Patents by Inventor Peter W. Stanier
Peter W. Stanier 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).
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Patent number: 7662363Abstract: An amorphous silica suitable for use in a dental composition has a weight mean particle size in the range 3 to 15 ?m with at least 90 per cent by weight of particles having a size below 20 ?m, a Radioactive Dentine Abrasion (RDA) determined on an aqueous slurry of the silica powder of 100 to 220, a Pellicle Cleaning Ratio (PCR), when incorporated in a dental composition at 10 per cent by weight, greater than 85, the ratio of PCR to RDA being in the range 0.4:1 to less than 1:1 and having a Plastics Abrasion Value (PAV) in the range 11 to 19. A silica having the above properties is prepared by a precipitation route. The silica made available by the invention is also useful as an anti-blocking agent in plastics.Type: GrantFiled: November 29, 2002Date of Patent: February 16, 2010Assignee: PQ Silicas UK LimitedInventors: Peter W. Stanier, Simon R. Stebbing
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Publication number: 20030044442Abstract: A granular composition for use in a personal care product comprises at least one water-insoluble inorganic material having a particle size of no more than 50 &mgr;m and up to 10 percent by weight based on weight of water-insoluble inorganic material of a non-binding swelling agent, the granules having a particle size greater than about 50 &mgr;m and up to about 1000 &mgr;m, as measured by sieve analysis, a dry strength such that from about 20 to about 70 percent by weight pass through a 212 &mgr;m sieve when subjected to the attrition test defined herein and a wet strength such that less than 12 percent by weight residue remains on a 45 &mgr;m sieve after ultrasonification in water for 1 minute with 48 &mgr;m amplitude of vibration, and wherein said granules possess sufficient strength so as not to substantially break down when present in said personal care product.Type: ApplicationFiled: August 29, 2002Publication date: March 6, 2003Inventors: Peter W Stanier, Pamela E Baines
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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
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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
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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
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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
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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
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Patent number: 5512271Abstract: 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 100 to 450 m.sup.2 /g, a weight mean particle size of 5 to 15 microns, a plastics abrasion value of 16 to 26, a mean pore diameter from 2 to 12 nm, a transmission of at least 70% in the refractive index range from 1.430 to 1.443 and an oil absorption in the range from about 70 to about 130 cm.sup.3 /g.Type: GrantFiled: July 5, 1994Date of Patent: April 30, 1996Assignee: Unilever Patent Holdings BVInventors: Ian P. McKeown, Peter W. Stanier
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Patent number: 5326395Abstract: A silica matting agent has a wax coating comprising a mixture of three waxes, i.e. hard microcrystalline, plasticising monocrystalline and synthetic polyethylene. The use of this ternary mixture gives the matting agent improved interaction with lacquers and improved sedimentation.Type: GrantFiled: November 6, 1992Date of Patent: July 5, 1994Assignee: Unilever Patent Holdings B.V.Inventors: Derek Aldcroft, Ian P. McKeown, Bryan Rogers, Peter W. Stanier
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Patent number: 5098695Abstract: A precipitated silica, suitable for use in toothpastes, has a high absorbency, i.e. 110 to 180 cm.sup.3 100 g, and good abrasivity with a plastics abrasion value of 12 to 20. The silica provides abrasion even at a relatively low particle size.Type: GrantFiled: January 24, 1991Date of Patent: March 24, 1992Assignee: Unilever Patent Holdings, B.V.Inventors: John R. Newton, James P. Quinn, Peter W. Stanier
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Patent number: 5035879Abstract: 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 420 to 550 m.sup.2 /g, a weight mean particle size of 5 to 20 micron, a perspex abrasion value of 15 to 28, a mean pore diameter from 3 to 8 nm and a transmission of at least 70% in the R1 range from 1.444 to 1.460.Type: GrantFiled: October 29, 1990Date of Patent: July 30, 1991Assignee: Unilever Patent Holdings BVInventors: Derek Aldcroft, John R. Newton, Peter W. Stanier
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Patent number: 4992251Abstract: 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 420 to 550 m.sup.2 /g, a weight mean particle size of 5 to 20 micron, a perspex abrasion value of 15 to 28, a mean pore diameter from 3 to 8 nm and a transmission of at least 70% in the R1 range from 1.444 to 1.460.Type: GrantFiled: September 15, 1988Date of Patent: February 12, 1991Assignee: Unilever Patent Holdings B.V.Inventors: Derek Aldcroft, John R. Newton, Peter W. Stanier
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Patent number: 4956167Abstract: An amorphous silica, especially precipitated silica, suitable for use in toothpastes, has a high abrasivity represented by a perspex abrasion value in the range from about 23 to about 35.Type: GrantFiled: March 22, 1989Date of Patent: September 11, 1990Assignee: Unilever Patent Holdings B.V.Inventors: Derek Aldcroft, John R. Newton, James P. Quinn, Peter W. Stanier