Punam Kumari Giri

US Patent:

6445486, Sep 3, 2002

Filed:

Nov 28, 2000

Appl. No.:

09/724118

Inventors:

Jeffrey R. Lomprey - Holland MI
Thomas F. Guarr - Holland MI
Kelvin L. Baumann - Holland MI
Punam Giri - Holland MI

Assignee:

Gentex Corporation - Zeeland MI

International Classification:

G02F 115

US Classification:

359265, 359267, 359270, 359273, 252582, 252586

Abstract:

An electrochromic medium for use in an electrochromic device comprising: at least one solvent; a cathodic electroactive material; an anodic electroactive material; an optional beneficial agent; wherein at least one of the cathodic and anodic electroactive materials is electrochromic; and wherein at least one of the cathodic electroactive material, anodic electroactive material, and/or optional beneficial agent is associated with a solubilizing moiety which serves to increase solubility of the associated material or agent relative to the same without the solubilizing moiety.

US Patent:

6560004, May 6, 2003

Filed:

Jun 19, 2001

Appl. No.:

09/884717

Inventors:

David A. Theiste - Byron Center MI
Kelvin L. Baumann - Holland MI
Punam Giri - Holland MI
Thomas F. Guarr - Holland MI

Assignee:

Gentex Corporation - Zeeland MI

International Classification:

G02F 115

US Classification:

359265, 359273

Abstract:

Coupling of anodic electrochromic compounds by a covalent bond or a bridge link which provides for electronic communication between the coupled electrochromic compounds results in coupled electrochromic compounds which exhibit greater stability as well as electrochromic activity that differs from the monomeric electrochromic compounds. Extension of the absorption spectrum into the near-infrared region of the spectrum is frequently observed. The coupled electrochromic compounds are highly suitable for use in electrochromic media used to produce electrochromic devices.

US Patent:

6614578, Sep 2, 2003

Filed:

Aug 2, 2002

Appl. No.:

10/211485

Inventors:

Punam Giri - Holland MI
Leroy J. Kloeppner - Jenison MI
Kelvin L. Baumann - Holland MI
Jeffrey R. Lomprey - Holland MI
Thomas F. Guarr - Holland MI

Assignee:

Gentex Corporation - Zeeland MI

International Classification:

G02F 115

US Classification:

359265, 359267, 359270, 359273, 252582

Abstract:

The present invention is directed to an electrochromic medium for use in an electrochromic device comprising at least one solvent, an anodic material, a cathodic material, wherein both of the anodic and cathodic materials are electroactive and at least one of the anodic and cathodic materials is electrochromic, and an ultraviolet stabilizing material, wherein the ultraviolet stabilizing material includes a solublizing moiety which serves to increase solubility of the ultraviolet stabilizing material relative to the same without the solublizing moiety.

US Patent:

6710906, Mar 23, 2004

Filed:

Nov 13, 2001

Appl. No.:

10/054108

Inventors:

Thomas F. Guarr - Holland MI
Kathy E. Roberts - East Grand Rapids MI
Rongguang Lin - Holland MI
Kelvin L. Baumann - Holland MI
David A. Theiste - Byron Center MI
Punam Giri - Holland MI
Elizabeth M. Sanford - Holland MI

Assignee:

Gentex Corporation - Zeeland MI

International Classification:

G02F 115

US Classification:

359265, 359267, 359270, 359273

Abstract:

An electrochromic medium for use in an electrochromic device comprising: at least one solvent; an anodic electroactive material; a cathodic electroactive material; wherein at least one of the anodic and cathodic electroactive materials is electrochromic; and wherein at least one of the anodic and cathodic electroactive materials is associated with a diffusion coefficient controlling moiety which serves to lower the diffusion coefficient of the associated material relative to the same without the diffusion coefficient controlling moiety.

US Patent:

6876479, Apr 5, 2005

Filed:

May 21, 2004

Appl. No.:

10/850989

Inventors:

Punam Giri - Holland MI, US
Thomas F. Guarr - Holland MI, US

Assignee:

Gentex Corporation - Zeeland MI

International Classification:

G02F001/15
G02F001/153

US Classification:

359273, 359265, 359274, 359275

Abstract:

An electrochromic medium for use in a tristate electrochromic device, comprising: (a) at least one solvent; (b) at least one anodic material; (c) at least one cathodic material, wherein both of the anodic and cathodic materials are electroactive and at least one of the anodic and cathodic materials is electrochromic; (d) wherein, in a first state, the electrochromic medium exhibits a maximum light transmission; (e) wherein, in a second state, variable attenuation occurs to a significant extent in one of visible radiation or near-infrared radiation without significant attenuation in the other; and (f) wherein, in a third state, variable attenuation occurs to a significant extent in the other spectral region.

US Patent:

7075697, Jul 11, 2006

Filed:

Sep 27, 2005

Appl. No.:

11/236071

Inventors:

Punam Giri - Holland MI, US
Thomas F. Guarr - Holland MI, US

Assignee:

Gentex Corporation - Zeeland MI

International Classification:

G02F 1/15
G02F 1/153

US Classification:

359273, 359265, 359274, 359275

Abstract:

An electrochromic medium for use in a tristate electrochromic device, comprising: (a) at least one solvent; (b) at least one anodic material; (c) at least one cathodic material, wherein both of the anodic and cathodic materials are electroactive and at least one of the anodic and cathodic materials is electrochromic; (d) wherein, in a first state, the electrochromic medium exhibits a maximum light transmission; (e) wherein, in a second state, variable attenuation occurs to a significant extent in one of visible radiation or near-infrared radiation without significant attenuation in the other; and (f) wherein, in a third state, variable attenuation occurs to a significant extent in the other spectral region.

US Patent:

7428091, Sep 23, 2008

Filed:

Nov 10, 2005

Appl. No.:

11/272552

Inventors:

Kelvin L. Baumann - Holland MI, US
Thomas F. Guarr - Holland MI, US
Punam Giri - Holland MI, US
Mark D. Muyskens - Holland MI, US
Sue F. Franz - Holland MI, US

Assignee:

Gentex Corporation - Zeeland MI

International Classification:

G02F 1/15

US Classification:

359265

Abstract:

An electrochromic device having an electrochromic medium comprising: a material represented by the following formula:.

US Patent:

7835059, Nov 16, 2010

Filed:

Apr 1, 2005

Appl. No.:

11/096470

Inventors:

Punam Giri - Holland MI, US
Thomas F. Guarr - Holland MI, US

Assignee:

Gentex Corporation - Zeeland MI

International Classification:

G02F 1/15
G02F 1/153

US Classification:

359273, 359265, 359274, 359275

Abstract:

An electrochromic medium for use in a tristate electrochromic device, comprising: (a) at least one solvent; (b) at least one anodic material; (c) at least one cathodic material, wherein both of the anodic and cathodic materials are electroactive and at least one of the anodic and cathodic materials is electrochromic; (d) wherein, in a first state, the electrochromic medium exhibits a maximum light transmission; (e) wherein, in a second state, variable attenuation occurs to a significant extent in one of visible radiation or near-infrared radiation without significant attenuation in the other; and (f) wherein, in a third state, variable attenuation occurs to a significant extent in the other spectral region.