Aaron By Att Sarafinas

US Patent:

7029641, Apr 18, 2006

Filed:

Oct 3, 2002

Appl. No.:

10/263629

Inventors:

John Hiroshi Yamamoto - Haverhill MA, US
Won Suh Park - North Andover MA, US
Aaron Sarafinas - Ivyland PA, US
Michael Miller Cook - Boxford MA, US
Stephen Gerard Maroldo - Ambler PA, US

Assignee:

Rohm and Haas Company - Philadelphia PA

International Classification:

C01B 35/00

US Classification:

423287

Abstract:

The present invention relates to a method of making lithium borohydride that gives high yields while maintaining ease of purification.

US Patent:

7275928, Oct 2, 2007

Filed:

Nov 23, 2004

Appl. No.:

10/996199

Inventors:

David M. Kolesar - Gulph Mills PA, US
Robert L. Post - Ivyland PA, US
Alan H. Saikin - Landenberg PA, US
Aaron Sarafinas - Ivyland PA, US

Assignee:

Rohm and Haas Electronic Materials CMP Holdings, Inc. - Newark DE

International Classification:

B29C 44/06
B01F 13/02

US Classification:

425447, 366137, 366139

Abstract:

The present invention provides an apparatus for forming a chemical mechanical polishing pad, comprising a tank with polymeric materials, a storage silo with microspheres and a curative storage tank with curing agents. The apparatus further provides a premix prep tank for forming a pre-mixture of the polymeric materials and the microspheres and a recirculation loop in the premix prep tank for recirculating the pre-mixture until a desired bulk density is reached. The apparatus further provides a premix run tank for storing the pre-mixture, a mixer for forming a mixture of the pre-mixture and the curing agents and a mold for molding the mixture.

US Patent:

7947748, May 24, 2011

Filed:

Dec 29, 2008

Appl. No.:

12/317768

Inventors:

John David Finch - North Wales PA, US
Aaron Sarafinas - Ivyland PA, US
Andrew M. Savo - Cherry Hill NJ, US

Assignee:

Rohm and Haas Company - Philadelphia PA

International Classification:

B01J 39/20

US Classification:

521 38, 521 29, 521 30, 521 31

Abstract:

A method for preparing monodisperse crosslinked bead polymers by introducing droplets having a harmonic mean size from 50 to 1500 microns and comprising at least one monomer, at least one crosslinker and a free-radical polymerization initiator into an aqueous medium through orifices to produce an aqueous suspension of droplets having a volume fraction of droplets from 35 to 64%; wherein the droplets are not encapsulated; causing the aqueous suspension of droplets to flow in a downward direction in a pipe in which the temperature is maintained at least 20 C. below the temperature at which the polymerization initiator has a half-life of 1 hour; and polymerizing the droplets in a reactor.

US Patent:

20060058427, Mar 16, 2006

Filed:

Aug 22, 2005

Appl. No.:

11/208899

Inventors:

Julia O'Neill - Glenside PA, US
Aaron Sarafinas - Ivyland PA, US
Scott Snyder - Robesonia PA, US

International Classification:

B01F 5/04

US Classification:

523319000

Abstract:

The present invention provides methods of making sticky powder comprising mixing one or more resin or (co)polymer powders in one or more mixing devices without agglomerating the powders and while measuring the power, work or torque drawn by the mixing devices, the mixing continuing until the measure of the power or torque drawn indicates that the powders have become sticky. The mixing further comprises adding to the powders one or more dry materials and mixing to so that the dry materials adhere or “bond” to the sticky powders. Alternatively, the methods further comprise slowing or stopping the mixing, or cooling while mixing once the said sticky powders have been formed, adding one or more dry materials to form a sticky powder mixture, and further mixing to bond the sticky powders and the dry materials together. The dry materials may comprise one or more flake materials, e.g. metallic flakes; layered pigments, clays, catalysts or antimicrobials; resins or (co)polymers; cyroprocessed materials, and materials encapsulated or dispersed in brittle materials. The methods may be automated.

US Patent:

20090275769, Nov 5, 2009

Filed:

Apr 30, 2009

Appl. No.:

12/387403

Inventors:

Rajiv Manohar Banavali - Rydal PA, US
Robert Tryon Hanlon - Philadelphia PA, US
Aaron Sarafinas - Ivyland PA, US
Alfred Karl Schultz - Maple Glen PA, US
Cheryl Irene Teich - Chalfont PA, US
Jose Antonio Trejo - Lansdale PA, US

International Classification:

C11C 3/04

US Classification:

554172

Abstract:

A continuous process for esterification of fatty acids in glyceryl esters with C-Caliphatic alcohols in a tubular reactor. The method uses an expanded resin catalyst bed in the tubular reactor.

US Patent:

60639296, May 16, 2000

Filed:

Feb 2, 1999

Appl. No.:

9/241901

Inventors:

Kathleen Anne Kas - Lindenwold NJ
Aaron Sarafinas - Ivyland PA
Randall Wayne Stephens - Perkasie PA

Assignee:

Rohm and Haas Company - Philadelphia PA

International Classification:

C07D41704

US Classification:

5462704

Abstract:

The present invention relates to a method to prepare 2-pyridyl substituted dihydrothiazoles.

US Patent:

20150231758, Aug 20, 2015

Filed:

Feb 19, 2014

Appl. No.:

14/184286

Inventors:

- Newark DE, US
Alan Saikin - Landenberg PA, US
David Kolesar - Gulph Mills PA, US
Aaron Sarafinas - Ivyland PA, US
Robert L. Post - Ivyland PA, US

International Classification:

B24B 37/24
B24D 3/32
B24D 18/00

Abstract:

A method of making a polishing layer for polishing a substrate selected from at least one of a magnetic substrate, an optical substrate and a semiconductor substrate is provided, comprising: providing a liquid prepolymer material; providing a plurality of hollow microspheres; exposing the plurality of hollow microspheres to a carbon dioxide atmosphere for an exposure period to form a plurality of treated hollow microspheres; combining the liquid prepolymer material with the plurality of treated hollow microspheres to form a curable mixture; allowing the curable mixture to undergo a reaction to form a cured material, wherein the reaction is allowed to begin ≦24 hours after the formation of the plurality of treated hollow microspheres; and, deriving at least one polishing layer from the cured material; wherein the at least one polishing layer has a polishing surface adapted for polishing the substrate.

US Patent:

20150231765, Aug 20, 2015

Filed:

Feb 19, 2014

Appl. No.:

14/184328

Inventors:

- Newark DE, US
Aaron Sarafinas - Ivyland PA, US
Alan Saikin - Landenberg PA, US
Robert L. Post - Ivyland PA, US

International Classification:

B24D 11/00

Abstract:

A method of making a polishing layer for polishing a substrate is provided, comprising: providing a liquid prepolymer material; providing a plurality of hollow microspheres; exposing the plurality of hollow microspheres to a vacuum to form a plurality of exposed hollow microspheres; treating the plurality of exposed hollow microspheres with a carbon dioxide atmosphere to form a plurality of treated hollow microspheres; combining the liquid prepolymer material with the plurality of treated hollow microspheres to form a curable mixture; allowing the curable mixture to undergo a reaction to form a cured material, wherein the reaction is allowed to begin ≦24 hours after the formation of the plurality of treated hollow microspheres; and, deriving at least one polishing layer from the cured material; wherein the at least one polishing layer has a polishing surface adapted for polishing the substrate.