Patents by Inventor Jiayu Guan

Jiayu 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).

  • Polypropylene microporous film
    Patent number: 5134174
    Abstract: Polypropylene microporous films characterized by having a porosity of 30-35%, an average pore size of 200-800 Angstroms, a permeation coefficient for nitrogen of 1-5.times.10.sup.-3 ml/cm sec atm and a tensile strength of greater than 60 MPA in all directions within the film plane are prepared by the consecutive steps of biaxial stretching a non-porous starting film of high .beta.-crystal content and heat setting the stretched film.
    Type: Grant
    Filed: October 31, 1991
    Date of Patent: July 28, 1992
    Assignee: Institute of Chemistry, Academia Sinica
    Inventors: Mao Xu, Shiru Hu, Jiayu Guan, Xianming Sun, Wei Wu, Wei Zhu, Xian Zhang, Zimian Ma, Qi Han, Shangqi Liu