Patents by Inventor Wentian Lan

Wentian Lan 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).

  • Process for preparing a photochromic polymeric composition, thus obtained polymeric composition and use thereof
    Patent number: 8277700
    Abstract: The present invention discloses a process for preparing a photochromic polymeric composition, characterized in that the photochromic polymeric composition is prepared by comprising (meth)acrylamide compound in the reaction mixture useful for the preparation of the photochromic polymeric composition. The present invention also relates to the thus obtained polymeric composition, photochromic articles made from said polymeric composition, and use of said polymeric composition for preparing photochromic articles. The photochromic polymeric composition according to the present invention makes the absorption peak of the photochromic dye therein become longer, thus exhibiting a desired grey with a bit bluish green or grey with a bit blue.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: October 2, 2012
    Assignee: Evonik Roehm GmbH
    Inventors: Zhengfeng Zhang, Wentian Lan
  • Process for preparing a photochromic polymeric composition, thus obtained polymeric composition and use thereof
    Publication number: 20120085980
    Abstract: The present invention discloses a process for preparing a photochromic polymeric composition, characterized in that the photochromic polymeric composition is prepared by comprising (meth)acrylamide compound in the reaction mixture useful for the preparation of the photochromic polymeric composition. The present invention also relates to the thus obtained polymeric composition, photochromic articles made from said polymeric composition, and use of said polymeric composition for preparing photochromic articles. The photochromic polymeric composition according to the present invention makes the absorption peak of the photochromic dye therein become longer, thus exhibiting a desired grey with a bit bluish green or grey with a bit blue.
    Type: Application
    Filed: November 20, 2009
    Publication date: April 12, 2012
    Applicant: EVONIK ROEHM GMBH
    Inventors: Zhengfeng ZHANG, Wentian LAN
  • PROCESS FOR PREPARING A PHOTOCHROMIC POLYMERIC COMPOSITION, THUS OBTAINED POLYMERIC COMPOSITION AND USE THEREOF
    Publication number: 20110260125
    Abstract: The present invention discloses a process for preparing a photochromic polymeric composition, characterized in that the photochromic polymeric composition is prepared by comprising (meth) acrylamide compound in the reaction mixture useful for the preparation of the photochromic polymeric composition. The present invention also relates to the thus obtained polymeric composition, photochromic articles made from said polymeric composition, and use of said polymeric composition for preparing photochromic articles. The photochromic polymeric composition according to the present invention makes the absorption peak of the photochromic dye therein become longer, thus exhibiting a desired grey with a bit bluish green or grey with a bit blue.
    Type: Application
    Filed: November 20, 2009
    Publication date: October 27, 2011
    Applicant: EVONIK ROEHM GMBH
    Inventors: Zhengfeng Zhang, Wentian Lan