Patents by Inventor Sirkku HANSKI

Sirkku HANSKI 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).

  • Charge developing polymer compositions and methods of use for for enhanced oil recovery
    Patent number: 11879095
    Abstract: The present embodiments generally relate to methods and compositions comprising one or more polymers which gradually increase in charge, thereby providing for an increase in viscosity in an aqueous solution or aqueous composition, such as when present in a desired aqueous environment. Use of such compositions and methods comprising one or more polymers which gradually increase in charge, thereby providing for an increase in viscosity in an aqueous solution or aqueous composition during enhanced oil recovery may result in an increase in oil production relative to methods and/or compositions which do not comprise one or more polymers which gradually increase in charge, thereby providing for an increase in viscosity in an aqueous solution or aqueous composition.
    Type: Grant
    Filed: September 17, 2019
    Date of Patent: January 23, 2024
    Assignee: KEMIRA OYJ
    Inventors: Leena Nurmi, Sirkku Hanski, Susanna Toivonen, Louis Rosati
  • METHODS AND COMPOSITIONS FOR ENHANCED OIL RECOVERY
    Publication number: 20210348049
    Abstract: The present embodiments generally relate to methods and compositions comprising one or more polymers which gradually increase in charge, thereby providing for an increase in viscosity in an aqueous solution or aqueous composition, such as when present in a desired aqueous environment. Use of such compositions and methods comprising one or more polymers which gradually increase in charge, thereby providing for an increase in viscosity in an aqueous solution or aqueous composition during enhanced oil recovery may result in an increase in oil production relative to methods and/or compositions which do not comprise one or more polymers which gradually increase in charge, thereby providing for an increase in viscosity in an aqueous solution or aqueous composition.
    Type: Application
    Filed: September 17, 2019
    Publication date: November 11, 2021
    Inventors: Leena NURMI, Sirkku HANSKI, Susanna TOIVONEN, Louis ROSATI