Patents by Inventor Chung Chu

Chung Chu 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: 12454540
    Abstract: In an embodiment, the invention is directed to prodrug compounds of L-BHDU according to the chemical structure I: Where R1 is a —(CH2)n—O—R1a group or a —(CH2)j—O—C(O)Ok—R2a group; R2 is H, a —(CH2)n—O—R1a group or a —(CH2)j—O—C(O)Ok— R2a group; R1a is independently a C6-C30alkyl group, often a C12-C22 alkyl group, often a C14-C20 alkyl group or a C16-C18 alkyl group, often a C16 or C18 alkyl group; R2a is independently a C1-C12 alkyl group, often a C2-C6 alkyl group, a C3-C4 alkyl group, an isopropyl, t-butyl or sec-butyl group, or an isopropyl or t-butyl group; Each j is independently 1-6, 1-3, often 1 or 2; Each k is 0 or 1; Each n is independently 1-6, 1-4, 2-4 or 2 or 3; or A pharmaceutically acceptable salt, solute or polymorph thereof. Additional embodiments are directed to pharmaceutical compositions based upon the disclosed chemical compounds and methods of treating or reducing the likelihood of VZV, HSV-1 or HSV-2 infections.
    Type: Grant
    Filed: February 7, 2024
    Date of Patent: October 28, 2025
    Assignees: UNIVERSITY OF GEORGIA RESEARCH FOUNDATION, INC., ANTEROGEN CO., LTD
    Inventors: Uma Sharan Singh, Chung Chu
  • Publication number: 20240199662
    Abstract: In an embodiment, the invention is directed to prodrug compounds of L-BHDU according to the chemical structure I: Where R1 is a —(CH2)n—O—R1a group or a —(CH2)j—O—C(O)Ok—R2a group; R2 is H, a —(CH2)n—O—R1a group or a —(CH2)j—O—C(O)Ok— R2a group; R1a is independently a C6-C30alkyl group, often a C12-C22 alkyl group, often a C14-C20 alkyl group or a C16-C18 alkyl group, often a C16 or C18 alkyl group; R2a is independently a C1-C12 alkyl group, often a C2-C6 alkyl group, a C3-C4 alkyl group, an isopropyl, t-butyl or sec-butyl group, or an isopropyl or t-butyl group; Each j is independently 1-6, 1-3, often 1 or 2; Each k is 0 or 1; Each n is independently 1-6, 1-4, 2-4 or 2 or 3; or A pharmaceutically acceptable salt, solute or polymorph thereof. Additional embodiments are directed to pharmaceutical compositions based upon the disclosed chemical compounds and methods of treating or reducing the likelihood of VZV, HSV-1 or HSV-2 infections.
    Type: Application
    Filed: February 7, 2024
    Publication date: June 20, 2024
    Inventors: Uma Sharan Singh, Chung Chu
  • Patent number: 11945833
    Abstract: In an embodiment, the invention is directed to prodrug compounds of L-BHDU according to the chemical structure I: Where R1 is a —(CH2)n—O—R1a group or a —(CH2)j—O—C(O)Ok—R2a group; R2 is H, a —(CH2)n—O—R1a group or a —(CH2)j—O—C(O)Ok—R2a group; R1a is independently a C6-C30 alkyl group, often a C12-C22 alkyl group, often a C14-C20 alkyl group or a C16-C18 alkyl group, often a C16 or C18 alkyl group; R2a is independently a C1-C12 alkyl group, often a C2-C6 alkyl group, a C3-C4 alkyl group, an isopropyl, t-butyl or sec-butyl group, or an isopropyl or t-butyl group; Each j is independently 1-6, 1-3, often 1 or 2; Each k is 0 or 1; Each n is independently 1-6, 1-4, 2-4 or 2 or 3; or A pharmaceutically acceptable salt, solute or polymorph thereof. Additional embodiments are directed to pharmaceutical compositions based upon the disclosed chemical compounds and methods of treating or reducing the likelihood of VZV, HSV-1 or HSV-2 infections.
    Type: Grant
    Filed: October 28, 2022
    Date of Patent: April 2, 2024
    Assignees: University of Georgia Research Foundation, Inc., Anterogen Co., Ltd.
    Inventors: Uma Sharan Singh, Chung Chu
  • Publication number: 20230167143
    Abstract: In an embodiment, the invention is directed to prodrug compounds of L-BHDU according to the chemical structure I: Where R1 is a —(CH2)n—O—R1a group or a —(CH2)j—O—C(O)Ok—R2a group; R2 is H, a —(CH2)n—O—R1a group or a —(CH2)j—O—C(O)Ok—R2a group; R1a is independently a C6-C30 alkyl group, often a C12-C22 alkyl group, often a C14-C20 alkyl group or a C16-C18 alkyl group, often a C16 or C18 alkyl group; R2a is independently a C1-C12 alkyl group, often a C2-C6 alkyl group, a C3-C4 alkyl group, an isopropyl, t-butyl or sec-butyl group, or an isopropyl or t-butyl group; Each j is independently 1-6, 1-3, often 1 or 2; Each k is 0 or 1; Each n is independently 1-6, 1-4, 2-4 or 2 or 3; or A pharmaceutically acceptable salt, solute or polymorph thereof. Additional embodiments are directed to pharmaceutical compositions based upon the disclosed chemical compounds and methods of treating or reducing the likelihood of VZV, HSV-1 or HSV-2 infections.
    Type: Application
    Filed: October 28, 2022
    Publication date: June 1, 2023
    Inventors: Uma Sharan Singh, Chung Chu
  • Publication number: 20080069090
    Abstract: A data communication apparatus, comprising an interface for enabling communication with a remote entity via a network and a control entity in communication with said interface. The control entity is operative to establish a packet-switched connection with the remote entity through the network and to negotiate with the remote entity using in-band signaling entry into a codec-bypass mode of operation. In this way, a codec-bypass connection, which enhances speech quality, can be established over a packet network, which reduces bandwidth.
    Type: Application
    Filed: November 19, 2007
    Publication date: March 20, 2008
    Inventors: Rafi Rabipour, Chung Chu, Pierre Gendron, William Navarro, Paul Boudreaux
  • Publication number: 20070259843
    Abstract: The present invention describes linking a therapeutic agent to a compound which is known to be naturally concentrated in a tissue affected by, or that is causing, a disease, to create a prodrug for treatment of the disease. Embodiments of the present invention include a new class of carotenoid-linked drugs to treat such blinding retinal disease such as age-related macular degeneration, retinoblastoma, and diabetic macular edema. For example, the present invention comprises a method for the treatment of a disorder of the eye comprising linking a therapeutic agent to a xanthophyll carotenoid to create a prodrug, and administering a therapeutically effective amount of the prodrug to an individual in need of treatment. Provided are prodrugs for treatment of retinoblastoma, cystoid macular edema (CME), exudative age-related macular degeneration (AMD), diabetic retinopathy, diabetic macular edema, or inflammatory disorders.
    Type: Application
    Filed: July 13, 2007
    Publication date: November 8, 2007
    Inventors: Dennis Marcus, Chung Chu
  • Publication number: 20070104114
    Abstract: In a communications network having plural nodes, a first node receives a capability list that has a predefined format and includes plural entries identifying corresponding data processing functions supported by one or more nodes along a communications path of a communications session involving the first node. The first node adds at least one additional entry into the capability list in response to determining that the first node supports a data processing function that is not identified in the capability list.
    Type: Application
    Filed: October 30, 2006
    Publication date: May 10, 2007
    Applicant: Nortel Networks Limited
    Inventors: Chung Chu, Rafi Rabipour
  • Publication number: 20050261320
    Abstract: (?)-(2S,4S)-1-(2-Hydroxymethyl-1,3-dioxolan-4-yl)cytosine (also referred to as (?)-OddC) or its derivative and its use to treat cancer in animals, including humans.
    Type: Application
    Filed: August 22, 2003
    Publication date: November 24, 2005
    Inventors: Chung Chu, Yung-Chi Cheng
  • Publication number: 20050209196
    Abstract: The present invention relates to the use of a dioxolane thymine compound according to the chemical structure of Formula (I): where R1 is H, an acyl group, a C1-C20 alkyl or ether group, a phosphate, diphosphate, triphosphate or phosphodiester group, for use in the treatment of HIV infections which exhibit resistance to 3TC and/or AZT. Preferably, compounds according to the present invention are combined with at least one anti-HIV agent which inhibits HIV by a mechanism other than through the inhibition of thymidine kinase (TK). These agents include those selected from among nucleoside reverse transcriptase inhibitors (NRTI), non-nucloeoside reverse transcriptase inhibitors, protease inhibitors, fusion inhibitors, among others.
    Type: Application
    Filed: December 8, 2003
    Publication date: September 22, 2005
    Inventors: Chung Chu, Raymond Schinazi
  • Publication number: 20050192299
    Abstract: Anti-hepatitis B virus compounds (?)3?-thia-2?,3?-dideoxycytidine, (?)5-fluoro-3?-thia-2?,3?-dideoxycytidine, (±) ?-dioxolane cytosine and (?)-L-B-dioxolane cytosine. A method of treating a patient suffering from hepatitis B virus or preventing hepatitis B virus infection comprising administering to the patient an effective amount of an active compound selected from the group consisting of (a) (?)3?-thia-2?,3?-dideoxycytidine, (b) (±)3?-thia-2?3?-dideoxycytidine, (c) (?)5-fluoro-3?-thia-2?,3?-dideoxcytidine; (d) (±) 5-fluoro-3?-thia-2?3?-dideoxycytidine, (e)(±) ?-dioxolane-cytosine and (f) (?)-L-?-dioxolane cytosine, or a salt or an ester thereof, either alone or in admixture within a diluent.
    Type: Application
    Filed: September 4, 2003
    Publication date: September 1, 2005
    Inventors: Yung-Chi Cheng, Chung Chu, Hea Kim, Kirupathevy Shanmuganathan
  • Publication number: 20050119286
    Abstract: The present invention includes compounds and compositions of ?-halonucleosides, as well as methods to treat HIV, HBV or abnormal cellular proliferation comprising administering said compounds or compositions.
    Type: Application
    Filed: June 24, 2002
    Publication date: June 2, 2005
    Inventors: Michael Otto, Junxing Shi, Chung Chu, Raymond Schinazi, Giuseppe Gumina, Youhoon Chong, Yongseok Choi