Patents Assigned to Crosfield Limited
-
Publication number: 20040105896Abstract: 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: ApplicationFiled: July 10, 2003Publication date: June 3, 2004Applicant: Crosfield LimitedInventors: Norman B. Roberts, Maurice Webb, Benjamin J. Rankin
-
Patent number: 6479036Abstract: 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 cohesionType: GrantFiled: December 5, 2000Date of Patent: November 12, 2002Assignee: Crosfield LimitedInventors: Peter W Stanier, Charlotte R Evans
-
Patent number: 6448218Abstract: 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: GrantFiled: August 3, 1999Date of Patent: September 10, 2002Assignee: Crosfield LimitedInventors: Peter Willem Appel, Theodorus Johannes Cornelius Arts, Carolyn Angela Lanceley, Theo Jan Osinga
-
Patent number: 6399111Abstract: 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: GrantFiled: September 14, 1999Date of Patent: June 4, 2002Assignee: Crosfield LimitedInventor: Peter W. Stanier
-
Patent number: 6039798Abstract: 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: GrantFiled: February 12, 1999Date of Patent: March 21, 2000Assignee: Crosfield LimitedInventors: Derek Aldcroft, Sharron Bates, Graham James Earl
-
Patent number: 5998360Abstract: 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: GrantFiled: April 13, 1998Date of Patent: December 7, 1999Assignee: Crosfield LimitedInventors: Keith R Cockett, Theo J Osinga
-
Patent number: 5964937Abstract: 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: GrantFiled: December 23, 1997Date of Patent: October 12, 1999Assignee: Crosfield LimitedInventor: Peter William Stanier
-
Patent number: 5904914Abstract: 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: GrantFiled: July 28, 1997Date of Patent: May 18, 1999Assignee: Crosfield LimitedInventor: Abraham Araya
-
Patent number: 5891473Abstract: 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: GrantFiled: July 9, 1997Date of Patent: April 6, 1999Assignee: Crosfield LimitedInventor: Peter William Stanier
-
Patent number: 5874381Abstract: 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: GrantFiled: April 8, 1997Date of Patent: February 23, 1999Assignee: Crosfield LimitedInventors: Raimond Laurentius Bonne, Cornelis Martinus Lok
-
Patent number: 5855898Abstract: 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: GrantFiled: December 2, 1996Date of Patent: January 5, 1999Assignee: Crosfield LimitedInventors: Pamela E. Baines, Peter W. Stanier
-
Patent number: 5846430Abstract: 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: GrantFiled: August 19, 1996Date of Patent: December 8, 1998Assignee: Crosfield LimitedInventors: Keith Robert Cockett, Maurice Webb, Roderick Terence Whalley
-
Patent number: 5637636Abstract: 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: GrantFiled: June 15, 1995Date of Patent: June 10, 1997Assignee: Crosfield LimitedInventors: Simon Cartwright, Ian P. McKeown, Peter W. Stanier
-
Patent number: 5624652Abstract: 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: GrantFiled: June 1, 1995Date of Patent: April 29, 1997Assignee: Crosfield LimitedInventors: Derek Aldcroft, Peter W. Stanier
-
Patent number: 5616310Abstract: 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: GrantFiled: July 9, 1996Date of Patent: April 1, 1997Assignee: Crosfield LimitedInventors: Richard B. Edwards, Peter Graham
-
Patent number: 4166030Abstract: 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: GrantFiled: August 15, 1978Date of Patent: August 28, 1979Assignee: De La Rue Crosfield LimitedInventors: John B. Lewis, Roy E. Winchester
-
Patent number: 4116430Abstract: 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: GrantFiled: December 21, 1977Date of Patent: September 26, 1978Assignee: De La Rue Crosfield LimitedInventors: Roy E. Winchester, Michael J. Marjoran, Roger O'Brien