Patents by Inventor Dong Eun Chang

Dong Eun 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: 20230392005
    Abstract: The present invention relates to a biodegradable plastic polyhydroxyalkanoate (PHA) composition having improved adhesive properties and mechanical properties, and a method for manufacturing same. Specifically, according to the present invention, it is possible to provide a composition having excellent adhesive properties with respect to a plastic material by improving the adhesive properties by means of a single component of biodegradable PHA without requiring additional chemical substances. In addition, it is possible to provide a composition of which mechanical properties as well as adhesive properties are improved. Therefore, it is possible to manufacture products which are eco-friendly and harmless to the human body, by easily applying the composition to products requiring biodegradable properties along with adhesive properties and mechanical properties.
    Type: Application
    Filed: October 21, 2021
    Publication date: December 7, 2023
    Inventors: Yoo Kyoung SHIM, Eun-Hye LEE, Dong-Eun CHANG
  • Publication number: 20230383119
    Abstract: The present invention relates to a polyhydroxyalkanoate (PHA) composition having improved stability and water resistance, and a preparation method therefor. According to the present invention, the aggregation of water-dispersed PHA particles can be prevented, and re-dispersion is induced so that precipitation can be prevented, and thus the dispersion stability and water resistance of PHA can be improved. In addition, the composition of the present invention minimizes the use of additives to enable recycling of biodegradable PHA, and has excellent compatibility with conventional commercial products and excellent room-temperature stability. Additionally, since overuse of a surfactant and an additional step of forming an emulsion are not required in the preparation of PHA, economic feasibility can be improved.
    Type: Application
    Filed: October 29, 2021
    Publication date: November 30, 2023
    Inventors: Yoo Kyoung SHIM, Eun-Hye LEE, Dong-Eun CHANG
  • Patent number: 11549116
    Abstract: A nucleic acid molecule comprising a variant inc coding strand is disclosed as a regulator of plasmid copy number. Also disclosed is a replicon comprising the nucleic acid molecule, a promoter, and an origin of replication. Also disclosed is a vector comprising the replicon. Also disclosed is a recombinant microorganism comprising the vector.
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: January 10, 2023
    Assignee: CJ CHEILJEDANG CORPORATION
    Inventors: Ji Sun Lee, Dong Eun Chang, Sang Jun Kim, So Young Kim
  • Patent number: 11414517
    Abstract: A low-temperature processable aliphatic polyester having 3-hydroxybutryates (3HB) and 4-hydroxybutyrates (4-HB) as basic repeated structures and an adjusted content of 4-hydroxybutyrates (4HB) is described. Articles based on the aliphatic polyesters are described and include a biodegradable wax, a medical device, a low-temperature hot melt, a non-woven cloth, a bioplastic, a drug carrier, a medical wrap, a medical fiber, a medical filament, a medical stent, or an orthopedic prosthesis. Methods for preparing the aliphatic polyesters are described.
    Type: Grant
    Filed: April 21, 2020
    Date of Patent: August 16, 2022
    Assignee: CJ CHEILJEDANG CORPORATION
    Inventors: Jin Woo Choi, Yunjae Jang, Soyun Park, Dong-eun Chang, John Licata
  • Patent number: 11407983
    Abstract: A nucleic acid molecule comprising a variant rpoC coding sequence is disclosed. The variant rpoC coding sequence encodes a variant RpoC which regulates copy number of a plasmid. Also disclosed are a recombinant microorganism comprising the nucleic acid molecule, a method for regulating copy number of a subject vector in the recombinant microorganism, and a method for making a target product by use of the recombinant microorganism.
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: August 9, 2022
    Assignee: CJ CHEILJEDANG CORPORATION
    Inventors: Ji Sun Lee, Dong Eun Chang, So Young Kim
  • Publication number: 20210324136
    Abstract: The present invention relates to a low-temperature processible aliphatic polyester and provides a polymer material comprising a polyhydroxyalkanoate copolymer having an adjusted content of 4-hydroxybutyrates (4HB). By utilizing the polymer material according to the present invention, the polymer material can serve as a binder as a short-term biological support, and can be applied as a hot melt material and a non-woven cloth material to impart tacky function to a material that is very sensitive to heat. In addition, the polymer material can be easily applied to various fields.
    Type: Application
    Filed: April 21, 2020
    Publication date: October 21, 2021
    Inventors: Jin Woo CHOI, Yunjae JANG, Soyun PARK, Dong-eun CHANG, John LICATA
  • Publication number: 20200048642
    Abstract: A nucleic acid molecule comprising a variant inc coding strand is disclosed as a regulator of plasmid copy number. Also disclosed is a replicon comprising the nucleic acid molecule, a promoter, and an origin of replication. Also disclosed is a vector comprising the replicon. Also disclosed is a recombinant microorganism comprising the vector.
    Type: Application
    Filed: August 7, 2019
    Publication date: February 13, 2020
    Inventors: Ji Sun LEE, Dong Eun CHANG, Sang Jun KIM, So Young KIM
  • Publication number: 20200048619
    Abstract: A nucleic acid molecule comprising a variant rpoC coding sequence is disclosed. The variant rpoC coding sequence encodes a variant RpoC which regulates copy number of a plasmid. Also disclosed are a recombinant microorganism comprising the nucleic acid molecule, a method for regulating copy number of a subject vector in the recombinant microorganism, and a method for making a target product by use of the recombinant microorganism.
    Type: Application
    Filed: August 7, 2019
    Publication date: February 13, 2020
    Inventors: Ji Sun LEE, Dong Eun CHANG, So Young KIM
  • Publication number: 20170016035
    Abstract: Methods and genetically engineered hosts for the production of 3-carbon, 4-carbon and 5-carbon products, polymers and copolymers in methylotrophic bacteria are described herein.
    Type: Application
    Filed: June 27, 2014
    Publication date: January 19, 2017
    Inventors: Thomas M. Ramseier, Dong-eun Chang, Jian-rong Gao, William R. Farmer, Oliver P. Peoples
  • Patent number: 9090898
    Abstract: Recombinant hosts for producing polyhydroxyalkanoates and methods of producing polyhydroxyalkanoates from renewable carbon substrates are provided. Certain recombinant hosts that produce 5 carbon chemicals such as 5-aminopentanoate (5AP), 5-hydroxyvalerate (5HV), glutarate, and 1,5 pentanediol (PDO) are also provided. One embodiment provides a recombinant host expressing a gene encoding a heterologous enzyme selected from the group consisting of a polyhydroxyalkanoate synthase and a 5-hydroxyvalerate-CoA (5HV-CoA) transferase, wherein the host produces a polymer containing 5-hydroxyvalerate. Preferably, the host expresses both a polyhydroxyalkanoate synthase and a 5HV-CoA transferase. The host can be prokaryotic or eukaryotic. A preferred prokaryotic host is E. coli. The polymers produced by the recombinant hosts can be homopolymers or copolymers of 5-hydroxyvalerate. A preferred copolymer is poly(3-hydroxybutyrate-co-5-hydroxyvalerate).
    Type: Grant
    Filed: December 14, 2009
    Date of Patent: July 28, 2015
    Assignee: Metabolix, Inc.
    Inventors: William R. Farmer, Jeff Bickmeier, Chenfeng Lu, Dong-Eun Chang, Frank Skraly, Thomas Martin Ramseier
  • Publication number: 20150159184
    Abstract: Methods and genetically engineered hosts for the production of poly-4-hydroxybutrate and 4-carbon products are described herein.
    Type: Application
    Filed: March 4, 2013
    Publication date: June 11, 2015
    Inventors: Thomas M. Ramseier, Christopher W.J. McChalicher, William R. Farmer, Zhigang Zhang, Dong-Eun Chang, Jeff Bickmeier, Julie Beaulieu, Catherine Morse
  • Patent number: 8980259
    Abstract: The present invention relates to a pharmaceutical combination comprising an alpha-isoform specific phosphatidylinositol 3-kinase inhibitor compound, such as (S)-Pyrrolidine-1,2-dicarboxylic acid 2-amide 1-({4-methyl-5-[2-(2,2,2-trifluoro-1,1-dimethyl-ethyl)-pyridin-4-yl]-thiazol-2-yl}-amide), or pharmaceutically acceptable salt thereof, and an insulin-like growth factor-1 receptor (IGF1R) inhibitor (e.g., the IGF1R inhibitor ANTIBODY A, or a variant or derivative thereof), a pharmaceutical composition comprising such combination, methods for treating cancer comprising administration of therapeutically effective amounts of such inhibitors to a subject in need thereof, and uses of such combination for the treatment of cancer.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: March 17, 2015
    Assignees: Novartis AG, Amgen, Inc.
    Inventors: Xizhong Huang, Malte Peters, Karl Maria Schumacher, Zhu Alexander Cao, Jennifer Lorraine Gansert, David Dong Eun Chang
  • Patent number: 8961970
    Abstract: The present invention relates to a pharmaceutical combination comprising a MEK inhibitor compound 6-(4-bromo-2-fluorophenylamino)-7-fluoro-3-methyl-3H-benzoimidazole-5-carboxylic acid (2-hydroxyethyoxy)-amide or a pharmaceutically acceptable salt thereof and the IGF1R inhibitor ANTIBODY A, a pharmaceutical composition comprising such combination, methods for treating cancer comprising administration of a therapeutically effective amount of such combination to a subject in need thereof, and uses of such combination for the treatment of cancer.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: February 24, 2015
    Assignees: Novartis AG, Amgen Inc.
    Inventors: Xizhong Huang, Malte Peters, Jennifer Lorraine Gansert, David Dong Eun Chang, Pedro Beltran, Zhu Alexander Cao
  • Publication number: 20140023661
    Abstract: The present invention relates to a pharmaceutical combination comprising an alpha-isoform specific phosphatidylinositol 3-kinase inhibitor compound, such as (S)-Pyrrolidine-1,2-dicarboxylic acid 2-amide 1-({4-methyl-5-[2-(2,2,2-trifluoro-1,1-dimethyl-ethyl)-pyridin-4-yl]-thiazol-2-yl}-amide), or pharmaceutically acceptable salt thereof, and an IGF1R inhibitor (e.g., the IGF1R inhibitor ANTIBODY A, or a variant or derivative thereof), a pharmaceutical composition comprising such combination, methods for treating cancer comprising administration of therapeutically effective amounts of such inhibitors to a subject in need thereof, and uses of such combination for the treatment of cancer.
    Type: Application
    Filed: March 13, 2013
    Publication date: January 23, 2014
    Applicants: Amgen, Inc., Novartis Pharma AG
    Inventors: Xizhong Huang, Malte Dong Eun Peters, Karl Maria Schumacher, Zhu Alexander Cao, Jennifer Lorraine Gansert, David Dong Eun Chang
  • Publication number: 20130273061
    Abstract: The present invention relates to a pharmaceutical combination comprising a MEK inhibitor compound 6-(4-bromo-2-fluorophenylamino)-7-fluoro-3-methyl-3H-benzoimidazole-5-carboxylic acid (2-hydroxyethyoxy)-amide or a pharmaceutically acceptable salt thereof and the IGF1R inhibitor ANTIBODY A, a pharmaceutical composition comprising such combination, methods for treating cancer comprising administration of a therapeutically effective amount of such combination to a subject in need thereof, and uses of such combination for the treatment of cancer.
    Type: Application
    Filed: March 13, 2013
    Publication date: October 17, 2013
    Applicants: Amgen, Inc., Novartis Pharma AG
    Inventors: Xizhong Huang, Malte Peters, Jennifer Lorraine Gansert, David Dong Eun Chang, Pedro Beltran
  • Publication number: 20100168481
    Abstract: Recombinant hosts for producing polyhydroxyalkanoates and methods of producing polyhydroxyalkanoates from renewable carbon substrates are provided. Certain recombinant hosts that produce 5 carbon chemicals such as 5-aminopentanoate (5AP), 5-hydroxyvalerate (5HV), glutarate, and 1,5 pentanediol (PDO) are also provided. One embodiment provides a recombinant host expressing a gene encoding a heterologous enzyme selected from the group consisting of a polyhydroxyalkanoate synthase and a 5-hydroxyvalerate-CoA (5HV-CoA) transferase, wherein the host produces a polymer containing 5-hydroxyvalerate. Preferably, the host expresses both a polyhydroxyalkanoate synthase and a 5HV-CoA transferase. The host can be prokaryotic or eukaryotic. A preferred prokaryotic host is E. coli. The polymers produced by the recombinant hosts can be homopolymers or copolymers of 5-hydroxyvalerate. A preferred copolymer is poly(3-hydroxybutyrate-co-5-hydroxyvalerate).
    Type: Application
    Filed: December 14, 2009
    Publication date: July 1, 2010
    Inventors: William R. Farmer, Jeff Bickmeier, Chenfeng Lu, Dong-Eun Chang, Frank Skraly, Thomas Martin Ramseier
  • Patent number: 6448061
    Abstract: This invention relates to a mutant Escherichia coli SS373 and the production of succinic acid by using the above strain. In detail, a novel E. coli SS373 (W3110 pta::Tn10 ldhA::Km) with the deficiency in the acetate and lactate forming pathways was constructed by genetic engineering technique. An aerobically grown SS373 was then cultured by means of the anaerobic condition shift during the succinate producing stage, which resulted in the efficient production of succinic acid with a higher yield.
    Type: Grant
    Filed: January 27, 2000
    Date of Patent: September 10, 2002
    Assignee: Korea Institute of Science and Technology
    Inventors: Jao Go Pan, Soo An Shin, Chan Kyu Park, Pil Kim, Dong Eun Chang, Jae Eun Kim