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| Number | Title | Issue Date |
| 6544598 | Electrostatic process for depositing abrasive materials The use of a solid state waveform generator together with a suitable non-inverting amplifier provides a very versatile system for depositing particles on a substrate by an upward deposition, or "UP", technique.... | 04/08/2003 |
| 6523215 | Polishing pad and system The invention provides a double sided waffle-surfaced foam polishing pad and a polishing system with which it can be used. The double sided feature allows great versatility in the type of polishing that can be accomplished using the same pad.... | 02/25/2003 |
| 6511713 | Production of patterned coated abrasive surfaces An electrostatic abrasive grain upward projection deposition process utilizing opposed electrodes produces a patterned abrasive surface by controlling the local intensity of the field by which the grain is projected on to a substrate.... | 01/28/2003 |
| 6499680 | Grinding media Alpha alumina milling media made by a sol-gel process have improved utility in milling alumina materials in a bead mill.... | 12/31/2002 |
| 6500493 | Electrostatic deposition process Fine abrasive powders can be made more free-flowing and better adapted to electrostatic upward projection deposition in the production of coated abrasives by the control of the volume resistivity of the powder to a level that is not greater than 1014... | 12/31/2002 |
| 6451076 | Engineered abrasives Coated abrasives suitable for very fine abrading applications can be obtained by depositing a layer of a formulation comprising abrasive grits, fillers, grinding aid, additives and a binder resin on a substrate in the form of a structured abrasive, adheri... | 09/17/2002 |
| 6439988 | Corner sanding tool Sanding tools made from a block of a foamed polymer sponge having two contiguous sides meeting at a right angle that are provided with an abrasive coating and which have in addition a means for grasping the tool formed in the body of the sponge so that th... | 08/27/2002 |
| 6413286 | Production tool process The production of an engineered surface on a coated abrasive is made more versatile by the use of a production tool obtained using a master tool created by a rapid prototyping technique.... | 07/02/2002 |
| 6410470 | Thermal spray powder process It is found that calcining chromium oxide powders having a particle size component smaller than 10 microns reduces the volume proportion of smaller particles and increases the general uniformity of particle sizes in the distribution and the roundness of t... | 06/25/2002 |
| 6402604 | Process for the production of coated abrasive discs The invention provides individually made abrasive discs with the primary abrasive surface around the periphery of the disc where the bulk of the abrading action occurs when the disc is in use. The invention also provides a process by which these discs can... | 06/11/2002 |
| 6395044 | Scented engineered abrasives The invention provides coated abrasives with an engineered surface that releases a pleasing fragrance when used.... | 05/28/2002 |
| 6390906 | Flexible abrasive belts Providing an abrasive belt with a pattern of holes through the abrasive-containing layer greatly increases the flexibility of the belt and reducing the need for flexing to generate a pattern of potentially destructive cracks in the abrasive surface.... | 05/21/2002 |
| 6391072 | Abrasive grain Alpha alumina abrasive grits which are particularly well-suited to medium to low pressure grinding applications wherein the grits comprise uniformly dispersed microvoids.... | 05/21/2002 |
| 6387534 | Random packing element The invention provides a novel improved packing element having the basic shape of a polygon with arches formed around the periphery by deforming the edge area in one direction and an area axially within the edge area to form arches projecting in the oppos... | 05/14/2002 |
| 6372124 | Removal of impurities from hydrocarbon streams The invention provides a method of purifying hydrocarbon streams from metallic impurities which comprises passing the stream through media comprising alumina with relatively minor amounts of calcia and magnesia.... | 04/16/2002 |
| 6368199 | Backing plates for abrasive disks Backing plates are provided for use with abrasive disks designed to permit a view of the surface while abrading is occurring. This is achieved by the removal of portions of the circumference of the plate and preferably also viewing apertures in the body o... | 04/09/2002 |
| 6364920 | CMP formulations CMP formulations comprising alumina particles and an iodate oxidizer can be stabilized against pH drift during use by acidification using an organic acid. Formulation pH stability can be further enhanced by treating the formulation at an elevated temperat... | 04/02/2002 |
| 6312325 | Sanding disks Accessories for an angle grinder include a disposable rotary sanding disk having quite large shaped ventilating/viewing apertures, for use with a resilient backing plate also having shaped ventilating apertures. The apertures of one or both parts are shap... | 11/06/2001 |
| 6293980 | Production of layered engineered abrasive surfaces Coated abrasives comprising shaped structures deposited on a backing can be given increased versatility can be made by a process in which the shaped structure is imposed on a structure deposited in layers on the backing before the shaped structures are fo... | 09/25/2001 |
| 6280288 | Process for determining optimum grinding conditions The invention provides a useful tool for advising customers for abrasive tools on the selection of optimum grinding conditions for the use of a specific tool wherein the tool is in the form of a performance map generated from a plurality of data points ob... | 08/28/2001 |
| 6261328 | Dimensionally stable abrasive discs This invention describes a method of making abrasive products such as discs with enhanced resistance to deformation as a result of the influence of moisture by laminating a coated abrasive having a fibrous backing lacking dimensional stability when expose... | 07/17/2001 |
| 6258136 | Fixed abrasives for optical polishing An optical polishing tool comprises alpha alumina and ceria components in relative weight proportions of from 30:70 to 70:30 dispersed in a resin binder. Particularly preferred are coated abrasives. Such coated abrasives produce an improved optical polish... | 07/10/2001 |
| 6257973 | Coated abrasive discs The invention provides individually made abrasive discs with the primary abrasive surface around the periphery of the disc where the bulk of the abrading action occurs when the disc is in use. The invention also provides a process by which these discs can... | 07/10/2001 |
| 6258141 | Sol-gel alumina abrasive grain Coating a sol-gel alumina abrasive grit with a ceramic oxide reduces the surface area of the grit and allows the production of vitreous bonded products using low temperature vitreous bond materials without the production of black spots as a result of the ... | 07/10/2001 |
| 6258137 | CMP products CMP processes and products employ aluminas comprising alpha alumina particles having a particle width of less than 50 nanometers and a surface area of at least 50 m2 /gm.... | 07/10/2001 |
| 6244947 | Wire brush attachment for angle grinder Accessories for an angle grinder include a rotary disk tool having a working zone around the periphery of the disk comprising a plurality of wire bristles and a rest means for supporting the grinder on a surface to be shaped. The rest means may be a non-r... | 06/12/2001 |
| 6238450 | Ceria powder A polishing slurry, useful in optical or CMP applications, comprises a ceria with a BET surface area of at least 10 m2 /gm. The slurry may be made by subjecting a commercial ceria slurry comprising agglomerates to a mechano-chemical treatment a... | 05/29/2001 |
| 6221133 | Fluid separation packing The invention provides a cellular packing including a vapor/liquid separation device that can be stacked vertically with minimum wasted space. The packing uses static vanes in each cell to direct the liquid component of a vapor/liquid mixture to exit slot... | 04/24/2001 |
| 6207612 | Removal of impurities from hydrocarbon streams The invention provides media for absorption of phosphate and metal contaminants from a hydrocarbon stream and a method of making such media. The media comprise alumina with relatively minor amounts of calcia and magnesia and are made by a process in which... | 03/27/2001 |
| 6187070 | Enhanced radiation cure Production of a finished fabric backing for use in the production of a coated abrasive is performed using a dual cure system comprising a radiation curable binder and a thermal initiator in which polymerization is initiated by the use of radiation until t... | 02/13/2001 |
| 6173470 | Brush attachment for grinder The invention provides a wire brush disc shaped grinder accessory that has segments removed from the circumference of the disc to provide visibility of the work surface while in use and with the bristles of the wire brush arranged in groups around the dis... | 01/16/2001 |
| 6159089 | Grinding system The invention describes an abrasive system comprising a fiber-backed abrasive disc and a backup pad in which the backup pad has spaced portions removed from the circumference such that the disc overlaps in the area of the removed portions. This has the ef... | 12/12/2000 |
| 6136288 | Firing fines Fine powders of ceramic materials can be obtained by firing a precursor powder in a rotary kiln while carried on coarse carrier particles.... | 10/24/2000 |
| 6110241 | Abrasive grain with improved projectability Abrasive grain with increased projectability in a UP deposition process is provided with a first conductive coating and a second coating comprising a silicon-containing compound.... | 08/29/2000 |
| 6096107 | Superabrasive products Coated abrasives with engineered abrasive surfaces are produced using superabrasive particles mixed with metal particles in a cold-forming process.... | 08/01/2000 |
| 6089550 | Mass transfer process A dual flow mass transfer process is provided which employs a dual flow mass transfer tray having perforations, at least some of which are provided with vapor flow deflectors to deflect the flow of vapor rising through the perforations to give the vapor f... | 07/18/2000 |
| 6083622 | Firing sol-gel alumina particles Sol-gel alumina that is dried but unfired can be explosively comminuted by feeding the dried gel into a furnace held at temperatures above those at which vaporizable materials are eliminated from the particles of gel. At suitably elevated temperatures the... | 07/04/2000 |
| 6077156 | Grinding disc Abrasive discs with spaced portions removed from the circumference in the form of rounded and elongated V-shapes provide, when in use, complete vision of a workpiece being abraded with reduced tendency to snag on obstructions.... | 06/20/2000 |
| 6066189 | Abrasive article bonded using a hybrid bond Bonded abrasive products comprising alumina-based abrasive grains and a geopolymer bond system are significantly improved by providing the grain with a vitreous coating before incorporation in the geopolymer bond.... | 05/23/2000 |
| 6062965 | Backup pad for rotary grinder This invention provides an improved backup pad for an abrasive disk adapted to permit a view of surface as it is being ground which comprises a compressible pad and a relatively rigid support member laminated to the pad that has shorter radial dimensions ... | 05/16/2000 |
