Patents by Inventor Ella Sun Yu

Ella Sun Yu 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).

  • Heat economy enhancements for the recovery and use of energy obtained from spent cooking liquors
    Patent number: 6176971
    Abstract: Useable steam, e.g. substantially clean useable steam, is produced from a chemical cellulose pulping system hot spent treatment liquor (e.g. black liquor) with optimum energy efficiency by passing the spent liquor to a reboiler, and then pressurizing (e.g. with an eductor, fan, or compressor) the clean steam discharged from the reboiler. The clean steam can be used to steam incoming chips (e.g. in a chip bin) without significantly increasing the TRS load on the pulp mill NCG system.
    Type: Grant
    Filed: November 18, 1998
    Date of Patent: January 23, 2001
    Assignee: Andritz-Ahlstrom Inc.
    Inventors: Ella Sun Yu, C. Bertil Stromberg, Rolf C. Ryham, R. Fred Chasse