Patents by Inventor Ronald H. Leng

Ronald H. Leng 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 to produce polycarbamate using a gradient feed of urea
    Patent number: 9683082
    Abstract: A process to produce polycarbamate comprising providing urea in liquid form; and adding the urea in liquid form to a polyol in a reduced gradient profile to form polycarbamate product is provided. Also provided are: (a) a reaction product of the process and (b) an apparatus for operating the process.
    Type: Grant
    Filed: July 28, 2014
    Date of Patent: June 20, 2017
    Assignee: Dow Global Technologies LLC
    Inventors: Xinrui Yu, Yiyong He, Ronald H. Leng
  • PROCESS TO PRODUCE POLYCARBAMATE USING A GRADIENT FEED OF UREA
    Publication number: 20160177033
    Abstract: A process to produce polycarbamate comprising providing urea in liquid form; and adding the urea in liquid form to a polyol in a reduced gradient profile to form polycarbamate product is provided. Also provided are: (a) a reaction product of the process and (b) an apparatus for operating the process.
    Type: Application
    Filed: July 28, 2014
    Publication date: June 23, 2016
    Inventors: Xinrui Yu, Yiyong He, Ronald H. Leng