Kristopher J Derks

US Patent:

7468204, Dec 23, 2008

Filed:

Feb 25, 2008

Appl. No.:

12/036840

Inventors:

Timothy J. Hebrink - Oakdale MN, US
Martin E. Denker - Vadnais Heights MN, US
Bert T. Chien - St. Paul MN, US
Matthew B. Johnson - St. Paul MN, US
Richard J. Thompson - Lino Lakes MN, US
Kristopher J. Derks - Maplewood MN, US
William W. Merrill - White Bear Lake MN, US
Fuming B. Li - Woodbury MN, US

International Classification:

B32B 7/02
B32B 27/08
B32B 27/36
C08L 67/02
C08L 69/00

US Classification:

428212, 428412, 428480, 525437, 525444, 525448, 528302, 528305, 528307, 528308, 5283086

Abstract:

Modified copolyesters having relatively low refractive indices and relatively high glass transition temperatures are disclosed. These modified copolyesters can be used in forming one or more layers in an optical film, such as a multilayer polymer film.

US Patent:

8012571, Sep 6, 2011

Filed:

May 2, 2008

Appl. No.:

12/114109

Inventors:

Yufeng Liu - Woodbury MN, US
David T. Yust - Woodbury MN, US
Stephen A. Johnson - Woodbury MN, US
Kristopher J. Derks - Woodbury MN, US

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

B32B 7/00
B32B 7/02
B32B 27/08
B32B 27/30

US Classification:

428212, 428480, 528293, 528295, 528302, 528305, 528307, 528308, 5283086, 5283087, 359487, 359488, 359494, 359586, 359838

Abstract:

The present invention relates to multilayer optical films and birefringent copolyester films. The birefringent copolyester optical layer or birefringent copolyester film comprises a major amount of naphthalate units, ethylene units, and a minor amount of branched or cyclic C4 to C10 alkyl units. Also described are certain copolyester polymeric materials further comprising subunits of a phthalate ionomer such as dimethyl sulfosodium isophthtalate ionomer.

US Patent:

8182924, May 22, 2012

Filed:

May 14, 2010

Appl. No.:

12/780312

Inventors:

Timothy J. Hebrink - Scandia MN, US
Stephen A. Johnson - Woodbury MN, US
Kristopher J. Derks - Woodbury MN, US
Kevin M. Hamer - St. Paul MN, US

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

B32B 7/06
B32B 27/18
B32B 27/30
B32B 27/32
B32B 27/36

US Classification:

428483, 428212, 428421, 428480, 428522, 428523, 428 401, 428 415, 428 418, 525199, 525222

Abstract:

A multilayer optical body is disclosed. The optical body includes an optical film including polyester, a first skin layer is disposed on at least one side of the polyester optical film, and a strippable skin layer is disposed on the first skin layer. The first skin layer includes a mixture of a polyacrylate and an anti-static polymer. Methods of making such optical bodies are also disclosed.

US Patent:

8263731, Sep 11, 2012

Filed:

Jul 14, 2011

Appl. No.:

13/182658

Inventors:

Yufeng R. Liu - Woodbury MN, US
David T. Yust - Woodbury MN, US
Stephen A. Johnson - Woodbury MN, US
Kristopher J. Derks - Woodbury MN, US

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

B32B 27/36
C08G 63/16
C08G 63/181
C08G 63/187
C08G 63/189

US Classification:

528308, 428480, 528302, 528305, 528307, 5283086, 5283087

Abstract:

The present invention relates to multilayer optical films and birefringent copolyester films. The birefringent copolyester optical layer or birefringent copolyester film comprises a major amount of naphthalate units, ethylene units, and a minor amount of branched or cyclic C4 to C10 alkyl units. Also described are certain copolyester polymeric materials further comprising subunits of a phthalate ionomer such as dimethyl sulfosodium isophthalate ionomer.

US Patent:

8409720, Apr 2, 2013

Filed:

May 14, 2010

Appl. No.:

12/780302

Inventors:

Timothy J. Hebrink - Scandia MN, US
Stephen A. Johnson - Woodbury MN, US
Kristopher J. Derks - Woodbury MN, US
Kevin M. Hamer - St. Paul MN, US

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

B32B 7/06
B32B 27/18
B32B 27/30
B32B 27/32
B32B 27/36

US Classification:

428483, 428212, 428421, 428480, 428515, 428520, 428522, 428523, 428 401, 428 415, 428 418, 525199, 525222

Abstract:

A multilayer optical body is disclosed. The optical body includes an optical film including polyester, a first skin layer is disposed on at least one side of the polyester optical film, and a strippable skin layer is disposed on the first skin layer. The first skin layer includes a mixture of a polyacrylate and a second polymer. Methods of making such optical bodies are also disclosed.

US Patent:

8469575, Jun 25, 2013

Filed:

May 19, 2008

Appl. No.:

12/600914

Inventors:

Michael F. Weber - Shoreview MN, US
Timothy J. Hebrink - Scandia MN, US
Timothy J. Nevitt - Red Wing MN, US
John A. Wheatley - Lake Elmo MN, US
Craig R. Schardt - Woodbury MN, US
Rolf W. Biernath - Wyoming MN, US
William J. Bryan - Mahtomedi MN, US
Andrew J. Ouderkirk - Singapore, SG
David G. Freier - St. Paul MN, US
Myron K. Jordan - Eagan MN, US
Kristopher J. Derks - Woodbury MN, US
Zhaohui Yang - North Oaks MN, US
Edward J. Kivel - Stillwater MN, US

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

F21V 7/04

US Classification:

362609, 362623, 362624, 362625, 362626, 362627

Abstract:

A backlight that includes a front reflector and a back reflector that form a hollow light recycling cavity including an output surface is disclosed. The backlight further includes one or more light sources disposed to emit light into the light recycling cavity. The front reflector includes an on-axis average reflectivity of at least 90% for visible light polarized in a first plane, and an on-axis average reflectivity of at least 25% but less than 90% for visible light polarized in a second plane perpendicular to the first plane.

US Patent:

8523419, Sep 3, 2013

Filed:

May 19, 2008

Appl. No.:

12/600862

Inventors:

Timothy J. Nevitt - Red Wing MN, US
Timothy J. Hebrink - Scandia MN, US
Michael F. Weber - Shoreview MN, US
Rolf W. Biernath - Wyoming MN, US
David G. Freier - St. Paul MN, US
John A. Wheatley - Lake Elmo MN, US
Andrew J. Ouderkirk - Singapore, SG
Charles D. Hoyle - Stillwater MN, US
Kristopher J. Derks - Woodbury MN, US

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

F21V 7/04

US Classification:

362613, 362301, 362346, 362612

Abstract:

An edge-lit backlight comprises a front and back reflector forming a hollow light recycling cavity having a cavity depth H and an output region of area Aout, and one or more light sources disposed proximate a periphery of the backlight to emit light into the light recycling cavity. The light sources have an average plan view source separation of SEP collectively having an active emitting area Aemit, wherein a first parameter equals Aemit/Aout and a second parameter equals SEP/H. The first parameter is in a range from 0. 0001 to 0. 1, and by the second parameter is in a range from 3 to 10. The front reflector has a hemispherical reflectivity for unpolarized visible light of R, and the back reflector has a hemispherical reflectivity for unpolarized visible light of R, and R*Ris at least 0. 70.

US Patent:

20060084780, Apr 20, 2006

Filed:

Oct 18, 2004

Appl. No.:

10/967582

Inventors:

Timothy Hebrink - Oakdale MN, US
Martin Denker - Vadnais Heights MN, US
Bert Chien - St. Paul MN, US
Matthew Johnson - St. Paul MN, US
Richard Thompson - Lino Lakes MN, US
Kristopher Derks - Maplewood MN, US
William Merrill - White Bear Lake MN, US
Fuming Li - Woodbury MN, US

International Classification:

C08G 63/02

US Classification:

528272000

Abstract:

Modified copolyesters having relatively low refractive indices and relatively high glass transition temperatures are disclosed. These modified copolyesters can be used in forming one or more layers in an optical film, such as a multilayer polymer film.