Patents Assigned to Crosfield Limited
  • Publication number: 20040105896
    Abstract: A mixed metal compound for pharmaceutical use is free from aluminium and has a phosphate binding capacity of at least 30%, by weight of the total weight of phosphate present, over a pH range of from 2-8. The compound is especially useful for treatment of hyperphosphataemia. The metals are preferably iron (III) and at least one of calcium, magnesium, lanthanum and cerium. A metal sulphate for pharmaceutical use is selected from at least one of calcium, lanthanum and cerium sulphate compounds and has a phosphate binding capacity of at least 30% by weight of the total phosphate present, over a pH range from 2-8.
    Type: Application
    Filed: July 10, 2003
    Publication date: June 3, 2004
    Applicant: Crosfield Limited
    Inventors: Norman B. Roberts, Maurice Webb, Benjamin J. Rankin
  • Patent number: 6479036
    Abstract: Silica particles for incorporation into a dentifrice composition, preferably as a thickening agent, have a polyether glycol such as polyethylene glycol applied thereto in order to enhance dentifrice cohesion
    Type: Grant
    Filed: December 5, 2000
    Date of Patent: November 12, 2002
    Assignee: Crosfield Limited
    Inventors: Peter W Stanier, Charlotte R Evans
  • Patent number: 6448218
    Abstract: A modified aluminosilicate in powder form comprising alkali metal silicate deposited onto aluminosilicate of the zeolite P type particles presents increased Liquid Carrying Capacity.
    Type: Grant
    Filed: August 3, 1999
    Date of Patent: September 10, 2002
    Assignee: Crosfield Limited
    Inventors: Peter Willem Appel, Theodorus Johannes Cornelius Arts, Carolyn Angela Lanceley, Theo Jan Osinga
  • Patent number: 6399111
    Abstract: An amorphous silica having an RDA value of between 40 and 70, an oil absorption capacity of between 90 and 145 cc/100 g and a moisture loss of less than 7% w/w, can be incorporated at a 10% to 25% loading into a transparent toothpaste having a refractive index of below 1.445, this toothpaste having an RDA value of less than 60.
    Type: Grant
    Filed: September 14, 1999
    Date of Patent: June 4, 2002
    Assignee: Crosfield Limited
    Inventor: Peter W. Stanier
  • Patent number: 6039798
    Abstract: Wax coated silica matting agent wherein the silica is an amorphous silica having a pore volume of at least 1.5 cm.sup.3 /g, preferably at least 1.8 cm.sup.3 /g. The wax coating is present in the range from 6% to 15% by weight of the matting agent and comprises a synthetic polyethylene wax.
    Type: Grant
    Filed: February 12, 1999
    Date of Patent: March 21, 2000
    Assignee: Crosfield Limited
    Inventors: Derek Aldcroft, Sharron Bates, Graham James Earl
  • Patent number: 5998360
    Abstract: Soluble alkali metal silicates combined with antiredeposition agents can actually have a beneficial effect on bleach stabilisation if said antiredeposition agents are intimately mixed with an alkali metal silicate solution, the resulting product being then dried (spray drying, turbo drying, etc . . . ) into granules.
    Type: Grant
    Filed: April 13, 1998
    Date of Patent: December 7, 1999
    Assignee: Crosfield Limited
    Inventors: Keith R Cockett, Theo J Osinga
  • Patent number: 5964937
    Abstract: An amorphous silica having an RDA value of between 30 and 70, an oil absorption capacity of between 100 and 155 cc/100 g and a moisture loss of less than 7% w/w, can be incorporated at a 10% to 25% loading into a transparent toothpaste having a refractive index of above 1.445, this toothpaste having an RDA value of between 30 and 60.
    Type: Grant
    Filed: December 23, 1997
    Date of Patent: October 12, 1999
    Assignee: Crosfield Limited
    Inventor: Peter William Stanier
  • Patent number: 5904914
    Abstract: Process for manufacturing an alkali metal aluminosilicate of zeolite P type wherein a sodium silicate solution and a sodium aluminate solution are continuously added together in a first reacting zone in the presence of zeolite P seeds, to produce a first mixture said mixture being continuously transferred from this first reacting zone to a second reacting zone, the resulting product being eventually filtered, washed and dried.
    Type: Grant
    Filed: July 28, 1997
    Date of Patent: May 18, 1999
    Assignee: Crosfield Limited
    Inventor: Abraham Araya
  • Patent number: 5891473
    Abstract: Granular composition comprising 45 to 98% w/w of a water insoluble particulate, whereby 10 to 75% of the water insoluble particulate is made from a water insoluble particulate material, having a weight mean particle size of less than 20 microns and oil absorption capacity of 60 to 180 g/100 g and 10 to 75% of the water insoluble particulate is made from a water insoluble particulate material, having a weight mean particle size of below 20 microns and an oil absorption 200 to 350 g/100 g, the granular composition having a particle size, by sieve analysis, of 95% below 600 microns and 90% above 40 microns.
    Type: Grant
    Filed: July 9, 1997
    Date of Patent: April 6, 1999
    Assignee: Crosfield Limited
    Inventor: Peter William Stanier
  • Patent number: 5874381
    Abstract: A cobalt on transition alumina catalyst, containing between 3 and 40% by weight of cobalt has a cobalt surface area above 30 m.sup.2 /.sub.g of cobalt, preferably above 50 m.sup.2 /.sub.g of cobalt, most preferably above 80 m.sup.2 /.sub.g of cobalt.
    Type: Grant
    Filed: April 8, 1997
    Date of Patent: February 23, 1999
    Assignee: Crosfield Limited
    Inventors: Raimond Laurentius Bonne, Cornelis Martinus Lok
  • Patent number: 5855898
    Abstract: A thickening system containing an amorphous silica and xanthan gum in a silica/xanthan gum weight ratio from 160:1 to 2:1, preferably 100:1 to 5:1, most preferably 30:1 to 6.5:1 can be used to stabilise and thicken cosmetic compositions containing alpha-hydroxy carboxylic acids.
    Type: Grant
    Filed: December 2, 1996
    Date of Patent: January 5, 1999
    Assignee: Crosfield Limited
    Inventors: Pamela E. Baines, Peter W. Stanier
  • Patent number: 5846430
    Abstract: Effluents containing residual dyes are contacted with an effective amount of hydrotalcite-like material together with an effective amount of a magnesium salt or a mixture of magnesium salts, the weight ratio (on dry basis) of hydrotalcite-like material to magnesium salt being in the range of 20:1 to 1:20. Residual dyes are removed from effluents.
    Type: Grant
    Filed: August 19, 1996
    Date of Patent: December 8, 1998
    Assignee: Crosfield Limited
    Inventors: Keith Robert Cockett, Maurice Webb, Roderick Terence Whalley
  • Patent number: 5637636
    Abstract: An amorphous silica has a pore size distribution wherein 90% of the pores have a diameter above 15 nanometers, and less than 20% of the pore volume is in pores having a pore diameter between 10 and 20 nanometers, the amorphous silica having a CTAB surface area of less than 100 m.sup.2 /g, the amorphous silica having a matting efficiency of below 20 gloss units at an incidence angle of 60.degree. and a loading of 5% by weight. It can be prepared by a precipitation route. It is used in thixotropic paints and lacquers.
    Type: Grant
    Filed: June 15, 1995
    Date of Patent: June 10, 1997
    Assignee: Crosfield Limited
    Inventors: Simon Cartwright, Ian P. McKeown, Peter W. Stanier
  • Patent number: 5624652
    Abstract: Amorphous silicas suitable for use as abrasives in transparent toothpastes can be prepared by a precipitation route. These silicas are distinguished by having a BET surface area of 10 to 90 M.sup.2 /g, a weight mean particle size of 5 to 15 micron, and a plastics abrasion value of 16 to 20, a transmission of at least 70% in the RI range from 1,430 to 1,443 and an oil absorbtion in the range from about 70 to about 150 cm.sup.3 /100 g.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: April 29, 1997
    Assignee: Crosfield Limited
    Inventors: Derek Aldcroft, Peter W. Stanier
  • Patent number: 5616310
    Abstract: Process for manufacturing an alkali metal aluminosilicate of zeolite P type, wherein sodium silicate solution, sodium aluminate solution and sodium hydroxide are mixed together in a first reacting zone, the mixture reacting to form amorphous aluminosilicate and supersaturated mother liquor and being then transferred from this first reacting zone to a second reacting zone, the transferred mixure having a degree of crystallinity below 30%, preferably 20%, the mixture being afterwards allowed to fully convert into P type zeolite, the resulting product being eventually filtered, washed and dried.
    Type: Grant
    Filed: July 9, 1996
    Date of Patent: April 1, 1997
    Assignee: Crosfield Limited
    Inventors: Richard B. Edwards, Peter Graham
  • Patent number: 4166030
    Abstract: A sheet handling apparatus for documents requiring secure handling, such as banknotes. The documents are fed one at a time along a main flow-line in which they are sensed to determine whether they are in a fit condition or in an unfit condition. If unfit, they are routed into a secondary flow-line leading to a shredder, the secondary flow-line including further checking structure to ensure that documents classed as unfit in the main flow-line are present in the secondary flow-line at the appropriate time and are guided to the shredder.
    Type: Grant
    Filed: August 15, 1978
    Date of Patent: August 28, 1979
    Assignee: De La Rue Crosfield Limited
    Inventors: John B. Lewis, Roy E. Winchester
  • Patent number: 4116430
    Abstract: A flexible sheet stacker is described which includes a support surface disposed substantially at right-angles to a flowline along which flexible sheets are fed in spaced relationship. The support surface is adapted to support in a stack the leading edges of the successive sheets fed along the flowline. The pressure-member is arranged to contact a face of a first sheet fed to the support surface and is thereafter movable away from the flowline against biasing means as sheets are progressively fed to the support surface. A wedge shaped separation member is movable along a substantially rectilinear path in advance of a sheet approaching the support surface, the separation member contacting the face of the stack and maintaining the contact during rectilinear movement of the separation means up to the support surface, a face of the stack being thereby displaced laterally out of the path of the leading edge of the approaching sheet as the sheet is advanced up to the support surface.
    Type: Grant
    Filed: December 21, 1977
    Date of Patent: September 26, 1978
    Assignee: De La Rue Crosfield Limited
    Inventors: Roy E. Winchester, Michael J. Marjoran, Roger O'Brien