Patents by Inventor Lianyu Wen

Lianyu Wen 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).

  • Coat-nitrocarburizing of irons and steels
    Patent number: 5252146
    Abstract: A process for nitrocarburizing ferrous materials, and the product thereof is described. Material to be treated is packed in a container with a triazine polymer, preferably melone, melem or melam and heated to 500.degree.-900.degree. C. for up to 120 minutes. After treatment the material can be oil quenched to produce a product having a diffusion layer and or a relatively thick hard nitrocarburized (outer) layer which is 40-200 3/4m thick and has a hardness in the range HV 400-1500.
    Type: Grant
    Filed: August 24, 1992
    Date of Patent: October 12, 1993
    Assignee: Queen's University
    Inventors: Lianyu Wen, Jiwei Shi, Reginald W. Smith