Patents by Inventor Roy Cheng

Roy Cheng 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: 20210047570
    Abstract: A non-aqueous extraction (NAE) process for producing bitumen from oil sands ore can include a multistage bitumen extraction step where paraffinic solvent and deasphalted oil are added at a downstream stage of extraction at solvent-to-bitumen ratios below asphaltene precipitation onset threshold to remove bitumen from the solid mineral material, while the ore is added to a first stage to mix with the solvent-bitumen mixture and produce solvent diluted bitumen. The process includes recovering the solvent diluted bitumen and the solvent diluted tailings from the extraction step. The solvent diluted bitumen is subjected to deasphalting to produce solvent diluted deasphalted bitumen that is used as a source of the paraffinic solvent and deasphalted oil supplied to extraction. The tailings and asphaltene fraction from deasphalting can be subjected to washing and the washed material can then be subjected to sand solvent recovery.
    Type: Application
    Filed: August 14, 2020
    Publication date: February 18, 2021
    Inventors: Kasra Nikooyeh, Richard McFarlane, John Bleile, Ali Abbaspour, Roy Cheng, Iftikhar Huq, Brian Doucette
  • Patent number: D726550
    Type: Grant
    Filed: January 27, 2014
    Date of Patent: April 14, 2015
    Inventor: Roy Cheng-Chen Lu