Patents by Inventor Jiyun Liu
Jiyun Liu 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).
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Patent number: 11926787Abstract: A well cementing method is described for improving cementing quality by controlling the hydration heat of cement slurry. By controlling the degree and/or rate of hydration heat release from cement slurry, the method improves the hydration heat release during formation of cement with curing of cement slurry, improves the binding quality between the cement and the interfaces, and in turn improves the cementing quality at the open hole section and/or the overlap section. The cementing method improves cementing quality of oil and gas wells and reduces the risk of annular pressure.Type: GrantFiled: April 21, 2020Date of Patent: March 12, 2024Assignees: PetroChina Company Limited, CNPC Engineering Technology R&D Company LimitedInventors: Shuoqiong Liu, Hua Zhang, Jianzhou Jin, Ming Xu, Yongjin Yu, Fengzhong Qi, Congfeng Qu, Hong Yue, Youcheng Zheng, Wei Li, Yong Ma, Youzhi Zheng, Zhao Huang, Jinping Yuan, Zhiwei Ding, Chongfeng Zhou, Chi Zhang, Zishuai Liu, Hongfei Ji, Yuchao Guo, Xiujian Xia, Yong Li, Jiyun Shen, Huiting Liu, Yusi Feng, Bin Lyu
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Publication number: 20230399282Abstract: The present invention is directed to inhibitors of tyrosinase, pharmaceutical compositions comprising such tyrosinase inhibitors, and methods of making and using the same. Specifically, included in the present invention are compositions of matter comprised of at least one 2,4-dihydroxybenzene analog, which inhibit the activity of tyrosinase and which inhibit the overproduction of melanin.Type: ApplicationFiled: August 28, 2023Publication date: December 14, 2023Applicant: Unigen, Inc.Inventors: Sandip K. Nandy, Jiyun Liu, Alexandre Mikhailovitch Nesterov, Carmen Hertel, Abeysinghe Arrachchigae Papmapiya
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Patent number: 11739040Abstract: The present invention is directed to inhibitors of tyrosinase, pharmaceutical compositions comprising such tyrosinase inhibitors, and methods of making and using the same. Specifically, included in the present invention are compositions of matter comprised of at least one 2,4-dihydroxybenzene analog, which inhibit the activity of tyrosinase and which inhibit the overproduction of melanin.Type: GrantFiled: March 8, 2021Date of Patent: August 29, 2023Assignee: Unigen, Inc.Inventors: Sandip K. Nandy, Jiyun Liu, Alexandre Mikhailovitch Nesterov, Carmen Hertel, Abeysinghe Arrachchigae Papmapiya
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Publication number: 20210188751Abstract: The present invention is directed to inhibitors of tyrosinase, pharmaceutical compositions comprising such tyrosinase inhibitors, and methods of making and using the same. Specifically, included in the present invention are compositions of matter comprised of at least one 2,4-dihydroxybenzene analog, which inhibit the activity of tyrosinase and which inhibit the overproduction of melanin.Type: ApplicationFiled: March 8, 2021Publication date: June 24, 2021Applicant: Unigen, Inc.Inventors: Sandip K. Nandy, Jiyun Liu, Alexandre Mikhailovitch Nesterov, Carmen Hertel, Abeysinghe Arrachchigae Papmapiya
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Patent number: 10941098Abstract: The present invention is directed to inhibitors of tyrosinase, pharmaceutical compositions comprising such tyrosinase inhibitors, and methods of making and using the same. Specifically, included in the present invention are compositions of matter comprised of at least one 2,4-dihydroxybenzene analog, which inhibit the activity of tyrosinase and which inhibit the overproduction of melanin.Type: GrantFiled: April 10, 2019Date of Patent: March 9, 2021Assignee: Unigen, Inc.Inventors: Sandip K. Nandy, Jiyun Liu, Alexandre Mikhailovitch Nesterov, Carmen Hertel, Abeysinghe Arrachchigae Papmapiya
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Publication number: 20190233359Abstract: The present invention is directed to inhibitors of tyrosinase, pharmaceutical compositions comprising such tyrosinase inhibitors, and methods of making and using the same. Specifically, included in the present invention are compositions of matter comprised of at least one 2,4-dihydroxybenzene analog, which inhibit the activity of tyrosinase and which inhibit the overproduction of melanin.Type: ApplicationFiled: April 10, 2019Publication date: August 1, 2019Applicant: Unigen, Inc.Inventors: Sandip K. Nandy, Jiyun Liu, Alexandre Mikhailovitch Nesterov, Carmen Hertel, Abeysinghe Arrachchigae Papmapiya
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Patent number: 10259764Abstract: The present invention is directed to inhibitors of tyrosinase, pharmaceutical compositions comprising such tyrosinase inhibitors, and methods of making and using the same. Specifically, included in the present invention are compositions of matter comprised of at least one 2,4-dihydroxybenzene analog, which inhibit the activity of tyrosinase and which inhibit the overproduction of melanin.Type: GrantFiled: June 12, 2017Date of Patent: April 16, 2019Assignee: Unigen, Inc.Inventors: Sandip K. Nandy, Jiyun Liu, Alexandre Mikhailovitch Nesterov, Carmen Hertel, Abeysinghe Arrachchigae Papmapiya
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Publication number: 20170275224Abstract: The present invention is directed to inhibitors of tyrosinase, pharmaceutical compositions comprising such tyrosinase inhibitors, and methods of making and using the same. Specifically, included in the present invention are compositions of matter comprised of at least one 2,4-dihydroxybenzene analog, which inhibit the activity of tyrosinase and which inhibit the overproduction of melanin.Type: ApplicationFiled: June 12, 2017Publication date: September 28, 2017Applicant: Unigen, Inc.Inventors: Sandip K. Nandy, Jiyun Liu, Alexandre Mikhailovitch Nesterov, Carmen Hertel, Abeysinghe Arrachchigae Papmapiya
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Publication number: 20170201870Abstract: The present invention discloses a method and device for message sending by a background program. The method for message sending by a background program comprises: acquiring a connection channel for message sending by a background program; according to a scenario of message sending by the background program, constructing a message to be sent; acquiring an interface for message sending by the background program; uploading the constructed message to the interface for message sending by the background program via the connection channel for message sending by the background program; and sending, by the background program, the message via the interface for message sending by the background program. The embodiment realizes automatic message sending by a background program, without the need for inputting a phone number or message content by a user, and the sending process does not affect the normal operation of the system.Type: ApplicationFiled: June 4, 2015Publication date: July 13, 2017Applicant: Beijing Qihoo Technology Company LimitedInventor: Jiyun Liu
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Patent number: 9682910Abstract: The present invention is directed to inhibitors of tyrosinase, pharmaceutical compositions comprising such tyrosinase inhibitors, and methods of making and using the same. Specifically, included in the present invention are compositions of matter comprised of at least one 2,4-dihydroxybenzene analog, which inhibit the activity of tyrosinase and which inhibit the overproduction of melanin.Type: GrantFiled: June 25, 2015Date of Patent: June 20, 2017Assignee: Unigen, Inc.Inventors: Sandip K. Nandy, Jiyun Liu, Alexandre Mikhailovitch Nesterov, Carmen Hertel, Abeysinghe Arrachchigae Papmapiya
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Publication number: 20160083322Abstract: The present invention is directed to inhibitors of tyrosinase, pharmaceutical compositions comprising such tyrosinase inhibitors, and methods of making and using the same. Specifically, included in the present invention are compositions of matter comprised of at least one 2,4-dihydroxybenzene analog, which inhibit the activity of tyrosinase and which inhibit the overproduction of melanin.Type: ApplicationFiled: June 25, 2015Publication date: March 24, 2016Applicant: Unigen, Inc.Inventors: Sandip K. Nandy, Jiyun Liu, Alexandre Mikhailovitch Nesterov, Carmen Hertel, Abeysinghe Arrachchigae Papmapiya
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Patent number: 9096507Abstract: The present invention is directed to inhibitors of tyrosinase, pharmaceutical compositions comprising such tyrosinase inhibitors, and methods of making and using the same. Specifically, included in the present invention are compositions of matter comprised of at least one 2,4-dihydroxybenzene analog, which inhibit the activity of tyrosinase and which inhibit the overproduction of melanin.Type: GrantFiled: January 13, 2014Date of Patent: August 4, 2015Assignee: Unigen, Inc.Inventors: Sandip K. Nandy, Jiyun Liu, Alexandre Mikhailovitch Nesterov, Carmen Hertel, Abeysinghe A. Padmapriya
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Publication number: 20140363388Abstract: The present invention is directed to inhibitors of tyrosinase, pharmaceutical compositions comprising such tyrosinase inhibitors, and methods of making and using the same. Specifically, included in the present invention are compositions of matter comprised of at least one 2,4-dihydroxybenzene analog, which inhibit the activity of tyrosinase and which inhibit the overproduction of melanin.Type: ApplicationFiled: January 13, 2014Publication date: December 11, 2014Applicant: UNIGEN, INC.Inventors: Sandip K. Nandy, Jiyun Liu, Alexandre Mikhailovitch Nesterov, Carmen Hertel, Abeysinghe A. Padmapriya
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Patent number: 8658838Abstract: The present invention is directed to inhibitors of tyrosinase, pharmaceutical compositions comprising such tyrosinase inhibitors, and methods of making and using the same. Specifically, included in the present invention are compositions of matter comprised of at least one 2,4-dihydroxybenzene analog, which inhibit the activity of tyrosinase and which inhibit the overproduction of melanin.Type: GrantFiled: December 20, 2012Date of Patent: February 25, 2014Assignee: Unigen, Inc.Inventors: Sandip K. Nandy, Jiyun Liu, Alexandre Mikhailovitch Nesterov, Carmen Hertel, Abeysinghe A. Padmapriya
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Patent number: 8362305Abstract: The present invention is directed to inhibitors of tyrosinase, pharmaceutical compositions comprising such tyrosinase inhibitors, and methods of making and using the same. Specifically, included in the present invention are compositions of matter comprised of at least one 2,4-dihydroxybenzene analog, which inhibit the activity of tyrosinase and which inhibit the overproduction of melanin.Type: GrantFiled: July 21, 2009Date of Patent: January 29, 2013Assignee: Unigen, Inc.Inventors: Sandip K. Nandy, Jiyun Liu, Alexandre Mikhailovitch Nesterov, Carmen Hertel, Abeysinghe A. Padmapriya
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Publication number: 20100016347Abstract: The present invention is directed to inhibitors of tyrosinase, pharmaceutical compositions comprising such tyrosinase inhibitors, and methods of making and using the same. Specifically, included in the present invention are compositions of matter comprised of at least one 2,4-dihydroxybenzene analog, which inhibit the activity of tyrosinase and which inhibit the overproduction of melanin.Type: ApplicationFiled: July 21, 2009Publication date: January 21, 2010Applicant: Unigen Pharmaceuticals, Inc.Inventors: Sandip K. Nandy, Jiyun Liu, Alexandre Mikhailovitch Nesterov, Carmen Hertel, Abeysinghe A. Padmapriya