Robert J Davidson

US Patent:

6869501, Mar 22, 2005

Filed:

Dec 20, 2001

Appl. No.:

10/028216

Inventors:

Robert S. Davidson - Edina MN, US
Danny B. Anderson - No. St. Paul MN, US
Richard A. Gerth - White Bear Lake MN, US
David R. Holm - Hudson WI, US

Assignee:

3M Innovative Properties Company - Saint Paul MN

International Classification:

B01D003/06
B01D003/42

US Classification:

159 21, 159 171, 159 471, 159DIG 8, 203 2, 203 71, 203 88, 122 40

Abstract:

A process for evaporating a portion of a colloidal solution, said process including: a) passing a colloidal solution, said colloidal solution including particles in a liquid medium, wherein at least a portion of said liquid medium includes at least one volatile component, through one or more orifices into an evaporation zone that has at least one inner surface, wherein said colloidal solution does not substantially contact said at least one inner surface of said evaporation zone as said colloidal solution is passed through said evaporation zone; b) applying pressure in said evaporation zone that is lower than the vapor pressure of said colloidal solution as it is passed into said evaporation zone, allowing for flash evaporation of at least a portion of said at least one volatile component from said colloidal solution; c) adjusting the pressure in said evaporation zone to evaporate an amount of said at least one volatile component from said colloidal solution; and d) collecting the remaining colloidal solution from said evaporation zone.

US Patent:

7241437, Jul 10, 2007

Filed:

Dec 30, 2004

Appl. No.:

11/027426

Inventors:

Robert S. Davidson - Edina MN, US
Brant U. Kolb - Afton MN, US
Danny B. Anderson - North St. Paul MN, US
James A. Higgins - River Falls WI, US
Mark J. Hendrickson - Minneapolis MN, US
John T. Brady - Lino Lakes MN, US

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

C01G 1/00
C01G 25/00

US Classification:

423608, 423 69, 423 85, 4235931

Abstract:

Zirconia particles, methods of making zirconia particles, composite materials that contain the zirconia particles, methods of making the composite materials, and zirconia sols that contain the zirconia particles are described. The zirconia particles are substantially non-associated and have an average size no greater than 50 nanometers and may contain yttrium. The zirconia particles are prepared by a method that includes two separate hydrothermal treatments.

US Patent:

7429422, Sep 30, 2008

Filed:

Jun 7, 2007

Appl. No.:

11/759520

Inventors:

Robert S. Davidson - Edina MN, US
Brant U. Kolb - Afton MN, US
Danny B. Anderson - North St. Paul MN, US
James A. Higgins - River Falls WI, US
Mark J. Hendrickson - Minneapolis MN, US
John T. Brady - Lino Lakes MN, US

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

B32B 15/08
B32B 27/00
B32B 27/06

US Classification:

4284111, 428418, 4284231, 4284259, 428458, 428480, 428500

Abstract:

Zirconia particles, methods of making zirconia particles, composite materials that contain the zirconia particles, methods of making the composite materials, and zirconia sols that contain the zirconia particles are described. The zirconia particles are substantially non-associated and have an average size no greater than 50 nanometers and may contain yttrium. The zirconia particles are prepared by a method that includes two separate hydrothermal treatments.

US Patent:

7514263, Apr 7, 2009

Filed:

Apr 2, 2001

Appl. No.:

09/824330

Inventors:

James Michael Nelson - Rosevill MN, US
Robert Stephen Davidson - Edina MN, US
Jeffrey Jacob Cernohous - Hudson WI, US
Michael John Annen - Hudson WI, US
James Robert McNerney - Inver Grove Heights MN, US
Robert Wade Ferguson - Saint Paul MN, US
Anthony Robert Maistrovich - Woodbury MN, US
James Alan Higgins - River Ralls WI, US

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

G01N 31/10

US Classification:

436 37, 436 34, 436180, 422129, 422130, 422131, 422134

Abstract:

A system is provided wherein a plug flow reactor is used to make combinatorial libraries of materials. Examples of plug flow reactors include stirred tube reactors, extruders, and static mixers.

US Patent:

7674523, Mar 9, 2010

Filed:

Aug 19, 2008

Appl. No.:

12/194183

Inventors:

Robert S. Davidson - Edina MN, US
Brant U. Kolb - Afton MN, US
Danny B. Anderson - North St. Paul MN, US
James A. Higgins - River Falls WI, US
Mark J. Hendrickson - Minneapolis MN, US
John T. Brady - Lino Lakes MN, US

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

B32B 5/16

US Classification:

428323

Abstract:

Zirconia particles, methods of making zirconia particles, composite materials that contain the zirconia particles, methods of making the composite materials, and zirconia sols that contain the zirconia particles are described. The zirconia particles are substantially non-associated and have an average size no greater than 50 nanometers and may contain yttrium. The zirconia particles are prepared by a method that includes two separate hydrothermal treatments.

US Patent:

8330176, Dec 11, 2012

Filed:

Feb 13, 2008

Appl. No.:

12/030265

Inventors:

D. Scott Thompson - Woodbury MN, US
Robert S. Davidson - Bloomington MN, US
Chien-Chih Chiang - Taipei, TW
Huang Chin Hung - Yonghe, TW

Assignee:

3M Innovative Properties Company - Saint Paul MN

International Classification:

H01L 33/00

US Classification:

257 98, 257E33001

Abstract:

Disclosed herein are LED devices having lenses and methods of making the devices. The LED devices are made using an optical layer comprising a plurality of lens features. The optical layer is disposed relative to the LED die such that at least one LED die is optically coupled to at least one lens feature. A lens can then be made from the lens feature and excess optical layer removed to provide the device.

US Patent:

20030116290, Jun 26, 2003

Filed:

Dec 20, 2001

Appl. No.:

10/028025

Inventors:

Robert Davidson - Edina MN, US
Danny Anderson - No. St. Paul MN, US
Richard Gerth - White Bear Lake MN, US
David Holm - Hudson WI, US

Assignee:

3M Innovative Properties Company

International Classification:

D21C011/00

US Classification:

162/029000, 162/030100, 159/047300

Abstract:

Described is a process for concentrating weak black liquor to form strong black liquor, said process comprising: a) preconcentrating said weak black liquor; b) heating said preconcentrated weak black liquor in a heating zone under sufficient pressure to prevent said preconcentrated weak black liquor from boiling in said heating zone; c) passing said preconcentrated weak black liquor, having at least one volatile component, into an evaporation zone through one or more orifices; d) applying pressure in said evaporation zone that is lower than the vapor pressure of said preconcentrated weak black liquor as it is passed into said evaporation zone, which allows for flash evaporation of at least a portion of said at least one volatile component of said preconcentrated weak black liquor from said preconcentrated weak black liquor to form strong black liquor; e) adjusting heat in said heating zone., pressure in said heating zone and pressure in said evaporation zone to allow for evaporation of an amount of said at least one volatile component from said preconcentrated weak black liquor to form said strong black liquor; and f) collecting said strong black liquor from said evaporation zone.

US Patent:

20070286815, Dec 13, 2007

Filed:

Sep 6, 2005

Appl. No.:

11/575941

Inventors:

Kevin Bechtold - Mound MN, US
John Capecchi - Oakdale MN, US
Robert Davidson - Edina MN, US
Sarah Gunderson - Cincinnati OH, US

International Classification:

A61K 9/12
A61M 11/00

US Classification:

424045000, 128200140

Abstract:

A medicinal aerosol product and process, such as for an HFA metered dose inhaler, wherein at least one of the formulation ingredients is synthesized by running at least part of the chemical reaction to make the ingredient in a hydrofluoroalkane reaction medium.