Feng Liang

US Patent:

7728135, Jun 1, 2010

Filed:

Jan 5, 2006

Appl. No.:

11/326154

Inventors:

Xiongwei Shi - Edison NJ, US
Man Zhu - Clark NJ, US
William Leong - Westfield NJ, US
Vilas Dahanukar - Hyderabad, IN
Ilia A. Zavialov - Princeton NJ, US
Cecelia Proietti - Clark NJ, US
Shannon Zhao - Littleton MA, US
Hong-Chang Lee - Livingston NJ, US
Yi Liu - Clark NJ, US
Hoa N. Nguyen - Dayton NJ, US
Wenxue Wu - Princeton Junction NJ, US
Bosco D'Sa - Edison NJ, US
Feng Liang - Monmouth Junction NJ, US
Loc Thanh Tran - Parsippany NJ, US

Assignee:

Schering Corporation - Kenilworth NJ

International Classification:

C07D 401/14
C07D 403/12
A61K 31/506
A61K 31/18

US Classification:

544295, 544364, 544335

Abstract:

The present invention is directed to the synthesis of 4-[4-[(R)-[1-[cyclopropylsulfonyl)-4-piperidinyl](3-fluorophenyl)methyl]-3(S)-methyl-1-piperazinyl]-1-[(4,6-dimethyl-5-pyrimidinyl)carbonyl]-4-methylpiperidine], and intermediates therefor from readily available starting materials by a novel route.

US Patent:

7758841, Jul 20, 2010

Filed:

Mar 11, 2005

Appl. No.:

10/592463

Inventors:

W. Edward Billups - Houston TX, US
Anil K. Sadana - Houston TX, US
Feng Liang - Houston TX, US
Robert H. Hauge - Houston TX, US

Assignee:

William Marsh Rice University - Houston TX

International Classification:

D01F 9/12

US Classification:

4234471, 4234472, 423448, 4234491, 4234492

Abstract:

The present invention is directed to novel processes for the functionalization (derivatization) of carbon nanotubes and, as an extension, to fullerenes and other carbon surfaces. Generally, such processes involve reductive pathways. In some embodiments, carbon nanotubes are reacted with alkali metal and organic halides in anhydrous liquid ammonia. In other embodiments, polymers are grown from carbon nanotube sidewalls by reacting carbon nanotubes with alkali metal and monomer species in anhydrous liquid ammonia.

US Patent:

8584754, Nov 19, 2013

Filed:

Feb 28, 2013

Appl. No.:

13/780266

Inventors:

Loan K. Vo - Houston TX, US
Feng Liang - Houston TX, US
Jimmie D. Weaver - Duncan OK, US

Assignee:

Halliburton Energy Services, Inc. - Houston TX

International Classification:

E21B 43/04
E21B 33/13

US Classification:

166278, 166276, 1662801, 166300

Abstract:

Delayed-tackifier coated particulates and treatment fluids comprising delayed-tackifier coated particulates wherein the tackifier is associated with a surfactant. The treatment fluids may be used in methods that include providing a treatment fluid that comprises an aqueous base fluid and a delayed-tackifier coated particulate and introducing that treatment fluid into a wellbore penetrating a subterranean formation. Once within the formation, forming a particulate pack, wherein the particulate pack is a gravel pack along a portion of the wellbore, a proppant pack within a portion of the subterranean formation, or both.

US Patent:

20070110658, May 17, 2007

Filed:

Sep 6, 2006

Appl. No.:

11/516426

Inventors:

Feng Liang - Houston TX, US
W. Billups - Houston TX, US

Assignee:

William Marsh Rice University - Houston TX

International Classification:

D01F 9/12

US Classification:

423447100, 977847000

Abstract:

The present invention provides for novel methods of generating phenyl sulfonated single-wall carbon nanotubes (1), particularly wherein such phenyl sulfonated single-wall carbon nanotubes can be dissolved in water as true solutions and provide a platform for a variety of biomedical applications.

US Patent:

20100036125, Feb 11, 2010

Filed:

Oct 16, 2009

Appl. No.:

12/580855

Inventors:

Xiongwei Shi - Edison NJ, US
Man Zhu - Clark NJ, US
William Leong - Westfield NJ, US
Vilas Dahanukar - Hyderabad, IN
Ilia A. Zavialov - Princeton NJ, US
Cecilia Proietti - Westfield NJ, US
Shannon Zhao - Littleton MA, US
Hong-Chang Lee - Livingston NJ, US
Yi Liu - Iselin NJ, US
Hoa N. Nguyen - Dayton NJ, US
Wenxue Wu - Princeton Junction NJ, US
Bosco D'Sa - Edison NJ, US
Feng Liang - Monmouth Junction NJ, US
Loc Thanh Tran - Piscataway NJ, US

International Classification:

C07D 401/06
C07D 211/30

US Classification:

544360, 546248

Abstract:

The present invention is directed to the synthesis of 4-[4-[(R)-[1-[cyclopropylsulfonyl)-4-piperidinyl](3-fluorophenyl)methyl]-3(S)-methyl--piperazinyl]-1-[(4,6-dimethyl-5-pyrimidinyl)carbonyl]-4-methylpiperidine], and intermediates therefor from readily available starting materials by a novel route.

US Patent:

20100063280, Mar 11, 2010

Filed:

Dec 20, 2007

Appl. No.:

12/519729

Inventors:

John F. Traverse - Roselle Park NJ, US
Shen-Chun Kuo - Union NJ, US
Feng Liang - Monmouth Junction NJ, US
William W. Leong - Westfield NJ, US

International Classification:

C07D 403/14

US Classification:

544295

Abstract:

The present invention discloses a novel process to prepare 4-substituted 1-Cyclopropane-sulfonyl-Piperidinyl compounds, which are useful intermediates for the preparation of antagonists of CCR5 receptor and therefore useful for the treatment of HIV virus infected mammals. It specifically discloses a novel process to synthesize 4-[4-[(R)-[1-[cyclopropylsulfonyl)-4-piperidinyl](3-fluorophenyl)methyl]-3(S)-methyl-1-piperazinyl]-1-[(4,6-dimethyl-5-pyrimidinyl)carbonyl]-4-methylpiperidine] compounds.

US Patent:

20120024526, Feb 2, 2012

Filed:

Oct 4, 2011

Appl. No.:

13/252373

Inventors:

Feng Liang - Cypress TX, US
Bradley L. Todd - Duncan OK, US
Rajesh K. Saini - Cypress TX, US

International Classification:

E21B 43/04

US Classification:

166278

Abstract:

A method for diverting fluids across a perforation tunnel in high-rate water pack operations may include providing a wellbore extending into a subterranean formation, wherein a perforation tunnel provides a fluid connection between the wellbore and the subterranean formation; providing a diverting particulate that comprises a degradable plasticized polymer coating on a particulate; placing the diverting particulate into the perforation tunnel, wherein the step of placing the diverting particulate forms a particulate pack within the subterranean formation and the perforation tunnel; allowing the degradable plasticized polymer coating to deform and fill the interstitial spaces within the particulate pack in the perforation tunnel such that the fluid conductivity between the wellbore and the subterranean formation is substantially blocked; and allowing the plasticized polymer coating to degrade over time thereby substantially restoring the fluid conductivity between the wellbore and the subterranean formation.

US Patent:

20130025859, Jan 31, 2013

Filed:

Jul 29, 2011

Appl. No.:

13/193844

Inventors:

Feng Liang - Cypress TX, US
Stanley J. Heath - Duncan OK, US
Bradley L. Todd - Duncan OK, US

International Classification:

E21B 43/04
C09K 8/60

US Classification:

166278, 507219, 507225, 507205, 507221, 507231, 507224, 507220, 507230

Abstract:

Methods including providing a downhole tool or a component thereof comprising a plasticized polymer composition that comprises a polymer and a water-soluble plasticizer, wherein the plasticized polymer composition has a first deflection test value; exposing the downhole tool or the component thereof to an aqueous-based medium; allowing the water-soluble plasticizer to leach out of the downhole tool or the component thereof, wherein the plasticized polymer composition has a second deflection test value after exposure to the aqueous-based medium, and wherein the second deflection test value is less than about 10% of the first deflection test value; and placing the downhole tool or the component thereof in a subterranean formation.