Patents Assigned to York Potash Ltd.
  • Composite fertiliser systems
    Patent number: 11999665
    Abstract: A fertiliser pellet comprising: a first region of a nitrogen-providing fertiliser composition; and a second region adhered to the exterior of the first region, the second region comprising a fertiliser composition capable of providing (a) two or more alkali metal and/or alkaline earth metal nutrients and (b) sulphur.
    Type: Grant
    Filed: January 7, 2021
    Date of Patent: June 4, 2024
    Assignee: YORK POTASH LTD
    Inventors: Robert John Meakin, Timothy David Lewis
  • Forming evaporite mineral products and their use as fertiliser
    Patent number: 11447426
    Abstract: A method for separating a particulate stream of an evaporite mineral feedstock, the method comprising passing the stream to an air classifier configured to separate the particulate stream into a fine component and a coarse component.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: September 20, 2022
    Assignee: York Potash LTD
    Inventor: Karl Houseley
  • Pelletising process using starch
    Patent number: 11028025
    Abstract: A method for manufacturing a pelletised mineral product, the method comprising: in a first mixing step, forming a first mixture by mixing the evaporite mineral with non-gelatinised starch under conditions that are insufficient to substantially gelatinise the starch; in a second mixing step, forming a second mixture by mixing the first mixture under conditions that are sufficient to substantially gelatinise the starch comprised within the first mixture; and forming the second mixture into pellets.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: June 8, 2021
    Assignee: York Potash Ltd
    Inventors: Steve Farnworth, Mike Evans, Jim Evans
  • Forming evaporite mineral products and their use as fertiliser
    Patent number: 11001538
    Abstract: A method for forming a powder from an evaporite mineral feedstock, the feedstock comprising at least 50% by mass of particles having a diameter exceeding 10 mm, the method comprising introducing the feedstock to a high pressure grinding roll press configured so as to generate an output 40% or more of which by mass has a diameter less than 400 ?m.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: May 11, 2021
    Assignee: YORK POTASH LTD
    Inventor: Karl Houseley
  • Forming evaporite mineral products and their use as fertiliser
    Patent number: 10899679
    Abstract: A method for forming pellets of an evaporite mineral, the method comprising: exposing starch to water at greater than 70° C. so as to at least partially gel the starch; while the gelled starch is substantially fully hydrated, mixing the starch with a powder of the evaporite mineral to form a mixture; and pelletising the mixture.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: January 26, 2021
    Assignee: YORK POTASH LTD
    Inventors: Robert John Meakin, Timothy David Lewis
  • Composite fertiliser systems
    Patent number: 10899674
    Abstract: A fertiliser pellet comprising: a first region of a nitrogen-providing fertiliser composition; and a second region adhered to the exterior of the first region, the second region comprising a fertiliser composition capable of providing (a) two or more alkali metal and/or alkaline earth metal nutrients and (b) sulphur.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: January 26, 2021
    Assignee: YORK POTASH LTD
    Inventors: Robert John Meakin, Timothy David Lewis
  • Dry powder processing
    Patent number: 10556842
    Abstract: A method for forming a pelletised evaporite mineral product, the method comprising: pulverising an evaporite mineral feedstock to form a dry powder, mixing the dry powder with a binder in the presence of a liquid to form an intermediate blend; and processing the intermediate blend using a pelletiser to form pellets principally composed of the evaporite mineral.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: February 11, 2020
    Assignee: YORK POTASH LTD
    Inventors: Steve Farnworth, Mike Evans, Jim Evans
  • Fertiliser product
    Patent number: 10349574
    Abstract: A fertilizer product in the form of pellets comprising: at least 80% by mass of an evaporite mineral powder having a mean grain size in the range from 50 to 400 pm; and a binder; the pellets having a compression strength greater than 2 kgf. A coated seed product comprising at least one plant seed and a coating adhered to the exterior of the plant seed, comprising an evaporite material.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: July 16, 2019
    Assignee: York Potash Ltd.
    Inventors: Steve Farnworth, Mike Evans, Jim Evans, Robert Meakin