Donald R Giovanini

43406351, Jul 20, 1982

Dec 15, 1980

6/216397

Richard A. Langman - Lakewood CO
Donald R. Giovanini - Arvada CO
Michael P. Letzig - Broomfield CO

Coors Porcelain Company - Golden CO

B32B 300

428164

In accordance with the invention there is provided a sintered monolithic ceramic substrate for fine-line electrical circuitry, the substrate comprising a base layer containing at least 90% by weight crystalline alumina or beryllia and a thin upper layer containing at least 90% by weight crystalline material the same as that of the base layer but with an average grain size less than that of the crystalline material of the base layer, the upper layer having an irregular interface with the base layer but a planar upper surface with minimal surface irregularities for improved reception of the fine-line circuitry to be applied. Further in accordance with the invention such substrate is made by first forming and firing a ceramic plate of alumina or beryllia ceramic to provide the base layer and then applying and firing a coating of fine grain alumina or beryllia, as the case may be, on the plate to provide the upper layer.

46311602, Dec 23, 1986

Nov 4, 1981

6/318289

Richard A. Langman - Lakewood CO
Donald R. Giovanini - Arvada CO
Michael P. Letzig - Broomfield CO

Coors Porcelain Company - Golden CO

C04B 3332

264 62

In accordance with the invention there is provided a sintered monolithic ceramic substrate for fine-line electrical circuitry, the substrate comprising a base layer containing at least 90% by weight crystalline alumina or beryllia and a thin upper layer containing at least 90% by weight crystalline material the same as that of the base layer but with an average grain size less than that of the crystalline material of the base layer, the upper layer having an irregular interface with the base layer but a planar upper surface with minimal surface irregularities for improved reception of the fine-line circuitry to be applied. Further in accordance with the invention such substrate is made by first forming and firing a ceramic plate of alumina or beryllia ceramic to provide the base layer and then applying and firing a coating of fine grain alumina or beryllia, as the case may be, on the plate to provide the upper layer.

20150368160, Dec 24, 2015

Jun 12, 2015

14/737755

- Golden CA, US
Donald Robert GIOVANINI - Golden CO, US

C04B 35/10
C04B 35/64

A sintered ceramic ball is described that includes an incomplete ceramic ball portion with a wall with an exterior surface, the wall having an interior space located radially interior of an inner surface of the wall. The incomplete ceramic ball portion also has an exterior surface, the exterior surface having an exterior surface area. The sintered ceramic ball further includes a ceramic plug joined with the incomplete ceramic ball portion to form a continuous exterior ball surface. The ceramic plug includes an exterior plug surface and a plug wall. The plug surface includes an exterior plug surface area, wherein the exterior plug surface area is between about 5% to 49.9% of the sum of the exterior surface area of the incomplete ceramic ball portion and the exterior plug surface area. The interior space of the sintered ceramic ball is sealed within the wall and the plug wall.