Patents by Inventor Ya-Ching Chang

Ya-Ching 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).

  • Publication number: 20150086385
    Abstract: A method for controlling pumping of a plurality of pump units in a wet well is disclosed. The method uses a genetic algorithm to determine which of the pump units is to be started and its initial operating frequency when the liquid level in the wet well reaches a first predetermined level for pumping. During the pumping process, the pumping control method monitors the liquid level in the wet well in real time to obtain real-time state information and fine-adjusts the initial operating frequency of the pump unit to be started according to the real-time state information. Therefore, the present disclosure achieves optimum efficiency and energy saving.
    Type: Application
    Filed: September 24, 2013
    Publication date: March 26, 2015
    Applicant: WATER RESOURCES AGENCY, MINISTRY OF ECONOMIC AFFAIRS
    Inventors: Chung-Hsien LU, Ya-Ching CHANG, Hao-Ting CHAO, Hsin-Yi CHUNG
  • Publication number: 20090264495
    Abstract: An oral sustained-release pharmaceutical composition of indapamide and a process for producing the foregoing pharmaceutical composition are provided. The pharmaceutical composition comprises indapamide in an amount between 0.2% and 4% (w/w) of the composition, a hydrophilic polymer in an amount between 10 % and 30% (w/w) of the composition, a dry binding agent in an amount between 2% and 20% (w/w) of the composition, and an erosion modifier in an amount between 40% and 80% (w/w) of the composition. The sustained-release pharmaceutical composition of indapamide could be obtained at lower expenditure and produced in a safe and economical manner.
    Type: Application
    Filed: June 26, 2009
    Publication date: October 22, 2009
    Applicant: STANDARD CHEM. & PHARM. CO., LTD.
    Inventors: Chunyi YEH, Yi-Lung WANG, Ya-Sheng YANG, Ya-Ching CHANG CHIEN
  • Publication number: 20080138412
    Abstract: A sustained release alfuzosin hydrochloride formulation contains alfuzosin hydrochloride as about 1% to about 5% by weight of the formulation, hydrophilic polymers as about 35% to about 75% by weight of the formulation, hydrophobic polymers as about 10% to about 30% by weight of the formulation, disintegrating agents as 10% to 30% by weight of the formulation and a binder as about 2% to about 12% by weight of the formulation. The hydrophilic and hydrophobic polymers are used as the release-modulating agent to control the dissolution profile of the alfuzosin hydrochloride formulation so that the formulation releases alfuzosin hydrochloride slowly and continuously as the formulation passed through the gastrointestinal tract. The present invention also relates to a method for preparing the above formulation.
    Type: Application
    Filed: December 6, 2006
    Publication date: June 12, 2008
    Inventors: Fu-Yung Lin, Fang-Hsiung Hsiao, Ya-Ching Chang Chien
  • Publication number: 20080113030
    Abstract: A sustained release tamsulosin formulation contains tamsulosin, a hydrophobic polymer, a microsphere forming agent and a diluent. The hydrophobic polymers include pH-dependent and pH-independent polymers are used as the release-modulating agent to control the dissolution profile of tamsulosin formulation so that the formulation releases tamsulosin slowly and continuously as the formulation passed through the stomach and gastrointestinal tract. The present invention further relates to a method for preparing the sustained release tamsulosin formulation.
    Type: Application
    Filed: November 9, 2006
    Publication date: May 15, 2008
    Inventors: Ching-Fen Hsiao, Sung-Jen Chen, Ya-Ching Chang Chien
  • Publication number: 20060182803
    Abstract: The present invention relates to an oral sustained-release pharmaceutical composition of indapamide and a process for producing the foregoing pharmaceutical composition. The pharmaceutical composition comprises indapamide in the amount 0.2% to 4% (w/w) of the composition, a hydrophilic polymer in the amount 10% to 30% (w/w) of the composition, a dry binding agent in the amount 2% to 20% (w/w) of the composition, and an erosion modifier in the amount 40% to 80% (w/w) of the composition. The present invention also relates to a method for delivering indapamide to a patient in need of indapamide-related therapies, which comprises administering to the patient a therapeutically effective amount of a sustained-release pharmaceutical composition in accordance with the present invention.
    Type: Application
    Filed: February 17, 2005
    Publication date: August 17, 2006
    Inventors: Chunyi Yeh, Yi-Lung Wang, Ya-Sheng Yang, Ya-Ching Chang Chein
  • Publication number: 20060165132
    Abstract: Disclosed is a computer peripheral interface comprising a mainframe end unit for connection with a mainframe of the computer and for receiving/transmitting signals from/to the mainframe; and a user end unit for connection with a plurality of peripherals and for receiving/transmitting signals from/to the respective peripherals. The user end unit and mainframe end unit are separately implemented in different individual objects, and connected with each other by means of a connection medium so that the signals are transferred therebetween. The connection medium can be implemented by optical fiber. The user end unit can be integrated in one of the peripherals such as the monitor, while the mainframe end unit can be integrated in the mainframe of the computer.
    Type: Application
    Filed: November 15, 2004
    Publication date: July 27, 2006
    Inventor: Ya-Ching Chang