Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 7645335 | Aqueous dispersion of hydrophobized silicon dioxide powder comprising a dispersing agent Aqueous dispersion which comprises hydrophobized silicon dioxide powder with a content of between 5 and 50 wt. % and which comprises at least one compound of the general formula R & supl; —COO—(CH2-CH(Ph)—O)a-(CnH2n-xR2x-O)b-R3 (I). It is... | 01/12/2010 |
| 7306668 | Kaolin pigment having high brightness and narrow particle size distribution and method of preparation therefor The present invention provides high brightness kaolins exhibiting a Brightness (GE) of at least about 90.0. The hydrous kaolin pigments of the present invention may also have, inter alia, a steepness index (d30/d70×100) of at least about 39 an... | 12/11/2007 |
| 7276180 | Chemical mechanical polishing composition and process A composition for chemical mechanical polishing includes a slurry. A sufficient amount of a selectively oxidizing and reducing compound is provided in the composition to produce a differential removal of a metal and a dielectric material. A pH adjusting compound adj... | 10/02/2007 |
| 7122080 | Integrated process for simultaneous beneficiation, leaching, and dewatering of kaolin clay suspension The present invention provides an improved method of beneficiating and dewatering kaolin clays. The product of the improved process is a brightened, dewatered kaolin, suitable for use in pigments and paper coating compositions. The improved beneficiation process pro... | 10/17/2006 |
| 6811600 | Chemically bulked kaolin clay pigment compatible with calcium carbonate and manufacture thereof In a process for preparing a white pigment mixture suitable for coating paper wherein a cationically bulked kaolin clay pigment is dispersed in water in the presence of an anionic dispersant and mixed with a calcium carbonate pigment, the improvement which comprises... | 11/02/2004 |
| 6808559 | Kaolin clay pigments suited to rotogravure printing applications and method for preparing the same The present invention provides kaolin clay pigments having at least the following characteristics: Brightness (GE): at least about 89.0; Shape Factor: at least about 30; Brookfield viscosity, measured at 20 rpm and at less than or equal to about 65% solids: about 10... | 10/26/2004 |
| 6676743 | Lightweight clay and manufacturing method thereof The present invention provides a lightweight clay which can be easily molded into a given shape, exhibits proper lightweight characteristics and storing characteristics, and can be manufactured at a low cost, and a manufacturing method thereof. In such a ... | 01/13/2004 |
| 6537363 | Kaolin pigments, their preparation and use A pigment product suitable for use in a coating composition to provide a gloss coating on paper, the pigment product comprising a processed particulate kaolin produced from a naturally platy kaolin clay having a particle size distribution such that about ... | 03/25/2003 |
| 6235107 | Method for separating mixture of finely divided minerals and product thereof A method for the treatment of a kaolin clay crude to separate by selective flocculation impurity particles contained in the crude from finely divided kaolinite particle contained in the crude, comprising: (a) forming said crude into a dispersed aqueous slurry ... | 05/22/2001 |
| 6120595 | Method of producing activated clay for treating aromatic hydrocarbons The present invention provides an activated clay for refining aromatic hydrocarbons such as BTX (benzene, toluene, xylene), etc., satisfying the requirements of both excellent life and excellent side-reaction-preventing property. The activated clay for tr... | 09/19/2000 |
| 6093669 | Method for selecting raw material for bleaching clay A process for making a bleaching clay composition useful for purification of oil is disclosed. The process involves controlled acidification of a palygorskite and smectite clay mineral with sulfuric acid. The clay mineral starting material exhibits, in an... | 07/25/2000 |
| 6068693 | Method for separating mixture of finely divided minerals and product thereof A method of enhancing the brightness and increasing the yield of a kaolin clay by optimizing the removal of the titania and mica impurities in the clay and the amount of clay remaining in the slurry is disclosed. The method is a selective flocculation pro... | 05/30/2000 |
| 5938833 | Chemical process for fractionating mineral particles based on particle size This invention pertains to the use of a combination of polyvalent cations, clay dispersant and high molecular weight anionic polymer to preferentially remove colloidal fines (slimes) from a kaolin slurry, leaving the remainder of the kaolin in the slurry ... | 08/17/1999 |
| 5908500 | Activated clay composition and method High performance acid activated clays suitable for bleaching oil are produced by contacting an intercalating clay mineral with a strong acid in a polar organic liquid.... | 06/01/1999 |
| 5837136 | Mineral eluting material and manufacturing method thereof, and structural body of mineral eluting material The present invention relates to a mineral eluting material for drinking water with granite as raw material and manufacturing method thereof and a structural body of mineral eluting material. The mineral eluting material includes granite crushed to sizes ... | 11/17/1998 |
| 5830818 | Process for the microwave beneficiation of discolored kaolin clay materials Kaolin clay materials containing discoloring impurities can be beneficiated by microwave irradiation in the presence of water and a polyprotic acid component to produce a beneficiated kaolin clay material having improved color and brightness.... | 11/03/1998 |
| 5783511 | Process for selecting raw material and making a bleaching clay A process for making a bleaching clay composition useful for purification of oil is disclosed. The process of involves controlled acidification of a palygorskite--smectite clay mineral with sulfuric acid.... | 07/21/1998 |
| 5753029 | Method for bleaching kaolin clay An improved method for improving the brightness of clay of the type that is capable of being bleached by an oxidative reagent, such as Georgia gray kaolin. Such clay, in the form of a dispersed slurry, is treated with a combination of an inorganic condens... | 05/19/1998 |
| 5743952 | Aqueous suspensions of inorganic materials A process for improving the rheological properties of an aqueous suspension of a particulate inorganic material which comprises the steps of: (a) forming an aqueous suspension of the particulate inorganic material and an effective amount of an anionic pol... | 04/28/1998 |
| 5685900 | Method for beneficiating discolored kaolin to produce high brightness coating clay A method for beneficiating a low brightness fine particle size discolored kaolin crude to produce a high brightness coating clay. By combining the two beneficiating techniques of selective flocculation and ozonation, a synergistic phenomena occurs and a c... | 11/11/1997 |
| 5637284 | Process for continuous refining of quartz powder A rotating cylindrical quartz glass tube is partitioned into at least 3 chambers comprising a pre-heating chamber, a reaction chamber, and a gas desorption chamber. The process comprises pre-heating the starting quartz powder by continuously supplying it ... | 06/10/1997 |
| 5603411 | Method for separating mixture of finely divided minerals A selective flocculation process that uses a mixture of dispersants including soda ash to disperse a slimed ore pulp prior to conditioning with a fatty acid, salt and then a polymeric flocculating agent.... | 02/18/1997 |
| 5522924 | Method for producing high brightness low abrasion calcined kaolin pigment A process for preparing a high brightness, low abrasion calcined kaolin. A cretaceous crude is wet beneficiated by subjecting same as an aqueous slurry to degritting, classification, magnetic separation, and scrub grinding. The slurry from the foregoing i... | 06/04/1996 |
| 5454865 | Method for preparing refined kaolin in clay products A method which enables economical and highly effective preparation of refined kaolin clay products having preselected particle size distributions and brightnesses, by means of separate, efficient and economical processing of at least two crude components.... | 10/03/1995 |
| 5397754 | Method of brightening kaolin clay by thermal oxidative decarboxylation of organic contaminants A method for brightening kaolin contaminated with organic matter by decarboxylation treatment of an aqueous kaolin slurry. The decarboxylation is carried out by contacting the clay slurry with selected oxidizing agent in a pressurized reaction vessel at a... | 03/14/1995 |
| 5391526 | Situ method for producing hydrosulfite bleach and use thereof A process for reacting metallic iron with sulfur dioxide (SO2) gas in the presence of water and bleachable matter, especially iron-contaminated kaolin clay, whereby the kaolin or the like is bleached in situ and the viscosity of the kaolin is l... | 02/21/1995 |
| 5376605 | Process for beneficiating Minnesota kaolin A process for increasing the brightness of Minnesota kaolin clay containing chlorite and siderite mineral impurities comprising treating the clay with a strong mineral acid preferably in combination with magnetic separation.... | 12/27/1994 |
| 5371051 | Method for producing high opacifying kaolin pigment A method for producing calcined kaolin pigments of high opacifying properties and low abrasion. A kaolin crude is selected having a G.E. brightness in the range of 70 to 80, a titania content of 2.0 to 3.0% by weight, less than 2% iron expressed as Fe | 12/06/1994 |
| 5342443 | Method for bleaching kaolin clay An improved method for improving the brightness of clay of the type that is capable of being bleached by an oxidative reagent such as Georgia gray kaolin. Such clay, in the form of a dispersed slurry, is treated with a combination of sodium silicate, sodi... | 08/30/1994 |
| 5266539 | Process for the deferrization of kaolin, quartzose sand, paper filler, white pigment, pumice and electronics materials The present invention relates to a process for selectively purifying ceramic materials for glass, paper and electronics use contaminated with iron compounds, the process using ascorbic acid or its derivatives as the iron reducing agent.... | 11/30/1993 |
| 5227349 | Process for producing a kaolin clay product A process for producing a high solids aqueous slurry of a beneficiated kaolin. An impure crude kaolin clay is initially subjected to wet processing including a size classification step, to recover a beneficiated fine particle size kaolin fraction which is... | 07/13/1993 |
| 5190900 | Process for removing iron from kaolin, quartz and other mineral concentrates of industrial interest A chemical process is described for removing ferric iron present in submarginal quantities in concentrates of kaolin, quartz, titanium minerals, ceramic minerals for glass, paper and electronics use and other materials of industrial interest by which ferr... | 03/02/1993 |
| 5145814 | In situ method for producing hydrosulfite beach and use thereof A process for reacting metallic iron with sulfur dioxide (SO2) gas in the presence of water and bleachable matter, especially iron-contaminated kaolin clay, whereby the kaolin or the like is bleached in situ.... | 09/08/1992 |
| 5143599 | Process for refining kaolin A process is disclosed for producing high brightness kaolin from ore containing silica, other types of clays, minerals such as ilmenite micas, feldspars and various metal silicates as well as organic matter. The process consists of sizing, a double floata... | 09/01/1992 |
| 5112782 | Cationically processed calcined kaolin clay A method for producing a low abrasion calcined kaolin pigment which comprises forming an aqueous pulp of crude kaolin dispersing the pulp by adding thereto sufficient water-soluble organic cationic dispersant to impart a positive zeta potential to said pa... | 05/12/1992 |
| 4976786 | Method for forming aggregated kaolin pigment A method for forming a hydrothermally aggregated kaolin clay pigment, comprising preparing an aqueous slurry of particulate kaolin clay and sodium aluminate, having a total solids concentration of from about 2 to 25% by weight, the weight ratio between ka... | 12/11/1990 |
| 4935391 | Process for preparing a purified mineral coating A process is provided for purifying finely divided minerals contacting organic material sufficiently to make the minerals useful for coating a filling paper or for use as catalysts, catalyst supports or the like. The process comprises concomitantly contac... | 06/19/1990 |
| 4915930 | Process for producing aluminum hydroxide of improved whiteness A process for producing aluminum hydroxide including the steps of: (a) dissolving colorant-containing aluminum hydroxide for forming a solution; (b) treating the solution for collecting colorant into solid phase material; (c) separating the solid phase materia... | 04/10/1990 |
| 4650521 | Processing of kaolinitic clays at high solids under acidic conditions A process for beneficiating a crude kaolinitic clay mineral to produce a clay filler for use in papermaking to improve the brightness, the color characteristics and the light scattering efficiency of the paper product. The crude kaolin clay is blunged wit... | 03/17/1987 |
| 4451440 | Utilization of ion exchange resin in the processing of kaolins A method of processing naturally occurring kaolin clay wherein ion exchange resins are utilized to remove charged soluble impurities from the clay thereby eliminating the filtration step required in conventional clay beneficiation process. Further, by sat... | 05/29/1984 |
