Michael J Levesque

US Patent:

6352747, Mar 5, 2002

Filed:

Feb 29, 2000

Appl. No.:

09/515661

Inventors:

William P. Blackburn - Safety Harbor FL
Michael B. Levesque - Clearwater FL
Ernesto Maldonado - Palm Harbor FL

Assignee:

PPG Industries Ohio, Inc. - Cleveland OH

International Classification:

B05D 102

US Classification:

427425, 427162, 4271631, 427164, 427240, 118 52, 118320

Abstract:

Described is an process for producing uniform coatings on circular substrates that reduces the amount of coating required. The improved process includes the steps of applying the liquid coating material through a single opening of a dispenser having certain characteristics, in a pattern onto the center of a spinning substrate, and then radially moving the dispenser opening near to the edge of the substrate while maintaining the dispenser opening at a predetermined distance from the substrate surface for substantially the entire radius of the substrate providing uniform coverage. Also described are products produced by the process that are substantially free of cosmetic defects and may be photochromic.

US Patent:

7410691, Aug 12, 2008

Filed:

Mar 4, 2004

Appl. No.:

10/793241

Inventors:

William P. Blackburn - Safety Harbor FL, US
Michael B. Levesque - Tampa FL, US
Kevin J. Stewart - Murrysville PA, US
Cathy L. Short - Largo FL, US

Assignee:

PPG Industries Ohio, Inc. - Cleveland OH

International Classification:

B32B 17/10
G02C 7/02

US Classification:

428334, 428339, 428412, 4284231, 351159

Abstract:

Describes a photochromic article, e. g. , a plastic ophthalmic photochromic article, such as a lens, in which the article includes (1) a rigid substrate, such as a thermoset or thermoplastic polymeric substrate, (2) a photochromic polymeric coating appended to at least one surface of the substrate, the photochromic polymeric coating containing a photochromic amount of at least one photochromic material, e. g. , spirooxazine, naphthopyran and/or fulgide, and (3) an acrylate-based film coherently appended to the photochromic coating, the acrylate-based film containing an adhesion promoting amount of an adhesion promoter, e. g. , an aminoorganosilane, silane coupling agent, organic titanate coupling agent or organic zirconate coupling agent. Describes also the aforedescribed photochromic article having an abrasion-resistant coating affixed to the acrylate-based film, e. g. , an abrasion-resistant coating comprising an organo silane; and a photochromic article having an antireflective coating affixed to the abrasion-resistant coating.

US Patent:

7452611, Nov 18, 2008

Filed:

Aug 28, 2002

Appl. No.:

10/229773

Inventors:

William P. Blackburn - Safety Harbor FL, US
Michael B. Levesque - Tampa FL, US
Kevin W. Seybert - McKeesport PA, US
Jeanine A. Conklin - Swissvale PA, US
Nancyanne Gruchacz - Clearwater FL, US

Assignee:

Transitions Optical, Inc. - Pinellas Park FL

International Classification:

B32B 27/08
G02C 7/02

US Classification:

428500, 428505, 351159

Abstract:

Describes a photochromic plastic article, e. g. , an ophthalmic photochromic article, such as a lens, in which the article includes (1) a polymeric substrate, such as a thermoset or thermoplastic substrate, (2) a photochromic polymeric coating appended to at least one surface of the substrate, the photochromic polymeric coating containing a photochromic amount of at least one organic photochromic material, e. g. , spirooxazine, naphthopyran and/or fulgide, and (3) a radiation-cured, acrylate-based film coherently appended to the photochromic coating, the acrylate-based film being (a) resistant to removal by aqueous solutions of inorganic caustic, e. g. , potassium hydroxide, (b) compatible with organo silane-containing abrasion-resistant coating, and (c) harder than said photochromic coating. Describes also the aforedescribed photochromic article having an abrasion-resistant coating affixed to the radiation-cured acrylate-based film, e. g. , an abrasion-resistant coating comprising an organo silane; and a photochromic article having an antireflective coating affixed to the abrasion-resistant coating.