Patents by Inventor Huang Duan

Huang Duan 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).

  • Publication number: 20240162682
    Abstract: An external cavity tunable laser includes a gain median module to generate a broadband optical spectrum covering a predetermined wavelength range; a collimate lens turning a diverging beam into a collimated beam; a pair of etalons to tune frequency; an actuator to adjust an external cavity optical pathlength; a bandpass filter to block one or more frequencies outside the predetermined wavelength range; a beam splitter to split a percentage of the beam to a photodetector; a reflection mirror for feedback to gain median waveguide; an isolator for preventing reflecting light back to the external cavity; and a hermetically sealed housing less than 0.15 cubic centimeters.
    Type: Application
    Filed: November 15, 2022
    Publication date: May 16, 2024
    Inventors: Zhigang Zhou, Kevin Boyd, Guang-Hua Duan, Min Huang, Zhenming Xie, Rihao Li, Qiang Liu, Huixian Wen, Jianguo Wang
  • Patent number: 10098377
    Abstract: Disclosed are a process and an apparatus for improving tobacco raw material. The process mainly comprises performing an extraction from at least one of tobacco leafs, tobacco flakes, tobacco powder, stalks and cut stems by mixed solvents, conducting a solid-liquid separation for the tobacco raw material, applying the extract liquor of tobacco leaves, flakes and cuts for manufacturing tobacco extract and that of stalks and cut stems for manufacturing fertilizer, diluting and mixing a given amount of tobacco aqueous extract and ethanol extract and removing harmful components so as to get feed liquid, backfilling the feed liquid to the tobacco raw material, and drying the tobacco raw material to a certain dryness to obtain the products. The apparatus is a system composed of a plurality of interconnected independent devices such as extractor, solid-liquid separator, a feed liquid backfiller, etc.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: October 16, 2018
    Assignee: Shanghai Juhua Science and Technology Co., Ltd.
    Inventors: Huang Duan, Xuesong Pan, Bin Liu, Jian Chen, Hongming Wang
  • Publication number: 20170013871
    Abstract: Disclosed are a process and an apparatus for improving tobacco raw material. The process mainly comprises performing an extraction from at least one of tobacco leafs, tobacco flakes, tobacco powder, stalks and cut stems by mixed solvents, conducting a solid-liquid separation for the tobacco raw material, applying the extract liquor of tobacco leaves, flakes and cuts for manufacturing tobacco extract and that of stalks and cut stems for manufacturing fertilizer, diluting and mixing a given amount of tobacco aqueous extract and ethanol extract and removing harmful components so as to get feed liquid, backfilling the feed liquid to the tobacco raw material, and drying the tobacco raw material to a certain dryness to obtain the products. The apparatus is a system composed of a plurality of interconnected independent devices such as extractor, solid-liquid separator, a feed liquid backfiller, etc.
    Type: Application
    Filed: September 27, 2016
    Publication date: January 19, 2017
    Inventors: Huang Duan, Xuesong Pan, Bin Liu, Jian Chen, Hongming Wang
  • Patent number: 9480283
    Abstract: Disclosed are a process and an apparatus for improving tobacco raw material. The process mainly comprises performing an extraction from at least one of tobacco leafs, tobacco flakes, tobacco powder, stalks and cut stems by mixed solvents, conducting a solid-liquid separation for the tobacco raw material, applying the extract liquor of tobacco leaves, flakes and cuts for manufacturing tobacco extract and that of stalks and cut stems for manufacturing fertilizer, diluting and mixing a given amount of tobacco aqueous extract and ethanol extract and removing harmful components so as to get feed liquid, backfilling the feed liquid to the tobacco raw material, and drying the tobacco raw material to a certain dryness to obtain the products. The apparatus is a system composed of a plurality of interconnected independent devices such as extractor, solid-liquid separator, a feed liquid backfiller, etc.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: November 1, 2016
    Assignee: SHANGHAI JUHUA SCIENCE AND TECHNOLOGY CO., LTD.
    Inventors: Huang Duan, Xuesong Pan, Bin Liu, Jian Chen, Hongming Wang
  • Publication number: 20140190500
    Abstract: Disclosed are a process and an apparatus for improving tobacco raw material. The process mainly comprises performing an extraction from at least one of tobacco leafs, tobacco flakes, tobacco powder, stalks and cut stems by mixed solvents, conducting a solid-liquid separation for the tobacco raw material, applying the extract liquor of tobacco leaves, flakes and cuts for manufacturing tobacco extract and that of stalks and cut stems for manufacturing fertilizer, diluting and mixing a given amount of tobacco aqueous extract and ethanol extract and removing harmful components so as to get feed liquid, backfilling the feed liquid to the tobacco raw material, and drying the tobacco raw material to a certain dryness to obtain the products. The apparatus is a system composed of a plurality of interconnected independent devices such as extractor, solid-liquid separator, a feed liquid backfiller, etc.
    Type: Application
    Filed: January 14, 2013
    Publication date: July 10, 2014
    Applicant: Shanghai Juhua Science and Technology Co., Ltd.
    Inventors: Huang Duan, Xuesong Pan, Bin Liu, Jian Chen, Hongming Wang