Patents by Inventor Lanhua Hu

Lanhua Hu 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).

  • Use of fluorescent polymers in marking compositions for the diagnostic determination of cleaning performance
    Patent number: 11344646
    Abstract: The present invention generally relates to fluorescent marking compositions and their use to determine whether a surface has been cleaned. More particularly, the marking compositions comprise fluorescent polymers.
    Type: Grant
    Filed: April 1, 2021
    Date of Patent: May 31, 2022
    Assignee: ECOLAB USA INC.
    Inventors: Joseph Wegner, Erin Brown, Jeffery Atkins, Paul Zinn, Robert Walicki, Lanhua Hu
  • USE OF FLUORESCENT POLYMERS IN MARKING COMPOSITIONS FOR THE DIAGNOSTIC DETERMINATION OF CLEANING PERFORMANCE
    Publication number: 20210275710
    Abstract: The present invention generally relates to fluorescent marking compositions and their use to determine whether a surface has been cleaned. More particularly, the marking compositions comprise fluorescent polymers.
    Type: Application
    Filed: April 1, 2021
    Publication date: September 9, 2021
    Inventors: Joseph Wegner, Erin Brown, Jeffery Atkins, Paul Zinn, Robert Walicki, Lanhua Hu
  • Method for off-line cleaning of cooling towers
    Patent number: 11085010
    Abstract: A method of cleaning a cooling water system is disclosed. The method may include contacting a cooling tower fill with a composition that may include a surfactant and an additive selected from an oxidizing agent, an acid, and any combination thereof when the cooling water system is off-line. The method may include contacting a deposit in the cooling tower fill with the composition. The oxidizing agent may be hydrogen peroxide, sodium hypochlorite, chlorine dioxide, ozone, sodium hypobromite, sodium or potassium permanganate, or any combination thereof. The surfactant may include a C8-C10 alkyl polyglycoside and a C10-C18 alkyl polyglycoside.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: August 10, 2021
    Assignee: ECOLAB USA INC.
    Inventors: Lanhua Hu, Amit Gupta
  • Use of fluorescent polymers in marking compositions for the diagnostic determination of cleaning performance
    Patent number: 10994041
    Abstract: The present invention generally relates to fluorescent marking compositions and their use to determine whether a surface has been cleaned. More particularly, the marking compositions comprise fluorescent polymers.
    Type: Grant
    Filed: July 13, 2020
    Date of Patent: May 4, 2021
    Assignee: Ecolab USA Inc.
    Inventors: Joseph Wegner, Erin Brown, Jeffery Atkins, Paul Zinn, Robert Walicki, Lanhua Hu
  • USE OF FLUORESCENT POLYMERS IN MARKING COMPOSITIONS FOR THE DIAGNOSTIC DETERMINATION OF CLEANING PERFORMANCE
    Publication number: 20210000994
    Abstract: The present invention generally relates to fluorescent marking compositions and their use to determine whether a surface has been cleaned. More particularly, the marking compositions comprise fluorescent polymers.
    Type: Application
    Filed: July 13, 2020
    Publication date: January 7, 2021
    Inventors: Joseph Wegner, Erin Brown, Jeffery Atkins, Paul Zinn, Robert Walicki, Lanhua Hu
  • Use of fluorescent polymers in marking compositions for the diagnostic determination of cleaning performance
    Patent number: 10751438
    Abstract: The present invention generally relates to fluorescent marking compositions and their use to determine whether a surface has been cleaned. More particularly, the marking compositions comprise fluorescent polymers.
    Type: Grant
    Filed: September 19, 2019
    Date of Patent: August 25, 2020
    Assignee: Ecolab USA Inc.
    Inventors: Joseph Wegner, Erin Brown, Jeffery Atkins, Paul Zinn, Robert Walicki, Lanhua Hu
  • USE OF FLUORESCENT POLYMERS IN MARKING COMPOSITIONS FOR THE DIAGNOSTIC DETERMINATION OF CLEANING PERFORMANCE
    Publication number: 20200085986
    Abstract: The present invention generally relates to fluorescent marking compositions and their use to determine whether a surface has been cleaned. More particularly, the marking compositions comprise fluorescent polymers.
    Type: Application
    Filed: September 19, 2019
    Publication date: March 19, 2020
    Inventors: Joseph Wegner, Erin Brown, Jeffery Atkins, Paul Zinn, Robert Walicki, Lanhua Hu
  • Use of fluorescent polymers in marking compositions for the diagnostic determination of cleaning performance
    Patent number: 10463756
    Abstract: The present invention generally relates to fluorescent marking compositions and their use to determine whether a surface has been cleaned. More particularly, the marking compositions comprise fluorescent polymers.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: November 5, 2019
    Assignee: Ecolab USA Inc.
    Inventors: Joseph Wegner, Erin Brown, Jeffery Atkins, Paul Zinn, Robert Walicki, Lanhua Hu
  • USE OF FLUORESCENT POLYMERS IN MARKING COMPOSITIONS FOR THE DIAGNOSTIC DETERMINATION OF CLEANING PERFORMANCE
    Publication number: 20190117814
    Abstract: The present invention generally relates to fluorescent marking compositions and their use to determine whether a surface has been cleaned. More particularly, the marking compositions comprise fluorescent polymers.
    Type: Application
    Filed: October 24, 2018
    Publication date: April 25, 2019
    Inventors: Joseph Wegner, Erin Brown, Jeffery Atkins, Paul Zinn, Robert Walicki, Lanhua Hu
  • METHOD FOR OFF-LINE CLEANING OF COOLING TOWERS
    Publication number: 20190055502
    Abstract: A method of cleaning a cooling water system is disclosed. The method may include contacting a cooling tower fill with a composition that may include a surfactant and an additive selected from an oxidizing agent, an acid, and any combination thereof when the cooling water system is off-line. The method may include contacting a deposit in the cooling tower fill with the composition. The oxidizing agent may be hydrogen peroxide, sodium hypochlorite, chlorine dioxide, ozone, sodium hypobromite, sodium or potassium permanganate, or any combination thereof. The surfactant may include a C8-C10 alkyl polyglycoside and a C10-C18 alkyl polyglycoside.
    Type: Application
    Filed: August 14, 2018
    Publication date: February 21, 2019
    Applicant: ECOLAB USA, Inc.
    Inventors: Lanhua Hu, Amit Gupta
  • Use of fluorescent polymers in marking compositions for the diagnostic determination of cleaning performance
    Patent number: 10155058
    Abstract: The present invention generally relates to fluorescent marking compositions and their use to determine whether a surface has been cleaned. More particularly, the marking compositions comprise fluorescent polymers.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: December 18, 2018
    Assignee: Ecolab USA Inc.
    Inventors: Joseph Wegner, Erin Brown, Jeffery Atkins, Paul Zinn, Robert Walicki, Lanhua Hu
  • USE OF FLUORESCENT POLYMERS IN MARKING COMPOSITIONS FOR THE DIAGNOSTIC DETERMINATION OF CLEANING PERFORMANCE
    Publication number: 20180085483
    Abstract: The present invention generally relates to fluorescent marking compositions and their use to determine whether a surface has been cleaned. More particularly, the marking compositions comprise fluorescent polymers.
    Type: Application
    Filed: December 1, 2017
    Publication date: March 29, 2018
    Inventors: Joseph Wegner, Erin Brown, Jeffery Atkins, Paul Zinn, Robert Walicki, Lanhua Hu
  • Use of fluorescent polymers in marking compositions for the diagnostic determination of cleaning performance
    Patent number: 9867895
    Abstract: The present invention generally relates to fluorescent marking compositions and their use to determine whether a surface has been cleaned. More particularly, the marking compositions comprise fluorescent polymers.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: January 16, 2018
    Assignee: Ecolab USA Inc.
    Inventors: Joseph Wegner, Erin Brown, Jeffery Atkins, Paul Zinn, Robert Walicki, Lanhua Hu
  • USE OF FLUORESCENT POLYMERS IN MARKING COMPOSITIONS FOR THE DIAGNOSTIC DETERMINATION OF CLEANING PERFORMANCE
    Publication number: 20170182197
    Abstract: The present invention generally relates to fluorescent marking compositions and their use to determine whether a surface has been cleaned. More particularly, the marking compositions comprise fluorescent polymers.
    Type: Application
    Filed: March 13, 2017
    Publication date: June 29, 2017
    Inventors: Joseph Wegner, Erin Brown, Jeffery Atkins, Paul Zinn, Robert Walicki, Lanhua Hu
  • Use of fluorescent polymers in marking compositions for the diagnostic determination of cleaning performance
    Patent number: 9624423
    Abstract: The present invention generally relates to fluorescent marking compositions and their use to determine whether a surface has been cleaned. More particularly, the marking compositions comprise fluorescent polymers.
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: April 18, 2017
    Assignee: Ecolab USA Inc.
    Inventors: Joseph Wegner, Erin Brown, Jeffery Atkins, Paul Zinn, Robert Walicki, Lanhua Hu
  • USE OF FLUORESCENT POLYMERS IN MARKING COMPOSITIONS FOR THE DIAGNOSTIC DETERMINATION OF CLEANING PERFORMANCE
    Publication number: 20160002525
    Abstract: The present invention generally relates to fluorescent marking compositions and their use to determine whether a surface has been cleaned. More particularly, the marking compositions comprise fluorescent polymers.
    Type: Application
    Filed: July 1, 2014
    Publication date: January 7, 2016
    Inventors: Joseph Wegner, Erin Brown, Jeffery Atkins, Paul Zinn, Robert Walicki, Lanhua Hu