George C Korn

US Patent:

6936556, Aug 30, 2005

Filed:

Apr 7, 2003

Appl. No.:

10/408737

Inventors:

Srinivasan Sridharan - Strongsville OH, US
George C. Korn - Coraopolis PA, US
Jérôme Anquetil - Bar le Duc, FR
Robert Blonski - North Royalton OH, US
Ivan H. Joyce - Hudson OH, US

Assignee:

Ferro Corporation - Cleveland OH

International Classification:

C03C008/02
C03C008/04

US Classification:

501 14, 501 16, 501 17, 501 18, 501 21, 501 26, 501 65, 501 72, 501 73, 501 77, 501 78

Abstract:

The present invention provides partially crystallizing lead-free and cadmium-free glass enamel composition that fuse at low temperatures. Glass enamel compositions according to the present invention form predominantly bismuth titanate and optionally zinc titanate crystals upon firing. Preferably, glass enamel compositions according to the invention include a glass component that includes by weight from about 11% to about 52% SiO, from 10. 2% to about 40% TiO, from about 5% to about 75% BiO, up to about 8% BO, up to about 14% BaO+SrO, and up to about 45% by weight ZnO, where the sum of BiOand ZnO comprises from about 30% to about 85% of the glass component by weight.

US Patent:

53344120, Aug 2, 1994

Filed:

Dec 23, 1991

Appl. No.:

7/813207

Inventors:

George C. Korn - Coraopolis PA
Robert P. Blonski - North Royalton OH

Assignee:

Ferro Corporation - Cleveland OH

International Classification:

B05D 512

US Classification:

427108

Abstract:

The present invention provides a novel enamel composition and a method of using the same to decorate substrates such as a section of glass. The enamel composition comprises a solids portion and a vehicle. The solids portion includes at least one glass frit and a separate and distinct addition of silicon. The solids portion comprises from about 0. 01 weight percent to about 20 weight percent metallic silicon.

US Patent:

52081915, May 4, 1993

Filed:

Nov 27, 1991

Appl. No.:

7/799389

Inventors:

Clifford G. Ruderer - Pittsburgh PA
Robert C. Stroup - Pittsburgh PA
George C. Korn - Coraopolis PA

Assignee:

Ferro Corporation - Cleveland OH

International Classification:

C03C 804
C03C 814

US Classification:

501 17

Abstract:

The present invention provides a new and useful enamel composition and method of using the same for producing an enamel finish on a formed section of glass. The enamel composition partially crystallizes upon heating, thereby helping to prevent the forming and handling equipment from sticking and/or adhering to the composition during the forming operation. The enamel composition includes a crystallizable glass frit portion and a seed powder. The crystallized glass frit portion includes precursors from which Zn. sub. 2 SiO. sub. 4 can be crystallized upon firing of the enamel composition. The seed powder causes at least a portion of the precursors to crystallize upon firing such that during firing at least a part of the crystallizable glass frit yields crystallized Zn. sub. 2 SiO. sub. 4. The enamel composition also preferably includes bismuth oxide (Bi. sub. 2 O. sub. 3) in order to help further ensure that no sticking and/or adhering problems develop during the forming operation.

US Patent:

52862704, Feb 15, 1994

Filed:

Apr 7, 1993

Appl. No.:

8/044293

Inventors:

Clifford G. Ruderer - Pittsburgh PA
Robert C. Stroup - Pittsburgh PA
George C. Korn - Coraopolis PA

Assignee:

Ferro Corporation - Cleveland OH

International Classification:

C03B 1100
C03B 1704

US Classification:

65 33

Abstract:

The present invention provides a method of producing an enamel finish on formed section of glass. The enamel composition partially crystallizes upon heating, thereby helping to prevent the forming and handling equipment from sticking and/or adhering to the composition during the forming operation. The enamel composition includes a crystallizable glass frit portion and a seed powder. The crystallized glass frit portion includes precursors from which Zn. sub. 2 SiO. sub. 4 can be crystallized upon firing of the enamel composition. The seed powder causes at least a portion of the precursors to crystallize upon firing such that during firing at least a part of the crystallizable glass frit yields crystallized Zn. sub. 2 SiO. sub. 4 formed by the precursors. Preferably, the precursors comprise ZnO and SiO. sub.