1
Wood William P C O Minnesota M: Abrasive grits formed of ceramic, impregnation method of making the same and products made therewith.. Minnesota Mining & Mfg, November 30, 1988: EP0293163-A2 (78 worldwide citation)

Ceramic abrasive grits are formed by an impregnation process that involves preparing an alumina hydrate sol, drying the sol to form a porous solid, crushing the solid to produce particles, calcining the dried particles, preparing a mixture of an additive metal oxide or its precursor in a liquid vehi ...


2
Wood William P C O Minnesota M, Monroe Larry D C O Minnesota M, Conwell Stanley L C O Minnesot: Abrasive grits formed of ceramic containing oxides of aluminum and rare earth metal, method of making and products made therewith.. Minnesota Mining & Mfg, November 30, 1988: EP0293164-A2 (9 worldwide citation)

Ceramic abrasive grits comprising alpha alumina and at least about 0.5 percent by weight rare earth metal oxide are prepared by combining alumina hydrate and rare earth metal oxide or its precursors to produce a blend, drying the blend to produce a dried solid, crushing the dried solid to produce gr ...


3
Mathers James P C O Minnesota, Wood William P C O Minnesota M, Forester Thomas E C O Minnesot: Method of preparing aluminum oxide/aluminum oxynitride/group ivb metal nitride abrasive particles derived by a sol-gel process.. Minnesota Mining & Mfg, July 6, 1988: EP0273569-A2 (5 worldwide citation)

The present invention provides a nearly fully dense, microcrystalline, composite ceramic abrasive particle comprising grains of alumina, gamma-aluminum oxynitride and, optionally, a Periodic Group IVB metal nitride in the system Al2O3/ALON/Group IVB metal nitride. In another aspect, two different pr ...


4
Erickson Dwight D C O Minnesot, Wood William P C O Minnesota M: Abrasive grain comprising calcium oxide and/or strontium oxide.. Minnesota Mining & Mfg, June 29, 1994: EP0603715-A1 (4 worldwide citation)

Alumina-based abrasive grain comprising rare earth oxide and calcium oxide and/or strontium oxide, and a method of making the same. The abrasive grain is useful in abrasive articles, such as coated abrasives, three-dimensional, low density abrasives, and bonded abrasives.


5
Mathers James P C O Minnesota, Wood William P C O Minnesota M: Aluminum nitride/aluminum oxynitride/group iv b metal nitride abrasive particles derived from a sol-gel process.. Minnesota Mining & Mfg, June 15, 1988: EP0271237-A1 (3 worldwide citation)

A multiphase, microcrystalline, nearly fully dense ceramic composite has grains comprising 0 to 95 volume percent aluminum nitride, 0 to 95 volume percent polytypes of aluminum nitride, 0 to 95 volume percent gamma-aluminum oxynitride, and 5 to 50 volume percent of at least one of titanium nitride, ...


6
Conwell Stanley L C O Minnesot, Wood William P C O Minnesota M: Method for making sintered abrasive grain and apparatus for sintering abrasive grain.. Minnesota Mining & Mfg, August 9, 1995: EP0666460-A1

A method for making abrasive grain and an apparatus (10) for sintering unsintered abrasive grain precursor to provide sintered abrasive grain. Abrasive grain prepared according to the method of the present invention can be incorporated into abrasive articles such as bonded abrasives (e.g., grinding ...