Patents by Inventor Dung-An Chang

Dung-An Chang 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: 11999400
    Abstract: A hamper has a fabric bag, and a supporting frame assembly that has a foldable wall assembly, a base and a top frame. The foldable wall assembly has a rear frame, a left frame a right frame. The base has a rear side that is pivotally connected with the bottom side of the rear frame, with the left and right sides of the base removably coupled to the bottom sides of the left frame and the right frame, respectively. The top frame has a rear side that is removably coupled to the top side of the rear frame, with the left and right sides of the top frame removably coupled to the top sides of the left frame and the right frame, respectively. The fabric bag has four side walls, each side wall having a lip extending around the upper edge of each side wall, and four vertical corner sleeve pockets.
    Type: Grant
    Filed: June 20, 2023
    Date of Patent: June 4, 2024
    Assignee: Seville Classics Inc.
    Inventors: Edwin Ho, Wen-Dung Chang
  • Patent number: 11973192
    Abstract: The invention provides an electrode body for a cylindrical lithium battery, which is formed by winding a laminated body including a negative electrode sheet, a first separator, a positive electrode sheet, a plurality of cathode tabs and a plurality of anode tabs, wherein the negative sheet and the positive sheet have a negative electrode coating and a positive electrode coating, respectively. In the present invention, the positive electrode coating is provided on the positive electrode sheet in a specific configuration to increase the coating area of the positive electrode coating, thereby increasing the capacitance of the electrode body.
    Type: Grant
    Filed: October 7, 2021
    Date of Patent: April 30, 2024
    Assignee: E-ONE MOLI ENERGY CORP.
    Inventors: Jui-Min Tsai, Tsung-Yi Tsai, Kun-Miao Tsai, Wei-Dung Chang
  • Publication number: 20230347956
    Abstract: A hamper has a fabric bag, and a supporting frame assembly that has a foldable wall assembly, a base and a top frame. The foldable wall assembly has a rear frame, a left frame a right frame. The base has a rear side that is pivotally connected with the bottom side of the rear frame, with the left and right sides of the base removably coupled to the bottom sides of the left frame and the right frame, respectively. The top frame has a rear side that is removably coupled to the top side of the rear frame, with the left and right sides of the top frame removably coupled to the top sides of the left frame and the right frame, respectively. The fabric bag has four side walls, each side wall having a lip extending around the upper edge of each side wall, and four vertical corner sleeve pockets.
    Type: Application
    Filed: June 20, 2023
    Publication date: November 2, 2023
    Applicant: Seville Classics Inc.
    Inventors: Edwin Ho, Wen-Dung Chang
  • Patent number: 11702121
    Abstract: A hamper has a fabric bag, and a supporting frame assembly that has a foldable wall assembly, a base and a top frame. The foldable wall assembly has a rear frame, a left frame a right frame. The base has a rear side that is pivotally connected with the bottom side of the rear frame, with the left and right sides of the base removably coupled to the bottom sides of the left frame and the right frame, respectively. The top frame has a rear side that is removably coupled to the top side of the rear frame, with the left and right sides of the top frame removably coupled to the top sides of the left frame and the right frame, respectively. The fabric bag has four side walls, each side wall having a lip extending around the upper edge of each side wall, and four vertical corner sleeve pockets.
    Type: Grant
    Filed: November 20, 2022
    Date of Patent: July 18, 2023
    Assignee: Serille Classics, Inc.
    Inventors: Edwin Ho, Wen-Dung Chang
  • Publication number: 20230079350
    Abstract: A hamper has a fabric bag, and a supporting frame assembly that has a foldable wall assembly, a base and a top frame. The foldable wall assembly has a rear frame, a left frame a right frame. The base has a rear side that is pivotally connected with the bottom side of the rear frame, with the left and right sides of the base removably coupled to the bottom sides of the left frame and the right frame, respectively. The top frame has a rear side that is removably coupled to the top side of the rear frame, with the left and right sides of the top frame removably coupled to the top sides of the left frame and the right frame, respectively. The fabric bag has four side walls, each side wall having a lip extending around the upper edge of each side wall, and four vertical corner sleeve pockets.
    Type: Application
    Filed: November 20, 2022
    Publication date: March 16, 2023
    Applicant: Seville Classics Inc.
    Inventors: Edwin Ho, Wen-Dung Chang
  • Patent number: 11511784
    Abstract: A hamper has a fabric bag, and a supporting frame assembly that has a foldable wall assembly, a base and a top frame. The foldable wall assembly has a rear frame, a left frame a right frame. The base has a rear side that is pivotally connected with the bottom side of the rear frame, with the left and right sides of the base removably coupled to the bottom sides of the left frame and the right frame, respectively. The top frame has a rear side that is removably coupled to the top side of the rear frame, with the left and right sides of the top frame removably coupled to the top sides of the left frame and the right frame, respectively. The fabric bag has four side walls, each side wall having a lip extending around the upper edge of each side wall, and four vertical corner sleeve pockets.
    Type: Grant
    Filed: December 20, 2020
    Date of Patent: November 29, 2022
    Assignee: Seville Classics, Inc
    Inventors: Edwin Ho, Wen-Dung Chang
  • Publication number: 20220194452
    Abstract: A hamper has a fabric bag, and a supporting frame assembly that has a foldable wall assembly, a base and a top frame. The foldable wall assembly has a rear frame, a left frame a right frame. The base has a rear side that is pivotally connected with the bottom side of the rear frame, with the left and right sides of the base removably coupled to the bottom sides of the left frame and the right frame, respectively. The top frame has a rear side that is removably coupled to the top side of the rear frame, with the left and right sides of the top frame removably coupled to the top sides of the left frame and the right frame, respectively. The fabric bag has four side walls, each side wall having a lip extending around the upper edge of each side wall, and four vertical corner sleeve pockets.
    Type: Application
    Filed: December 20, 2020
    Publication date: June 23, 2022
    Applicant: Seville Classics Inc.
    Inventors: Edwin Ho, Wen-Dung Chang
  • Publication number: 20220115713
    Abstract: The invention provides an electrode body for a cylindrical lithium battery, which is formed by winding a laminated body including a negative electrode sheet, a first separator, a positive electrode sheet, a plurality of cathode tabs and a plurality of anode tabs, wherein the negative sheet and the positive sheet have a negative electrode coating and a positive electrode coating, respectively. In the present invention, the positive electrode coating is provided on the positive electrode sheet in a specific configuration to increase the coating area of the positive electrode coating, thereby increasing the capacitance of the electrode body.
    Type: Application
    Filed: October 7, 2021
    Publication date: April 14, 2022
    Applicant: E-ONE MOLI ENERGY CORP.
    Inventors: Jui-Min Tsai, Tsung-Yi Tsai, Kun-Miao Tsai, Wei-Dung Chang
  • Patent number: 11065687
    Abstract: A method for manufacturing hollow and other metal products of irregular shape provides metal powder and binding agent, and the two are feed-mixed and heated to a plastic state. The feed-mix is injected in a mold cavity of a first injection mold to form a first blank, and injected in a mold cavity of a second injection mold to form a second blank. The first blank and the second blank are welded together to form a built-up blank which is degreased to remove the binding agent therein. The degreased built-up blank is sintered to obtain the metal product of irregular shape.
    Type: Grant
    Filed: January 2, 2018
    Date of Patent: July 20, 2021
    Assignee: CHAMP TECH OPTICAL (FOSHAN) CORPORATION
    Inventors: Dung-Chang Yeh, Yi-Fan Lin, Jin-Hong Zhu
  • Publication number: 20200368819
    Abstract: A powder feed for injection molding process includes a first metal powder, and a second metal powder. The first metal powder and the second metal powder are mixed together evenly. The second metal powder has a mass percentage of about less than 10% of a total mass of the powder feed for injection molding process. The first metal powder is resistant to the corrosion by a chemical reagent, and the second metal powder is corrodible in the chemical reagent.
    Type: Application
    Filed: August 14, 2020
    Publication date: November 26, 2020
    Inventors: JIN-HONG ZHU, DUNG-CHANG YEH
  • Patent number: 10780499
    Abstract: A method for manufacturing a porous metal with enhanced ability to bond to a plastic subsequently powder feed for injection molding process provides a powder feed to an injection molding process, to form a green embryo. The green embryo is sent into a sintering furnace for high-temperature sintering to obtain a blank sintered product. A chemical reagent is applied to form pores on the sintered product. The powder feed includes first and second metal powders evenly mixed. The second metal powder has a mass percentage of about less than 10% of a total mass of the powder feed for injection molding process. The first metal powder is corrosion-resistant. The second metal powder is readily corrodible.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: September 22, 2020
    Assignee: CHAMP TECH OPTICAL (FOSHAN) CORPORATION
    Inventors: Jin-Hong Zhu, Dung-Chang Yeh
  • Publication number: 20200291497
    Abstract: A method of making stainless steel includes smelting metal material and atomizing and powdering the smelted metal material to obtain a first alloy powder, detecting a mass fraction of manganese in the first alloy powder, heating and kneading the first alloy powder with plastic, and granulating, injection molding, and sintering the first alloy powder kneaded with plastic to obtain stainless steel. If the mass fraction of manganese in the first alloy powder is less than 12%, before heating and kneading with plastic, a predetermined amount of manganese-containing material is added to the first alloy powder to obtain a second alloy powder having a mass fraction of manganese of 12-15%.
    Type: Application
    Filed: April 1, 2019
    Publication date: September 17, 2020
    Inventors: DUNG-CHANG YEH, JIN-HONG ZHU
  • Publication number: 20200164434
    Abstract: A method for manufacturing a porous metal with enhanced ability to bond to a plastic subsequently powder feed for injection molding process provides a powder feed to an injection molding process, to form a green embryo. The green embryo is sent into a sintering furnace for high-temperature sintering to obtain a blank sintered product. A chemical reagent is applied to form pores on the sintered product. The powder feed includes first and second metal powders evenly mixed. The second metal powder has a mass percentage of about less than 10% of a total mass of the powder feed for injection molding process. The first metal powder is corrosion-resistant. The second metal powder is readily corrodible.
    Type: Application
    Filed: February 27, 2019
    Publication date: May 28, 2020
    Inventors: JIN-HONG ZHU, DUNG-CHANG YEH
  • Publication number: 20190366430
    Abstract: A powder injection molding feedstock includes powder particles, a main binder, and a secondary binder. A glass-transition temperature of the secondary binder is greater than a glass-transition temperature of the main binder, the secondary binder coats the powder particles, and the main binder coats the secondary binder and the powder particles.
    Type: Application
    Filed: August 19, 2019
    Publication date: December 5, 2019
    Inventors: DUNG-CHANG YEH, LEI YAN, RU-JIE HUANG
  • Patent number: 10434571
    Abstract: A method for manufacturing a powder injection molding feedstock includes providing a plurality of powder particles and a secondary binder and applying primary kneading in an internal mixer. The primary mixture is cooled and crushed. A main binder is provided and put into the internal mixer to mix with the mixture that being crushed for secondary kneading to obtain the powder injection molding feedstock. Glass-transition temperature of the secondary binder is greater than glass-transition temperature of the main binder. The secondary binder coats the powder particles. The main binder coats the secondary binder and the powder particles.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: October 8, 2019
    Assignee: CHAMP TECH OPTICAL (FOSHAN) CORPORATION
    Inventors: Dung-Chang Yeh, Lei Yan, Ru-Jie Huang
  • Publication number: 20190193162
    Abstract: A method for manufacturing metal product having irregular shapes includes steps of providing powder and binding agent, and mixing the powder and binding agent as a mixed feed. The mixed feed is heated to a plastic state, and injected into a mold cavity to form a plurality of blanks. The blanks are degreased to remove the binding agent and are sintered to form workpieces. A substrate or substrates and the workpieces form different parts of the metal product having irregular shapes. The workpieces are disposed on substrate to form a preform and the preform is bonded to form the metal products of irregular shape.
    Type: Application
    Filed: February 2, 2018
    Publication date: June 27, 2019
    Inventors: YI-FAN LIN, DUNG-CHANG YEH
  • Publication number: 20190168307
    Abstract: A method for manufacturing hollow and other metal products of irregular shape provides metal powder and binding agent, and the two are feed-mixed and heated to a plastic state. The feed-mix is injected in a mold cavity of a first injection mold to form a first blank, and injected in a mold cavity of a second injection mold to form a second blank. The first blank and the second blank are welded together to form a built-up blank which is degreased to remove the binding agent therein. The degreased built-up blank is sintered to obtain the metal product of irregular shape.
    Type: Application
    Filed: January 2, 2018
    Publication date: June 6, 2019
    Inventors: DUNG-CHANG YEH, YI-FAN LIN, JIN-HONG ZHU
  • Publication number: 20190039132
    Abstract: A method for manufacturing a powder injection molding feedstock includes providing a plurality of powder particles and a secondary binder and applying primary kneading in an internal mixer. The primary mixture is cooled and crushed. A main binder is provided and put into the internal mixer to mix with the mixture that being crushed for secondary kneading to obtain the powder injection molding feedstock. Glass-transition temperature of the secondary binder is greater than glass-transition temperature of the main binder. The secondary binder coats the powder particles. The main binder coats the secondary binder and the powder particles.
    Type: Application
    Filed: October 26, 2017
    Publication date: February 7, 2019
    Inventors: DUNG-CHANG YEH, LEI YAN, RU-JIE HUANG
  • Patent number: 8932014
    Abstract: A fan assembly includes a first fan and a second fan stacked together. Each of the first fan and the second fan includes a frame and a supporting base received in the frame. Several extending portions extend from a bottom of the frame of the first fan. A buckling block is formed on an inner side face of each of the extending portions. Several receiving portions are formed at a top of the frame of the second fan corresponding to the extending portions, respectively. A positioning groove is defined in each of the receiving portions. The buckling blocks are engagingly received in the positioning grooves.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: January 13, 2015
    Assignees: Fu Zhun Precision Industry (Shen Zhen) Co., Ltd., Foxconn Technology Co., Ltd.
    Inventors: Jin-Long Zhao, Dung-Chang Yeh
  • Patent number: D807424
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: January 9, 2018
    Assignee: UNIFORM INDUSTRIAL CORP.
    Inventors: Dung-An Chang, Kang-Ting Chao