David F Engel

US Patent:

7459259, Dec 2, 2008

Filed:

Sep 29, 2004

Appl. No.:

10/953680

Inventors:

David B. Engel - Clifton Park NY, US
David G. Gascoyne - Scehectady NY, US
Radislav A. Potyrailo - Nishayuna NY, US
Philippe Schottland - Evansville IN, US
Micah Sakiestewa Sze - Albany NY, US
Marc B. Wisnudel - Clifton Park NY, US

Assignee:

SABIC Innovative Plastics IP B.V. - Bergen op Zoom

International Classification:

G03C 1/00
G03C 7/00

US Classification:

4302701, 430363, 430945

Abstract:

A method of marking a thermoplastic article can comprise: combining a thermoplastic with a light-marking additive to form a composition, forming the composition into an article having a maximum optical absorption wavelength; and illuminating, at a marking wavelength, at least a portion of the article with a device having a power of less than or equal to about 200 mW, to form a light-mark. The light-mark can have a size, as measured along a major axis, of greater than or equal to about 10 micrometers. The light-mark can also have a mark absorption wavelength that is greater than or equal to about 100 nm of the maximum optical absorption wavelength, and can have a spectral absorption curve.

US Patent:

7807473, Oct 5, 2010

Filed:

Oct 26, 2005

Appl. No.:

11/259506

Inventors:

Radislav A. Potyrailo - Niskayuna NY, US
Timothy M. Sivavec - Clifton Park NY, US
Caibin Xiao - Harleysville PA, US
Theodore J. Cecconie - Buckingham PA, US
Lamyaa Hassib - Niskayuna NY, US
Andrew M. Leach - Clifton Park NY, US
David B. Engel - The Woodlands TX, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

G01N 21/00

US Classification:

436164, 436166, 436167, 436169, 436171, 436172, 436800, 436805, 422 50

Abstract:

A method of quantitatively measuring the concentration of a chemical species in a sample solution with a sensor film. A hydrogel sensor film is prepared having a chemical composition comprising an indicator that changes its optical property in the ultra-violet, visible or near-infrared spectral range upon being exposed to the chemical species in the sample solution. The film is exposed to a fixed amount of the sample solution. The concentration of the chemical species in the sample solution is quantified using the average absorbance measured from the sensor film.

US Patent:

8647883, Feb 11, 2014

Filed:

Sep 13, 2010

Appl. No.:

12/880830

Inventors:

Radislav A. Potyrailo - Niskayuna NY, US
Timothy M. Sivavec - Clifton Park NY, US
Caibin Xiao - Harleysville PA, US
Theodore J. Cecconie - Buckingham PA, US
Lamyaa Hassib - Niskayuna NY, US
Andrew M. Leach - Clifton Park NY, US
David B. Engel - The Woodlands TX, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

G01N 21/00

US Classification:

436164, 436166, 436167, 436169, 436171, 436172, 436800, 436805, 422 50

Abstract:

A method of quantitatively measuring the concentration of a chemical species in a sample solution with a sensor film. A hydrogel sensor film is prepared having a chemical composition comprising an indicator that changes its optical property in the ultra-violet, visible or near-infrared spectral range upon being exposed to the chemical species in the sample solution. The film is exposed to a fixed amount of the sample solution. The concentration of the chemical species in the sample solution is quantified using the average absorbance measured from the sensor film.

US Patent:

20060072444, Apr 6, 2006

Filed:

Sep 29, 2004

Appl. No.:

10/952653

Inventors:

David Engel - Clifton Park NY, US
David Gascoyne - Scehectady NY, US
Radislav Potyrailo - Niskayuna NY, US
Philippe Schottland - Evansville IN, US
William Smith - Schenectady NY, US
Micah Sze - Albany NY, US
Marc Wisnudel - Clifton Park NY, US
Pingfan Wu - Niskayuna NY, US

International Classification:

G11B 7/24

US Classification:

369275100, 369272100

Abstract:

A storage medium can comprise a substrate, a reflective layer disposed on a side of the substrate, and data. The substrate can comprise a thermoplastic and a light-mark formed from at least a portion of light-marking additive mixed with the thermoplastic, wherein an optical property of the light-marking additive at an optical drive read wavelength can change due to being contacted with a mark wavelength. A method for using a storage medium can comprise directing a reading device to detect an inspection area of the storage medium, and wherein the inspection area on an authentic medium has a light-mark in a substrate of the storage medium that forms an optically induced signature. The optically induced signature can be converted to a digital identification signature and the digital identification signature can be verified for authenticity.