Patents by Inventor Xiao-Pei Guan

Xiao-Pei Guan 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: 20240094198
    Abstract: The invention is directed to a method for detecting a target moiety in a sample of biological specimens by the steps a) providing at least one conjugate with the general formula (I) Xn— P—Ym, with X is a detection moiety, P an acidic or basic degradable spacer and Y an antigen or oligonucleotide recognizing moiety and n, m are integers between 1 and 100 and wherein X and Y are covalently bound to P, b) binding the conjugate to the target moiety target via the antigen or oligonucleotide recognizing moiety Y, thereby labelling the target moiety, c) detecting the target moiety labelled with the conjugate by detecting the detecting moiety X, d) providing at least one precursor which is capable of releasing an acid or base when provided with radiation wherein the acid or base is capable of cleaving P, e) activating the precursor by providing radiation, thereby releasing the acid or base capable of cleaving P, and f) degrading spacer P with the released acid or base, thereby cleaving the detection moiety X from
    Type: Application
    Filed: September 18, 2023
    Publication date: March 21, 2024
    Inventors: Michel Perbost, Sameh Soliman, Xiao-Pei Guan, Mong Sano Marma
  • Patent number: 11767339
    Abstract: The invention is directed to a method for production of a deoxynucleotide triphosphate according to general formula (7) wherein B is a nucleobase and R is an alkyl group having 1 to 4 carbon atoms and n is an integer from 1 to 10 by reaction of reaction precursor of compound 6 wherein R1, R2 and R3 are independently H, O-Alkyl with alkyl residues having 1 to 4 carbon atoms or halogen and n is an integer from 1 to 10 with dialkyl(alkylthio)sulfonium salt (8B) wherein R4, R5 R6 are independently alkyl residues having 1 to 4 carbon atoms and X is selected from the group consisting of BF4?, F?, Cl?, Br?, I?, SO42?, SO32? in aqueous solution having a pH between 3 and 7.
    Type: Grant
    Filed: January 13, 2022
    Date of Patent: September 26, 2023
    Assignee: Miltenyi Biotech B.V. & Co. KG
    Inventors: Mong Sano Marma, Michel Perbost, Sameh Soliman, Xiao-Pei Guan
  • Publication number: 20230101711
    Abstract: The invention is directed to a method for detecting RNA, DNA or protein target sequences by a) Hybridizing a library of probes having the general formula (I) P—(CL-D)x??(I) ?With P: probes having at least 10 nucleotides or amino acids CL: cleavable linker D: fluorescent dye X: integer between 1 and 5 ?to RNA, DNA or protein target sequences wherein the library comprises probes P having different sequences of nucleotides or amino acids and cleavable linkers CL of different groups which are cleavable with different means b) Removing unhybridized probes and detecting the hybridized probes via the fluorophores D by a first image c) Cleaving sequentially by different means each group of chemical linkers CL from the hybridized probes; removing the thus cleaved fluorophores D and detecting the remaining hybridized probes via their fluorophores D by a second image d) Detecting the removed fluorophores D by comparing the first and second image.
    Type: Application
    Filed: September 26, 2022
    Publication date: March 30, 2023
    Inventors: Mong Sano, Michel Perbost, Robert Pinard, Xiao-Pei Guan, Sameh Soliman, Emily Neil
  • Publication number: 20230014428
    Abstract: The invention is directed to a method for production of a deoxynucleotide triphosphate according to general formula (7) wherein B is a nucleobase and R is an alkyl group having 1 to 4 carbon atoms and n is an integer from 1 to 10 by reaction of reaction precursor of compound 6 wherein R1, R2 and R3 are independently H, O-Alkyl with alkyl residues having 1 to 4 carbon atoms or halogen and n is an integer from 1 to 10 with dialkyl(alkylthio)sulfonium salt (8B) wherein R4, R5 R6 are independently alkyl residues having 1 to 4 carbon atoms and X is selected from the group consisting of BF4?, F?, Cl?, Br?, I?, SO42?, SO32? in aqueous solution having a pH between 3 and 7.
    Type: Application
    Filed: January 13, 2022
    Publication date: January 19, 2023
    Applicant: Miltenyi Biotec B.V. & Co. KG
    Inventors: Mong Sano MARMA, Sameh Soliman, Michel PERBOST, Xiao-Pei GUAN
  • Patent number: 6562985
    Abstract: This invention involves a new class of compounds, certain geminal-dinitro-substituted heterocycles, including geminal-bis(difluoramino)-substituted heterocyclic nitramines and the production thereof. More specifically, this invention involves the production of 3,3-bis(difluoramino)octahydro-1,5,7,7-tetranitro-1,5-diazocine (TNFX), which may be formulated into explosives and propellant oxidizers. The method of making a 3,3-bis(difluoramino)octahydro-1,5,7,7-tetranitro-1,5-diazocine comprises reacting a hexahydro-7,7-dinitro-1,5-bis(nitrobenzenesulfonyl)-1,5-diazocin-3(2 H)-one with a difluoramine source to produce a 3,3-bis(difluoramino)octahydro-7,7-dinitro-1,5-bis(nitrobenzenesulfonyl)-1,5-diazocine and reacting said 3,3-bis(difluoramino)octahydro-7,7-dinitro-1,5-bis(nitrobenzenesulfonyl)-1,5-diazocine with a highly reactive nitrating reagent in the presence of a strong Lewis acid, such as antimony pentafluoride, boron triflate or boron fluorosulfonate.
    Type: Grant
    Filed: June 3, 2002
    Date of Patent: May 13, 2003
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Robert Dale Chapman, Theodore Axenrod, Jianguang Sun, Xiao-Pei Guan, Lida Qi
  • Publication number: 20020161248
    Abstract: This invention involves a new class of compounds, certain geminal-dinitro-substituted heterocycles, including geminal-bis(difluoramino)-substituted heterocyclic nitramines and the production thereof. More specifically, this invention involves the production of 3,3-bis(difluoramino)octahydro-1,5,7,7-tetranitro-1,5-diazocine (TNFX), which may be formulated into explosives and propellant oxidizers. The method of making a 3,3-bis(difluoramino)octahydro-1,5,7,7-tetranitro-1,5-diazocine comprises reacting a hexahydro-7,7-dinitro-1,5-bis(nitrobenzenesulfonyl)-1,5-diazocin-3(2 H)-one with a difluoramine source to produce a 3,3-bis(difluoramino)octahydro-7,7-dinitro-1,5-bis(nitrobenzenesulfonyl)-1,5-diazocine and reacting said 3,3-bis(difluoramino)octahydro-7,7-dinitro-1,5-bis(nitrobenzenesulfonyl)-1,5-diazocine with a highly reactive nitrating reagent in the presence of a strong Lewis acid, such as antimony pentafluoride, boron triflate or boron fluorosulfonate.
    Type: Application
    Filed: June 3, 2002
    Publication date: October 31, 2002
    Inventors: Robert Dale Chapman, Theodore Axenrod, Jianguang Sun, Xiao-Pei Guan, Lida Qi
  • Patent number: 6417355
    Abstract: This invention involves a new class of compounds, certain geminal-dinitro-substituted heterocycles, including geminal-bis(difluoramino)-substituted heterocyclic nitramines and the production thereof. More specifically, this invention involves the production of 3,3-bis(difluoramino)octahydro-1,5,7,7-tetranitro-1,5-diazocine (TNFX), which may be formulated into explosives and propellant oxidizers. The method of making a 3,3-bis(difluoramino)octahydro-1,5,7,7-tetranitro-1,5-diazocine comprises reacting a hexahydro-7,7-dinitro-1,5-bis(nitrobenzenesulfonyl)-1,5-diazocin-3(2H)-one with a difluoramine source to produce a 3,3-bis(difluoramino)octahydro-7,7-dinitro-1,5-bis(nitrobenzenesulfonyl)-1,5-diazocine and reacting said 3,3-bis(difluoramino)octahydro-7,7-dinitro-1,5-bis(nitrobenzenesulfonyl)-1,5-diazocine with a highly reactive nitrating reagent in the presence of a strong Lewis acid, such as antimony pentafluoride, boron triflate or boron fluorosulfonate.
    Type: Grant
    Filed: April 11, 2001
    Date of Patent: July 9, 2002
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Robert Dale Chapman, Theodore Axenrod, Jianguang Sun, Xiao-Pei Guan, Lida Qi