Patents by Inventor Alan Chang

Alan 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: 20230256077
    Abstract: The present invention relates to the production of the receptor binding domain (RBD) of the Spike glycoprotein 1 of the SARS-CoV-2 in mammalian cell expression systems, and the successive method of purification thereof. A recombinant plasmid containing the coding sequence of said RBD is produced and transfected in said mammalian cells, for example, Expi293. A high level of the protein is secreted in the medium and subsequently purified using the N-terminal tag, that can be removed by a specific protease. The present invention also includes a recombinant expression vector carrying the RBD gene, the successive methods for protein purification, the strategy for establishing a stable cell line producing the RBD, methods of use of the recombinant protein in formulating a pharmaceutical composition, including but not limited to, vaccines for preventing SARS-CoV-2 induced diseases.
    Type: Application
    Filed: December 19, 2022
    Publication date: August 17, 2023
    Inventors: Alan CHANG, Fabrizio Maria ANELLA, Clement M. LEE, Bing Lou WONG
  • Publication number: 20230076869
    Abstract: The present invention relates to the production of the receptor binding domain (RBD) of the Spike glycoprotein 1 of the SARS-CoV-2 in mammalian cell expression systems, and the successive method of purification thereof. A recombinant plasmid containing the coding sequence of said RBD is produced and transfected in said mammalian cells, for example, Expi293. A high level of the protein is secreted in the medium and subsequently purified using the N-terminal tag, that can be removed by a specific protease. The present invention also includes a recombinant expression vector carrying the RBD gene, the successive methods for protein purification, the strategy for establishing a stable cell line producing the RBD, methods of use of the recombinant protein in formulating a pharmaceutical composition, including but not limited to, vaccines for preventing SARS-CoV-2 induced diseases.
    Type: Application
    Filed: January 25, 2022
    Publication date: March 9, 2023
    Inventors: Alan CHANG, Fabrizio Maria ANELLA, Clement M. LEE, Bing Lou WONG
  • Patent number: 11564983
    Abstract: The present invention relates to the production of the receptor binding domain (RBD) of the Spike glycoprotein 1 of the SARS-CoV-2 in mammalian cell expression systems, and the successive method of purification thereof. A recombinant plasmid containing the coding sequence of said RBD is produced and transfected in said mammalian cells, for example, Expi293. A high level of the protein is secreted in the medium and subsequently purified using the N-terminal tag, that can be removed by a specific protease. The present invention also includes a recombinant expression vector carrying the RBD gene, the successive methods for protein purification, the strategy for establishing a stable cell line producing the RBD, methods of use of the recombinant protein in formulating a pharmaceutical composition, including but not limited to, vaccines for preventing SARS-CoV-2 induced diseases.
    Type: Grant
    Filed: January 25, 2022
    Date of Patent: January 31, 2023
    Assignee: Betagen Scientific Limited
    Inventors: Alan Chang, Fabrizio Maria Anella, Clement M. Lee, Bing Lou Wong
  • Publication number: 20200395097
    Abstract: Provided herein are computer-implemented methods of identifying programmed-death ligand 1 (PD-L1) expression status of a subject's sample comprising a cancer cell. In exemplary embodiments, the method comprises receiving an unlabeled expression data set for the subject's sample; aligning the unlabeled expression data set to labeled expression data according to a trained PD-L1 predictive model, wherein the trained PD-L1 predictive model has been trained with a plurality of labeled expression data sets, each labeled expression data set comprising expression data for a sample of a labeled cancer type and a labeled PD-L1 expression status; wherein aligning the unlabeled gene expression data set to labeled expression data according to the trained PD-L1 predictive model identifies PD-L1 expression status for the subject's sample. Further provided are related methods of preparing a clinical decision support information (CDSI) report and methods of determining treatment for a subject.
    Type: Application
    Filed: May 29, 2020
    Publication date: December 17, 2020
    Inventors: Alan Chang, Denise Lau, Aly Azeem Khan
  • Patent number: 9825788
    Abstract: The present disclosure relates in general to devices, systems and methods for wireless communication, and in particular to communication using a proximity integrated circuit card (PICC). Example embodiments include a circuit (100) for a PICC, the circuit comprising an input stage (101), a decoding module (106) and a bias adjustment module (117), the bias adjustment module (117) configured to receive an output code from the decoding module and provide a bias adjustment signal to the input stage (101), the bias adjustment module (117) configured to iteratively tune the bias adjustment signal based on a measurement of the output code, with successive steps tuning the bias adjustment signal by a smaller amount until the output code is within a decoding range.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: November 21, 2017
    Assignee: NXP B.V.
    Inventors: Remco Cornelis Herman Van De Beek, Liang Zhang, LiSong Feng, Juhui Li, Alan Chang
  • Publication number: 20160359648
    Abstract: The present disclosure relates in general to devices, systems and methods for wireless communication, and in particular to communication using a proximity integrated circuit card (PICC). Example embodiments include a circuit (100) for a PICC, the circuit comprising an input stage (101), a decoding module (106) and a bias adjustment module (117), the bias adjustment module (117) configured to receive an output code from the decoding module and provide a bias adjustment signal to the input stage (101), the bias adjustment module (117) configured to iteratively tune the bias adjustment signal based on a measurement of the output code, with successive steps tuning the bias adjustment signal by a smaller amount until the output code is within a decoding range.
    Type: Application
    Filed: June 3, 2016
    Publication date: December 8, 2016
    Inventors: Remco Cornelis Herman Van De Beek, Liang Zhang, LiSong Feng, Juhui Li, Alan Chang
  • Patent number: 7250904
    Abstract: A method in a mobile satellite positioning system receiver operating in cold-start mode, including searching for and detecting (310) a first satellite in a constellation of orbiting satellites, searching (320) for a second satellite based on detection probability information for non-detected satellites, the detection probability information obtained using information about one of satellites not detected or the first satellite detected. In one embodiment, the detection probability information is based on a measure of range between the non-detected satellites and the first satellite detected, and in another embodiment the detection probability information is based on a measure of angle between the non-detected satellites and the first satellite detected.
    Type: Grant
    Filed: October 8, 2004
    Date of Patent: July 31, 2007
    Assignee: Motorola, Inc.
    Inventors: Thomas Michael King, Alan Chang, Troy L. Strother
  • Publication number: 20060077096
    Abstract: A method in a mobile satellite positioning system receiver operating in cold-start mode, including searching for and detecting (310) a first satellite in a constellation of orbiting satellites, searching (320) for a second satellite based on detection probability information for non-detected satellites, the detection probability information obtained using information about one of satellites not detected or the first satellite detected. In one embodiment, the detection probability information is based on a measure of range between the non-detected satellites and the first satellite detected, and in another embodiment the detection probability information is based on a measure of angle between the non-detected satellites and the first satellite detected.
    Type: Application
    Filed: October 8, 2004
    Publication date: April 13, 2006
    Inventors: Thomas King, Alan Chang, Troy Strother