Patents by Inventor Xu Xiucheng

Xu Xiucheng 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).

  • Controlled release fertilizer and preparations thereof
    Patent number: 5849060
    Abstract: The present invention relates to a controlled release fertilizer having water-soluble fertilizers as nucleus and limited-soluble plant nutrient compounds as coating layers, characterized in that more than two coating layers of limited-soluble compounds are formed around the nucleus, and that the release rates of the fertilizer can be controlled by regulating the solubilities of the limited-soluble compounds. The invention also relates to a process for preparing the controlled release fertilizer.
    Type: Grant
    Filed: August 9, 1996
    Date of Patent: December 15, 1998
    Assignee: Zhengzhou Centre of Popularization & Research on Zhengzhou Luxuriance Phosphate & Compound Fertilizer
    Inventors: Li Diping, Wang Haobin, Xu Xiucheng, Hou Cuihong