Richard M Wu

US Patent:

6353087, Mar 5, 2002

Filed:

Aug 17, 2000

Appl. No.:

09/641166

Inventors:

James Michael Lipovsky - Langhorne PA
Dawn Marie McFadden - Yardley PA
Richard Shu-Hua Wu - Fort Washington PA

Assignee:

Rohm and Haas Company - Philadelphia PA

International Classification:

C08J 300

US Classification:

528481, 528500

Abstract:

This invention relates to a process for stripping polymer reaction compositions. The process reduces gel in the polymer reaction composition by adjusting the pH of the polymer to from 7 to 11 prior to stripping and maintaining the adjusted pH during stripping, maintaining the temperature of the polymer at from 30Â C. to 70Â C. during stripping, utilizing a continuous stripping operation, or combinations thereof.

US Patent:

6515082, Feb 4, 2003

Filed:

May 3, 2000

Appl. No.:

09/564450

Inventors:

Jeffrey Lewis Brown - North Wales PA
Dennis Patrick Stack - Warrington PA
Richard Shu-Hua Wu - Fort Washington PA

Assignee:

Rohm And Haas Company - Philadelphia PA

International Classification:

C08F 216

US Classification:

526 64, 526200

Abstract:

This invention relates to a process for preparing polymers which contain as polymerized units hydrophobic monomers wherein a stable emulsion is formed and the formation of suspension particles is minimized. The process includes making a concentrated monomer emulsion, diluting the concentrated monomer emulsion with water, feeding the diluted monomer emulsion to a reactor, and polymerizing the monomer.

US Patent:

6723161, Apr 20, 2004

Filed:

Nov 18, 2002

Appl. No.:

10/298894

Inventors:

Eric Jon Langenmayr - Bryn Mawr PA
Richard Shu-Hua Wu - Fort Washington PA

Assignee:

Rohm and Haas Company - Philadelphia PA

International Classification:

C08K 500

US Classification:

106493, 106 316, 106412, 106478, 106494, 106495, 106496, 106497, 106498

Abstract:

A method for oxidizing an organic pigment including dispersing the pigment in an aqueous medium and exposing the dispersed pigment to ultrasonic radiation, whereby the exposed pigment exhibits from 3 to 10 microequivalents of carboxylic acid, or salts thereof, per square meter of pigment surface.

US Patent:

6896212, May 24, 2005

Filed:

Sep 4, 2003

Appl. No.:

10/655266

Inventors:

Vere Orland Archibald - North Wales PA, US
Richard Shu-Hua Wu - Fort Washington PA, US

Assignee:

Rohm and Haas Company - Philadelphia PA

International Classification:

B02C017/16

US Classification:

241 21, 241 29, 241184

Abstract:

A method of using polymeric grinding media to produce fine solid particles or fine solid dispersions in liquid, such as pigment dispersions for inks, is provided. The method of the present invention limits packing and plugging problems associated with polymeric media to allow efficient milling operation.

US Patent:

7025820, Apr 11, 2006

Filed:

Nov 3, 2003

Appl. No.:

10/700079

Inventors:

Tabb Robertson Champlin - Ambler PA, US
Stephen Andrew Crescimanno - Hatfield PA, US
Eric Jon Langenmayr - Bryn Mawr PA, US
Richard Shu-Hua Wu - Fort Washington PA, US

Assignee:

Rohm and Haas Company - Philadelphia PA

International Classification:

C09D 11/00
C09C 1/22
C01F 7/02

US Classification:

106 319, 106 316, 106473, 106480, 423600

Abstract:

A method for forming an aqueous carbon black dispersion including providing a reaction mixture including carbon black having a DBP uptake of greater than 90 cc/100 g of the carbon black, a monovalent ion persulfate, an aqueous medium, and, in some embodiments, a strong acid; subjecting the reaction mixture to a first temperature of from 40 C. to 90 C. for from 2 hours to 24 hours; neutralizing the reaction mixture to a pH greater than 7. 0, and, in certain embodiments, subjecting the neutralized reaction mixture to a second temperature of from 20 C. to 40 C. higher than the first temperature for from 2 hours to 12 hours is provided. In an alternative aspect carbon black having a particle diameter less than 18 nanometers in diameter and a DBP uptake of less than 70 cc/100 g carbon black is provided. The aqueous carbon black dispersion so formed and an aqueous inkjet ink containing the aqueous carbon black dispersion are also provided.

US Patent:

20040143053, Jul 22, 2004

Filed:

Jan 7, 2004

Appl. No.:

10/752893

Inventors:

Richard Wu - Fort Washington PA, US
David Pierce - Warrington PA, US
Owen Hallerud - Mt. Laurel NJ, US

International Classification:

C08K003/00

US Classification:

524/556000

Abstract:

A method of preparing an emulsion polymer having a low residual monomer content, wherein the method includes the simultaneous addition of an oxidizing agent and a reducing agent to different locations on the process side of a heat exchanger is provided.

US Patent:

20070280848, Dec 6, 2007

Filed:

Mar 24, 2005

Appl. No.:

10/593809

Inventors:

Jagdish Narayan - Raleigh NC, US
Prabhat Kumar - Framingham MA, US
Richard Wu - Chelmsford MA, US

International Classification:

B05D 5/12
C22C 27/02

US Classification:

420427000, 427124000, 977810000

Abstract:

Thin tantalum films having novel microstructures are provided. The films have microstructures such as nanocrystalline, single crystal and amorphous. These films provide excellent diffusion barrier properties and are useful in microelectronic devices. Methods of forming the films using pulsed laser deposition (PLD) and molecular beam epitaxy (MBE) deposition methods are also provided, as are microelectronic devices incorporating these films.

US Patent:

54990084, Mar 12, 1996

Filed:

Apr 11, 1994

Appl. No.:

8/226127

Inventors:

Evelyn Rosenkrantz - Sherman Oaks CA
Richard Wu - Fullerton CA

International Classification:

G08B 300

US Classification:

3403847

Abstract:

An apparatus is provided for providing artificial sounds in the vicinity of a toilet. It includes a housing attachable in the vicinity of a toilet and an electronic sound system which is contained within the housing and is activatable by a user of the toilet so as to block out the noise of eliminating. The sound system includes a speech processing microprocessor for providing an electronic signal representing a desired sound. A memory storage device is connected to the speech processing microprocessor for electronically storing a digital representation of the desired sound to be processed by the speech processing microprocessor. A counter is connected to the memory storage device. The counter has a clock for generating an address for the speech processing microprocessor. A variable resister is attached to the speech processing microprocessor for controlling a rate of the clock, and thereby controlling the quality of the desired sound. A switch is connected to the speech processing microprocessor for turning on the desired sound.