Christopher J Baldy

US Patent:

20100232003, Sep 16, 2010

Filed:

Mar 11, 2010

Appl. No.:

12/721850

Inventors:

Christopher J. Baldy - Murrysville PA, US
Vitawat Lahsangah - Saint Petersburg FL, US
Grady M. Lenski - Tampa FL, US
Joseph D. Turpen - Safety Harbor FL, US

Assignee:

TRANSITIONS OPTICAL, INC. - Pinellas Park FL

International Classification:

G02B 5/23
G02B 1/00
G02B 1/04

US Classification:

359243, 252586

Abstract:

The invention provides an optical article including a substrate; and a colorant composition connected to at least a portion of the substrate. The colorant composition is a fixed-tint colorant; and a photochromic material. The article exhibits a passive state and an activated state, such that the article can switch from the passive state to the activated state in response to at least actinic radiation and to revert back to the passive state in response to thermal energy. The passive state is characterized by a transmittance ranging from greater than 30% to 70% across a wavelength range of from 460 nanometers to 500 nanometers.

US Patent:

52942651, Mar 15, 1994

Filed:

Mar 15, 1993

Appl. No.:

8/031508

Inventors:

Ralph C. Gray - Butler PA
Michael J. Pawlik - Glenshaw PA
Paul J. Prucnal - Pittsburgh PA
Christopher J. Baldy - Warrendale PA

Assignee:

PPG Industries, Inc. - Pittsburgh PA

International Classification:

C23C 2202

US Classification:

148250

Abstract:

Aqueous acid solutions for treating metal surfaces such as aluminum and galvanized steel are disclosed. The solutions are mixtures of organophosphates or phosphonates and chloride or fluoride. The treating solutions can be used in place of chromium treating solutions.

US Patent:

20190271612, Sep 5, 2019

Filed:

Dec 30, 2016

Appl. No.:

16/462365

Inventors:

- Tuam, IE
Christopher J. Baldy - Murrysville PA, US
Bérangère Granger - St. Petersburg FL, US
Robert E. Summers - Brandon FL, US
Cheng Y. Tang - Mars PA, US

International Classification:

G01M 11/02
G02C 7/10

Abstract:

A method of determining outdoor characteristics of a photochromic optical article includes: determining environmental conditions for an area; positioning the optical article to face a first direction; determining a first incident irradiance on the optical article; determining a first surface temperature and first spectrum of the optical article; rotating the optical article to face a second direction; determining a second surface temperature and Full Characterization of Lens second spectrum of the optical article; determining a second incident irradiance on the optical article; and generating a prediction model of spectral transmission of the optical article. Further using environmental and climate conditions and to select a photochromic article most appropriate for an area.