Patents by Inventor Xuejun Lao

Xuejun Lao 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).

  • Preparing Method for Xanthophyll Crystals with Higher Content of Zeaxanthin from Plant Oleoresin
    Publication number: 20120296126
    Abstract: The invention makes public a preparing method for xanthophyll crystals with higher content of zeaxanthin from plant oleoresin. The current methods generally are to get quite pure crystal forms of xanthophyll or zeaxanthin, and they refer to several separation steps.
    Type: Application
    Filed: March 18, 2010
    Publication date: November 22, 2012
    Applicant: ZHEJIANG MEDICINE CO, LTD. XINCHANG PHARMACEUTICAL FACTORY
    Inventors: Xinde Xu, Bin Shao, Hongjuan Chao, Xuejun Lao, Xiaoxia Sun
  • Method of manufacturing 1-chloro-2-methyl-4-acyloxy-2-butene derivatives
    Patent number: 7351854
    Abstract: 1-Chloro-2-methyl-4-acyloxy-2-butene derivatives can be synthesized in good yields and high purity starting from isoprene and employing a chlorohydrin formation reaction in a system made of N-chloroisocyanuric acid derivatives and water, followed by esterification and rearrangement of the crude product mixture.
    Type: Grant
    Filed: May 17, 2007
    Date of Patent: April 1, 2008
    Assignees: Shaoxing University, Zhejiang Medicine Co., Ltd. Xinchang Pharmaceutical Factory
    Inventors: Runpu Shen, Guoqi Yu, Weidong Ye, Kui Wang, Xuejun Lao
  • METHOD OF MANUFACTURING 1-CHLORO-2-METHYL-4-ACYLOXY-2-BUTENE DERIVATIVES
    Publication number: 20070270607
    Abstract: 1-Chloro-2-methyl-4-acyloxy-2-butene derivatives can be synthesized in good yields and high purity starting from isoprene and employing a chlorohydrin formation reaction in a system made of N-chloroisocyanuric acid derivatives and water, followed by esterification and rearrangement of the crude product mixture.
    Type: Application
    Filed: May 17, 2007
    Publication date: November 22, 2007
    Applicants: SHAOXING UNIVERSITY, ZHEJIANG MEDICINE CO., LTD., XINCHANG PHARMACEUTICAL FACTORY
    Inventors: Runpu SHEN, Guoqi YU, Weidong YE, Kui WANG, Xuejun LAO