), low-density polyethylene (LDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE) or polycarbonate (PC). The second polymeric layer includes linear low-density polyethylene (LLDPE), low-density polyethylene (LDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), polycarbonate (PC) or Nylon. The moisture-resistant layer is disposed between the first polymeric layer and the second polymeric layer.
    Type: Application
    Filed: December 29, 2010
    Publication date: June 30, 2011
    Applicant: Du Pont Apollo Limited
    Inventor: Stephen Yau-Sang Cheng