Patents by Inventor Ann Chien Chu

Ann Chien Chu 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).

  • IN-SITU GROUNDWATER NITRIFICATION AND DE-NITRIFICATION REMEDIATION SYSTEM
    Publication number: 20090026134
    Abstract: A method of in-situ groundwater nitrification, by: extracting groundwater from the ground; adding oxygen to the extracted groundwater; adding nutrients to the extracted groundwater; and injecting the groundwater back into the ground, wherein the oxygen reacts with in-situ nitrifying bacteria to oxidize ammonia to nitrate, and wherein the nutrients encourage the nitrifying bacteria to grow and reproduce. A method of in-situ groundwater de-nitrification, by: extracting the groundwater from the ground; adding carbon to the extracted groundwater; adding nutrients to the extracted groundwater; and injecting the groundwater back into the ground, wherein the carbon reacts with in-situ de-nitrifying bacteria to reduce nitrate to nitrogen gas, and wherein the nutrients encourage the de-nitrifying bacteria to grow and reproduce.
    Type: Application
    Filed: July 16, 2008
    Publication date: January 29, 2009
    Applicant: UNIVERSITY TECHNOLOGIES INTERNATIONAL
    Inventors: Stephen B. Mailath, Ann Chien Chu
  • In-situ groundwater nitrification and de-nitrification remediation system
    Patent number: 7407583
    Abstract: A method of in-situ groundwater nitrification, by: extracting groundwater from the ground; adding oxygen to the extracted groundwater; adding nutrients to the extracted groundwater; and injecting the groundwater back into the ground, wherein the oxygen reacts with in-situ nitrifying bacteria to oxidize ammonia to nitrate, and wherein the nutrients encourage the nitrifying bacteria to grow and reproduce. A method of in-situ groundwater de-nitrification, by: extracting the groundwater from the ground; adding carbon to the extracted groundwater; adding nutrients to the extracted groundwater; and injecting the groundwater back into the ground, wherein the carbon reacts with in-situ de-nitrifying bacteria to reduce nitrate to nitrogen gas, and wherein the nutrients encourage the de-nitrifying bacteria to grow and reproduce.
    Type: Grant
    Filed: March 25, 2005
    Date of Patent: August 5, 2008
    Assignee: University Technologies International, LLP
    Inventors: Stephen B. Mailath, Ann Chien Chu