Larry Yen resumes & CV records
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Larry M Yen, 96160 Stanton Ave UNIT 640, Auburndale, MA 02466
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Us Patents
Skinned Hollow Fiber Membrane And Method Of Manufacture
US Patent:
6921482, Jul 26, 2005
Filed:
Jan 27, 2000
Appl. No.:
09/889961
Inventors:
Kwok-Shun Cheng - Nashua NH, US
T. Dean Gates - Bedford MA, US
Larry Y. Yen - Andover MA, US
Rajnikant B. Patel - Tewksbury MA, US
T. Dean Gates - Bedford MA, US
Larry Y. Yen - Andover MA, US
Rajnikant B. Patel - Tewksbury MA, US
Assignee:
Mykrolis Corporation - Billerica MA
International Classification:
B01D069/00
B01D071/28
B01D071/28
US Classification:
21050023, 21050036, 21050027, 210640, 2103218, 95 46, 264 41
Abstract:
Hollow fiber membranes having a skinned surface on one diameter, and a porous surface on the opposite diameter arm produced from perfluorinated thermoplastic polymers by extruding a heated solution of the polymer having a lower critical solution temperature directly into a cooling bath to form the porous membrane by liquid-liquid phase separation. Extrusion can be conducted either vertically or horizontally. The hollow fiber membranes are useful as ultrafiltration membranes and as membrane contactors.
Skinned Hollow Fiber Membrane And Method Of Manufacture
US Patent:
6977043, Dec 20, 2005
Filed:
Mar 17, 2004
Appl. No.:
10/704111
Inventors:
Kwok-Shun Cheng - Nashua NH, US
T. Dean Gates - Bedford MA, US
Larry Y. Yen - Andover MA, US
Rajnikant B. Patel - Tewksbury MA, US
T. Dean Gates - Bedford MA, US
Larry Y. Yen - Andover MA, US
Rajnikant B. Patel - Tewksbury MA, US
Assignee:
Mykrolis Corporation - Billerica MA
International Classification:
B01D039/00
US Classification:
21050023, 21050027, 21050036, 2641761, 26417712, 26417714, 26417719, 264 41
Abstract:
Hollow fiber membranes having a skinned surface on one diameter, and a porous surface on the opposite diameter are produced from perfluorinated thermoplastic polymers by extruding a heated solution of the polymer having a low critical solution temperature directly into a cooling bath to form the porous membrane by liquid-liquid phase separation. Extrusion can be conducted either vertically or horizontally. The hollow fiber membranes are useful as ultrafiltration membranes and as membrane contactors.
Perfluorinated Thermoplastic Filter Cartridge
US Patent:
7347937, Mar 25, 2008
Filed:
Jan 28, 2000
Appl. No.:
09/890290
Inventors:
Kwok-Shun Cheng - Nashua NH, US
Cha P. Doh - Sudbury MA, US
Larry Y. Yen - Andover MA, US
Rajnikant B. Patel - Tewksbury MA, US
T. Dean Gates - Bedford MA, US
Cha P. Doh - Sudbury MA, US
Larry Y. Yen - Andover MA, US
Rajnikant B. Patel - Tewksbury MA, US
T. Dean Gates - Bedford MA, US
Assignee:
Entegris, Inc. - Chaska MN
International Classification:
B01D 63/06
B01D 63/00
B01D 63/00
US Classification:
2104971, 21032178, 2103232, 210342, 21032187, 21049701
Abstract:
A filtration cartridge having a housing with an inlet and an outlet and a filtration membrane contained within the housing and located between the inlet and the outlet is described. The membrane is sealed in such a manner that all fluid must flow through the membrane between entering the inlet and leaving the outlet of the housing. The entire cartridge, housing, membrane and any other components are all formed of one or more perfluorinated thermoplastic resins. These resins preferably are PFA, MFA, FEP and blends thereof. The membrane may be in the form of hollow fibers, wound fibers such as in a depth filter, or a flat sheet which may be formed into various configurations such as spiral filters, pleated filters, spiral pleated filters, disks and the like. These cartridges provide an inert, high temperature and acid/oxidative chemical resistant filter having properties similar to that of PTFE resins.
Selective Electroless Deposition And Interconnects Made Therefrom
US Patent:
2004019, Oct 7, 2004
Filed:
Jan 15, 2004
Appl. No.:
10/484017
Inventors:
Joseph Zahka - Andover MA, US
Brett Belongia - North Andover MA, US
Larry Yen - Andover MA, US
John Pillion - Brookline NH, US
Sonan Nguyen - Manchester NH, US
Brett Belongia - North Andover MA, US
Larry Yen - Andover MA, US
John Pillion - Brookline NH, US
Sonan Nguyen - Manchester NH, US
International Classification:
B05D005/12
B05D003/04
B05D003/04
US Classification:
428/304400, 427/307000, 427/437000, 428/323000
Abstract:
The present invention provides a process for forming inlaid patterns of metal into specified areas of a patterned substrate. The process, which is useful in the manufacture of semiconductor devices and circuits, comprises selectively removing seed layer from all surfaces save the trenches and vias and selectively electroless plating a metal into the patterned substrate where the seed layer remains. The present invention further provides an abrasive-free polishing-pad configured to planarize a metal plated surface, agitate chemical reagents and facilitate removal of gases generated by the electroless plating process.
Process For Removing Microbubbles From A Liquid
US Patent:
2007011, May 31, 2007
Filed:
Jan 11, 2005
Appl. No.:
10/585960
Inventors:
Larry Yen - Andover MA, US
Jay Duffner - Shirley MA, US
Saksatha Ly - Lexington MA, US
Jay Duffner - Shirley MA, US
Saksatha Ly - Lexington MA, US
International Classification:
B01D 39/14
US Classification:
210500100
Abstract:
A process is provided for removing microbubbles from a liquid by filtration with a composite porous membrane which is formed from a porous polymeric membrane having an average pore size between about 0.01 and 0.03 microns on which is directly coated a cross-linked polymer derived from N,N-methylenebisacrylamide (MBAM) optionally containing dimethylacrylamide (DMAM).
Multilayer Porous Membrane And Process
US Patent:
2008002, Jan 24, 2008
Filed:
Dec 21, 2005
Appl. No.:
11/793639
Inventors:
Larry Yen - Andover MA, US
Rajnikant Patel - Tewksbury MA, US
Rajnikant Patel - Tewksbury MA, US
International Classification:
B32B 25/08
B29C 44/24
C08L 23/06
C08L 23/12
C08L 27/18
B29C 44/24
C08L 23/06
C08L 23/12
C08L 27/18
US Classification:
428220000, 264045900, 428310500, 428316600, 525199000, 525240000
Abstract:
A multilayer porous membrane formed of an extrudable polymer is provided. The membrane is formed by co-extruding at least two compositions, each of which comprises a heated porogen and polymer while in contact with each other under conditions to minimize or prevent unstable interfacial flow between extruded layers. In a preferred embodiment, the two compositions are different such that the layers have a different average pore size.
Microporous Membranes Of Ultrahigh Molecular Weight Polyethylene
US Patent:
4778601, Oct 18, 1988
Filed:
Oct 9, 1984
Appl. No.:
6/658600
Inventors:
George Lopatin - Newton Centre MA
Larry Y. Yen - Tewksbury MA
Larry Y. Yen - Tewksbury MA
Assignee:
Millipore Corporation - Bedford MA
International Classification:
B01D 1300
US Classification:
21050027
Abstract:
Microporous membranes and methods for producing such membranes from ultrahigh molecular weight polyethylene are described. The method employs extrusion of a solution of UHMW-PE and porogen through a forming die followed by thermal phase separation of polymer and porogen. Microporous structures are created by removing porogen. Microporous membranes produced include membranes with good permeability to air and water making them particularly useful as filtration media and water-resistant breathable membranes.
Process For Producing Fluorocarbon Membranes And Membrane Product
US Patent:
5032274, Jul 16, 1991
Filed:
Aug 17, 1990
Appl. No.:
7/569060
Inventors:
Larry Y. Yen - Tewksbury MA
George Lopatin - Newton Centre MA
Howard Malarkey - Lowell MA
David Soane - Piedmont CA
George Lopatin - Newton Centre MA
Howard Malarkey - Lowell MA
David Soane - Piedmont CA
Assignee:
Millipore Corporation - Bedford MA
International Classification:
B01D 7132
US Classification:
21050042
Abstract:
Microporous or open ultrafiltration poly (tetrafluoroethylene-co-perfluoro-(alkyl vinyl ether)) (PFA) or poly (tetrafluoroethylene-co-hexafluoropropylene) (FEP) film membrane or hollow fibers having open pores are formed from a melt blend of 10 to 35 weight percent of the PFA or FEP and a chlorotrifluoroethylene oligomer solvent. The melt blend is shaped and one or more surfaces of the shaped melt blend are coated with the solvent prior to phase separation of the melt blend. Coating the membrane with solvent during shaping results in membrane having larger pores on that membrane surface as compared to membranes not coated with solvent. The shaped melt blend is cooled to effect phase separation and crystallization of the PFA or FEP from the blend. The solvent is separated from the PFA or FEP by extraction and the porous PFA or FEP is heat set under restraint to prevent shrinkage. In one embodiment of this invention the dry film membrane recovered after extraction or the membrane wet with extraction liquid is stretched in the cross-web direction to below its breaking limit, dried restrained and then heat-set.
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