Steven J Ferranti

US Patent:

7294044, Nov 13, 2007

Filed:

Apr 8, 2005

Appl. No.:

11/102555

Inventors:

Steven A. Ferranti - Rochester NY, US

Assignee:

Ferro Corporation - Cleveland OH

International Classification:

B24B 1/00

US Classification:

451 42, 451 60, 252 791, 252 794

Abstract:

The present invention provides a slurry composition and method for polishing organic polymer-based ophthalmic substrates. The slurry composition according to the invention includes an aqueous dispersion of abrasive particles and a pyrrolidone compound. The abrasive particles can be alumina, zirconia, silica, titania or combinations of the foregoing. Slurry compositions according to the invention can be used to polish all types of organic polymer-based ophthalmic substrates, but are particularly useful for polishing organic polymer-based ophthalmic substrates having an index of refraction greater than 1. 498 because they remove such materials at a greater efficiency than conventional slurry compositions without detrimentally affecting the quality of the resulting surface.

US Patent:

7300478, Nov 27, 2007

Filed:

May 22, 2003

Appl. No.:

10/444104

Inventors:

Steven A. Ferranti - Rochester NY, US
Dana L. Zagari - Bloomfield NY, US
Karla Marie Goff - Waterloo NY, US

Assignee:

Ferro Corporation - Cleveland OH

International Classification:

B24B 1/00
C09G 1/02

US Classification:

51298, 51302, 51303, 51307, 51309, 451 41, 106 3, 106 5

Abstract:

The present invention provides an aqueous slurry composition that comprises cerium oxide and/or cerium oxide-containing mixed rare earth oxide abrasive particles, a polyacrylate, and an agent that retards hard settling. The agent that retards hard settling is preferably a polysaccharide such as xanthan gum, microcrystalline cellulose and/or sodium alginate, the latter of which may be treated with a divalent metal salt such as calcium carbonate. The slurry composition according to the invention can be used to polish glass and glass ceramics at a high removal rate, but does not hard settle upon extended static conditions and can be easily resuspended. The present invention also provides a method of polishing a glass or glass ceramic substrate using the slurry composition.

US Patent:

7467988, Dec 23, 2008

Filed:

Mar 22, 2007

Appl. No.:

11/689543

Inventors:

Steven A. Ferranti - Rochester NY, US

Assignee:

Ferro Corporation - Cleveland OH

International Classification:

B24B 1/00

US Classification:

451 42, 451 60, 51298

Abstract:

The present invention provides a slurry composition and method for polishing organic polymer-based ophthalmic substrates. The slurry composition according to the invention includes an aqueous dispersion of abrasive particles and a pyrrolidone compound. The abrasive particles can be alumina, zirconia, silica, titania or combinations of the foregoing. Slurry compositions according to the invention can be used to polish all types of organic polymer-based ophthalmic substrates, but are particularly useful for polishing organic polymer-based ophthalmic substrates having an index of refraction greater than 1. 498 because they remove such materials at a greater efficiency than conventional slurry compositions without detrimentally affecting the quality of the resulting surface.

US Patent:

49083465, Mar 13, 1990

Filed:

Jul 1, 1987

Appl. No.:

7/068391

Inventors:

Lauri A. Strom - Rochester NY
Edward Carnall - Rochester NY
Steven A. Ferranti - Rochester NY
Jose M. Mir - Webster NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H05K 100
H05K 116
B32B 300
B32B 702

US Classification:

505 1

Abstract:

Thick film circuit elements are disclosed comprised of an insulative substrate selected from the group consisting of strontium titanate, magnesia, alumina, and aluminum nitride, and providing a conductive path between at least two locations on the substrate, a crystalline rare earth alkaline earth copper oxide layer exhibiting a superconducting onset transition temperature in excess of 77. degree. C. comprised on an R. sub. 1 A. sub. 2 C. sub. 3 crystalline phase.