Anil C Kohli

US Patent:

6585921, Jul 1, 2003

Filed:

Jun 26, 2001

Appl. No.:

09/681919

Inventors:

Anil Kohli - Midlothian VA

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

B27N 302

US Classification:

264112, 264119, 264122

Abstract:

The present invention provides a cardable fiber blend which forms a moldable fiber batt, the blend comprising fibers having a modulus of 550 g/denier or more with fibers of a thermoplastic polymer wherein the high modulus polymer fibers are all uncrimped fibers or a mixture of crimped and uncrimped fibers. The moldable batt is useful in making speaker cones.

US Patent:

6586092, Jul 1, 2003

Filed:

Jun 28, 2001

Appl. No.:

09/681933

Inventors:

Anil Kohli - Midlothian VA

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

D02G 300

US Classification:

428362, 428359, 442414, 442415

Abstract:

The present invention provides a cardable fiber blend which forms a moldable fiber batt, the blend comprising fibers having a modulus of 550 g/denier or more with fibers of a thermoplastic polymer wherein the high modulus polymer fibers are all uncrimped fibers or a mixture of crimped and uncrimped fibers. The moldable batt is useful in making speaker cones.

US Patent:

7456120, Nov 25, 2008

Filed:

Sep 13, 2006

Appl. No.:

11/520370

Inventors:

Anil Kohli - Midlothian VA, US
Herman Hans Forsten - Williamsburg VA, US
Kurt Hans Wyss - Chavannes de Bogis, CH

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

D04H 1/00
D04H 13/00
D04H 3/00
D04H 5/00

US Classification:

442415, 428902, 428920, 428921, 442402, 442408, 442414

Abstract:

This invention relates to a bag filter having a tubular section, one closed end and one open end, the tubular section having a nonwoven felt comprising an intimate fiber blend of 50 to 80 parts by weight meta-aramid fiber and 20 to 50 parts by weight acrylic fiber, based on the total weight of meta-aramid and acrylic fibers in the felt, wherein the acrylic fiber has an equal or lower denier per filament than the meta-aramid fiber.

US Patent:

7485592, Feb 3, 2009

Filed:

Sep 13, 2006

Appl. No.:

11/520369

Inventors:

Anil Kohli - Midlothian VA, US
Herman Hans Forsten - Williamsburg VA, US
Kurt Hans Wyss - Chavannes De Borgis, CH

Assignee:

E.I. du Pont de Nemours and Company - Wilmington DE

International Classification:

D04H 1/00
D04H 13/00
D04H 3/00
D04H 5/00

US Classification:

442415, 442402, 442408, 442414, 428902, 428920, 428921, 55361

Abstract:

This invention relates to a bag filter having a tubular section, one closed end and one open end, the tubular section having a nonwoven felt comprising an intimate fiber blend of 50 to 80 parts by weight polyphenylene sulfide fiber and 20 to 50 parts by weight acrylic fiber, based on the total weight of polyphenylene sulfide and acrylic fibers in the felt, wherein the acrylic fiber has an equal or lower denier per filament than the polyphenylene sulfide fiber.

US Patent:

7819936, Oct 26, 2010

Filed:

Aug 22, 2007

Appl. No.:

11/894976

Inventors:

Anil Kohli - Midlothian VA, US
Kurt Hans Wyss - Bogis, SZ

Assignee:

E.I. du Pont de Nemours and Company - Wilmington DE

International Classification:

B01D 39/02
B01D 39/04
D04H 1/54

US Classification:

55527, 55528, 442411

Abstract:

This invention relates to a filter felt and bag filters comprising an intimate staple fiber blend of 20 to 75 parts by weight polymeric staple fiber containing a polymer or copolymer derived from a monomer selected from the group consisting of 4,4′diaminodiphenyl sulfone, 3,3′diaminodiphenyl sulfone, and mixtures thereof; and 25 to 80 parts by weight of a heat resistant staple fiber selected from the group consisting on meta-aramid fiber, acrylic fiber, polyphenylene sulfide fiber, and para-aramid fiber; based on 100 parts by weight of the polymeric fibers and heat resistant fibers in the felt.

US Patent:

8114180, Feb 14, 2012

Filed:

Jul 20, 2009

Appl. No.:

12/505780

Inventors:

Anil Kohli - Midlothian VA, US
Kurt Hans Wyss - Chavannes De Bogis, CH

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

B01D 46/02

US Classification:

55381, 55528

Abstract:

This invention relates to a bag filter having a tubular section, a closed end, and an open end; the tubular section comprising a scrimless filter felt consisting essentially of a needle-punched batt of an intimate blend of fibers consisting of 50 to 79 percent by weight meta-aramid staple fiber, and 21 to 50 percent by weight para-aramid staple fiber; said needle-punched batt having a basis weight of from 10 to 17 ounces per square yard (340 to 580 grams per square meter).

US Patent:

8343250, Jan 1, 2013

Filed:

May 2, 2007

Appl. No.:

11/799562

Inventors:

Antoine Schelling - Geneva, CH
Kurt Hans Wyss - Chavannes De Bogis, CH
Glen E. Simmonds - Avondale PA, US
Anil Kohli - Midlothian VA, US

Assignee:

E I du Pont de Nemours and Company - Wilmington DE

International Classification:

B01D 46/00

US Classification:

55486, 55382, 55487, 55527

Abstract:

A bag filter having a support structure clothed in a filter bag. The cloth of the filter bag is a composite of at least one substrate layer and at least one nanoweb bonded thereto in a face-to-face relationship. The nanoweb is positioned at the surface of the filter bag first exposed to the hot particle laden gas stream and can have a basis weight of greater than about 2 gsm.

US Patent:

8394155, Mar 12, 2013

Filed:

Nov 7, 2008

Appl. No.:

12/266770

Inventors:

Anil Kohli - Midlothian VA, US
Antoine Schelling - Geneva, CH
Kurt Hans Wyss - Chavannes de Bogis, CH
B. Lynne Wiseman - Richmond VA, US
Young H Kim - Hockessin DE, US
Hageun Suh - Chadds Ford PA, US

International Classification:

B01D 46/02

US Classification:

55382, 55486, 55524, 55DIG 2, 15347

Abstract:

A bag filter having a support structure clothed in a filter bag. The cloth of the filter bag is a composite of at least one substrate layer and at least one nanoweb bonded thereto in a face-to-face relationship. The nanoweb is positioned at the surface of the filter bag first exposed to the hot particle laden gas stream and can have a basis weight of greater than about 0. 1 gsm.