Nathan W Schultz

US Patent:

7765698, Aug 3, 2010

Filed:

Jun 2, 2008

Appl. No.:

12/131770

Inventors:

John M. Sebastian - Oakdale MN, US
Marvin E. Jones - Grant MN, US
Fuming B. Li - Woodbury MN, US
Shih-Hung Chou - Maplewood MN, US
Nathan E. Schultz - Lakeland MN, US
Justin L. Keough - Vadnais Heights MN, US
Rahul R. Shah - Woodbury MN, US
Daniel A. Japuntich - St. Paul MN, US

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

B23P 15/16
B01D 21/00
B01L 9/00

US Classification:

2989662, 29825, 210490, 21050021, 210506, 422101, 4273935, 4274071, 428354, 428357, 4352865, 4352886, 442 63, 442164, 442357, 442365, 521 27, 521 30, 528422

Abstract:

A method of making an electret article, from a polymeric article that has a zeta potential of greater than or less than −7. 5 millivolts. The article is charged by contacting it with an aqueous liquid that has a pH and conductivity as follows: (i) if the article has a zeta potential of −7. 5 mV or less, then the contacting liquid has pH greater than 7 and a conductivity of 5 to 9,000 microSiemens per centimeter; and (ii) if the article has a zeta potential of greater than −7. 5 mV, then the contacting liquid has a pH of 7 or less and a conductivity of 5 to 5,500 microSiemens per centimeter. An electret article made in this manner can provide improved electret performance, particularly in electret filtration articles.

US Patent:

8512464, Aug 20, 2013

Filed:

Nov 16, 2010

Appl. No.:

12/947252

Inventors:

Guy D. Joly - Shoreview MN, US
Nathan E. Schultz - Lakeland MN, US
Encai Hao - Woodbury MN, US

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

C09D 1/00
C07C 69/52
C07C 229/38

US Classification:

10628719, 560125

Abstract:

The present disclosure relates to surface-modified zirconia nanoparticles, methods for making and using the same, and high index of refraction films made therefrom. The provided zirconia nanoparticles are surface modified with ligands that include N-hydroxyurea functionalities. The provided ligands also can contain compatibilizing groups that allow the provided surface-modified zirconia nanoparticles to be incorporated into an organic matrix. High index of refraction films can be made using these organic matrices.

US Patent:

20110245376, Oct 6, 2011

Filed:

Dec 17, 2009

Appl. No.:

13/133878

Inventors:

William J. Schultz - North Oaks MN, US
Chad A. Haraldson - Apple Valley MN, US
Nathan E. Schultz - Lakeland MN, US
Wendy L. Thompson - Roseville MN, US
James E. Thorson - Hudson WI, US
Douglas P. Goetz - St. Paul MN, US
Steven C. Hackett - Oakdale MN, US
James M. Nelson - Woodbury MN, US

International Classification:

C08L 63/00
C08L 21/00

US Classification:

523400, 525523, 525533, 525122

Abstract:

Compositions comprising surface-modified nanocalcite particles dispersed in a curable resin, and to coatings and fibrous composites incorporating such compositions are described. The surface-modifying agents include a binding group ionically associated with the calcite and a compatiblizing segment, compatible with the curable resin. The surface-modifying agent may also include a reactive group capable of reacting with the curable resin. Methods of preparing nanocalcite composites and coating a fibrous composites prepared from such nanocalcite composites are also described.

US Patent:

20130338251, Dec 19, 2013

Filed:

Dec 13, 2011

Appl. No.:

13/991578

Inventors:

Guy D. Joly - Shoreview MN, US
Nathan E. Schultz - Lakeland MN, US
Babu N. Gaddam - Woodbury MN, US

Assignee:

3M INNOVATIVE PROPERTIES COMPANY - St. Paul MN

International Classification:

C08F 22/10
C07C 323/52
C07C 259/06

US Classification:

522181, 556 51, 560129, 562621, 522182

Abstract:

Surface-modified zirconia nanoparticles include zirconia nanoparticles and surface-modifying ligands attached to the zirconia nanoparticles. The ligand includes a hydroxamate functionality, and either a reactive group or an oligomeric group. Reactive groups include chain transfer groups or photoinitiator groups. Oligomeric groups include poly(meth)acrylate or poly(meth)acrylamide groups. Articles can be prepared that include the surface-modified zirconia nanoparticles in an organic matrix.

US Patent:

20220401862, Dec 22, 2022

Filed:

Dec 1, 2020

Appl. No.:

17/776868

Inventors:

- St. Paul MN, US
John M. Brandner - St. Paul MN, US
Nathan E. Schultz - Woodbury MN, US
John M. Sebastian - Oakdale MN, US

International Classification:

B01D 39/16
D06M 10/02
D04H 3/007

Abstract:

Charged polymeric webs, such as electret webs, include a thermoplastic resin and a charge-enhancing additive. The additives are substituted benzothiazole compounds or substituted benzoxazole compounds. The substituent groups may be hydroxyl, mercapto, or aromatic groups. The electret webs may be a non-woven fibrous web or a film. The electret webs are suitable for use as filter media.

US Patent:

20220410045, Dec 29, 2022

Filed:

Nov 24, 2020

Appl. No.:

17/777551

Inventors:

- St. Paul MN, US
Anthony F. Schultz - Forest Lake MN, US
Duane D. Fansler - Dresser WI, US
John M. Brandner - St. Paul MN, US
Nathan E. Schultz - Woodbury MN, US
John M. Sebastian - Oakdale MN, US

International Classification:

B01D 39/16

Abstract:

Charged polymeric webs, such as electret webs, include a thermoplastic resin and a charge-enhancing additive. The additives are a mercapto-benzothiazole salts or mercapto-benzoxazole salts. The electret webs may be a non-woven fibrous web or a film. The electret webs are suitable for use as filter media.

US Patent:

20220380574, Dec 1, 2022

Filed:

Oct 15, 2020

Appl. No.:

17/762782

Inventors:

- St. Paul MN, US
Nathan E. Schultz - Woodbury MN, US
John M. Brandner - St. Paul MN, US

International Classification:

C08K 5/3475
C08K 5/3477
C08K 5/47
C08J 5/18
B01D 39/16
B03C 3/28
D06M 10/02
D04H 3/007
D04H 3/16

Abstract:

Charged polymeric webs, such as electret webs, include a thermoplastic resin and a charge-enhancing additive. The charge-enhancing additive is a dual-function charge-enhancing additive that enhances the charge of the electret and also has anti-microbial properties. The additives are substituted-benzimidazole or substituted-benzothiazole compounds. The electret webs may be a non-woven fibrous web or a film. The electret webs are suitable for use as filter media.

US Patent:

20220242089, Aug 4, 2022

Filed:

Jun 9, 2020

Appl. No.:

17/595591

Inventors:

- St. Paul MN, US
Tien Tsung Wu - Woodbury MN, US
Nathan E. Schultz - Woodbury MN, US
Gerry A. Hoffdahl - Scandia MN, US

International Classification:

B32B 5/24
B32B 5/18
B32B 5/02
B32B 5/08
H01M 50/249
C08K 3/32
C08K 3/34
C08J 9/36

Abstract:

A flame retardant foam. The flame retardant foam includes a from 25 to 75 wt % polyvinyl alcohol foam; and a from 25 to 95 wt % fire retardant coated on the polyvinyl alcohol foam, wherein the fire retardant comprises ammonium polyphosphate or sodium metasilicate; wherein the thickness of the foam is from 2 mm to 1 cm.