Loc Vinh Bui

US Patent:

6347257, Feb 12, 2002

Filed:

Feb 25, 1999

Appl. No.:

09/258019

Inventors:

Bryan J. L. Bedal - Santa Clarita CA
Loc V. Bui - Valencia CA

Assignee:

3D Systems, Inc. - Valencia CA

International Classification:

G06F 1900

US Classification:

700119, 700118, 700123

Abstract:

A method, system and apparatus for forming a three-dimensional object on a layer-by-layer basis involves forming a portion of the three-dimensional object using selective deposition modeling (SDM). SDM involves using at least one orifice, such as a jet, which dispenses a droplet of a flowable material that solidifies upon being dispensed. A drop volume capability of each orifice is adjusted until substantially all orifices have a uniform drop volume capability and all dispensed droplets of the flowable material have a uniform volume.

US Patent:

6395811, May 28, 2002

Filed:

Apr 11, 2000

Appl. No.:

09/547160

Inventors:

My T. Nguyen - Kirland, CA
Vu Doan - Canoga Park CA
Kelly Kwo - Valencia CA
Loc V. Bui - Valencia CA

Assignee:

3D Systems, Inc. - Valencia CA

International Classification:

C08J 300

US Classification:

524198, 523161, 524199, 524230, 524270, 524272, 524487, 524507, 524514

Abstract:

A component to control the viscosity of phase change material formulations is made by reacting selected nucleophiles, including fatty acid/alcohol reactants with an isocyanate, is disclosed. The addition of the isocyanate and the different nucleophiles will create a viscosity modifying component of low viscosity that can be formulated with higher molecular weight polyamide resins to achieve increased toughness in phase change solid imaging materials and carrier compositions used to make phase change ink jet inks.

US Patent:

6406531, Jun 18, 2002

Filed:

Mar 7, 2000

Appl. No.:

09/520661

Inventors:

Loc V. Bui - Valencia CA
Vu Doan - Winnetka CA
Kelly Kwo - Valencia CA

Assignee:

3D Systems, Inc. - Valencia CA

International Classification:

C09K 100

US Classification:

10628735, 106 3129, 106 313, 106 3161, 106 3162, 106230, 106270, 1062873, 524227

Abstract:

Phase change compositions that are solid at ambient temperature and liquid at an elevated temperature above ambient temperature are disclosed for advantageous use in selective deposition modeling methods for building three-dimensional objects. A phase change composition according to the disclosed invention is a semi-crystalline component mixture having a freezing point of at least about 68Â C. , a melting point of at least about 88Â C. and a viscosity of about 13 centipoise at 135Â C. The composition includes a plurality of waxes having a broad melting point range and molecular weight range. Three-dimensional objects having minimal curl, delamination and stress cracks can be produced at a faster rate than heretofore known by using selective deposition modeling techniques employing the disclosed compositions.

US Patent:

6528613, Mar 4, 2003

Filed:

Jun 26, 2000

Appl. No.:

09/603213

Inventors:

Loc V. Bui - Valencia CA
My T. Nguyen - Kirland, CA

Assignee:

3D Systems, Inc. - Valencia CA

International Classification:

C08G 6344

US Classification:

528288, 528 60, 528 745, 5282955, 528335

Abstract:

A solubilizing agent and a compound made by reacting selected nucleophiles, including fatty acid reactants and amines with an isocyanate are disclosed. The addition of the isocyanate and the different nucleophiles will create a di-urethane tetra-amide solubilizing agent product. The polyamide-solubilizing agent is useful as an ingredient in a phase change solid imaging material and as carrier compositions used to make phase change ink jet inks.

US Patent:

8534819, Sep 17, 2013

Filed:

May 5, 2007

Appl. No.:

12/311637

Inventors:

Loc Bui - Moorpark CA, US
Ramesh Babu - Fullerton CA, US
Snehal Desai - Irvine CA, US
Barry Brucker - Beverly Hills CA, US
Nadeepuram K. Ranganathan - Irvine CA, US

International Classification:

G01D 11/00

US Classification:

347100, 347 95, 106 3113, 523160

Abstract:

An ink and method of its use for printing on a variety of substrates in a first aspect involves a water-insoluble colorant, water, and a primary solvent such as diacetone alcohol capable of dissolving both the water-insoluble colorant and the water. In a further aspect, the ink composition includes a secondary solvent capable of modifying the properties of the ink, the secondary solvent being selected from the group consisting of alcohols, amines, esters, glycol ethers, ketones, polyols, and keto-pyrroles. In a still further aspect, the ink may have at least two polyols, including a first polyol characterized by being semi-solid at operating temperature and a second polyol characterized by being liquid at operating temperature. In a further aspect, the ink composition includes a surfactant selected from the group consisting of hydrocarbon-based surfactants, silicone-based surfactants, and fluorosurfactants.

US Patent:

20110071249, Mar 24, 2011

Filed:

Dec 10, 2009

Appl. No.:

12/634998

Inventors:

Loc Bui - Moorpark CA, US
Ramesh Subbaraman - Fullerton CA, US
Snehal Desai - Irvine CA, US
Barry Brucker - Beverly Hills CA, US
Nadeepuram K. Ranganathan - Irvine CA, US

International Classification:

C08L 37/00
C08L 33/02
C09D 11/00
C08L 29/04
C08L 39/06
C08L 67/00
C08L 61/06

US Classification:

524549, 524556, 106 3113, 524543, 524548, 524599, 524592, 524611, 524596

Abstract:

A fast-drying ink composition comprising water, a fast-drying solvent mixture including a hydrophilic co-solvent having low enthalpy of evaporation, a surface-active humectant, and a colorant. The hydrophilic co-solvent may be selected from the group consisting of propylene glycol n-propyl ether, tripropylene glycol methyl ether, and dipropylene glycol methyl ether. The surface-active humectant may comprise a hydrophobic end having a repeating unit “n” ranging from 1 to 36 and selected from the group consisting of alkane-based (CH)n, fluoro-based (CF)n, and silicone-based (SiO)n, and a hygroscopic end having a repeating unit “i” ranging from 2 to 8 and selected from the group consisting of a hydroxyl group, an amine group, a carboxyl group and an ester group.

US Patent:

20120216949, Aug 30, 2012

Filed:

Feb 23, 2012

Appl. No.:

13/403665

Inventors:

Barbara Carey Stachowski - Orinda CA, US
Loc Vinh Bui - Moorpark CA, US
Joanne Moody - Livermore CA, US

Assignee:

CAREY & CO. - Orinda CA

International Classification:

B32B 38/10
B65D 63/12
B32B 3/26
C08G 77/00
C08G 18/06
F16B 1/00
F16B 47/00

US Classification:

156247, 24 1, 24 305 P, 24304, 528 10, 528 85, 4283044

Abstract:

A selective adhesive mechanism comprises an engineered surface structure or substrate and a compliant member. The compliant member is able to be a dry and non-tacky substance. The compliant member is selectively adhesive to the engineered surface when the compliant member is in contact with the engineered surface. The compliant member shows adhesion to the engineered surface when the compliant member is within a pre-selected range of hardness. In some embodiments, the compliant member comprises a polymeric member, a thermoplastic elastomer, silicone, polyurethane, or a combination thereof.

US Patent:

20120288680, Nov 15, 2012

Filed:

May 7, 2012

Appl. No.:

13/465706

Inventors:

My T. NGUYEN - Kirkland, CA
Loc Vinh BUI - Moorpark CA, US

International Classification:

B32B 3/30

US Classification:

428156

Abstract:

A dry adhesive comprising a micro-featured and nano-featured surface, and a compliant surface having a hardness of about 60 Shore A or less, the micro-featured and nano-featured surface and the compliant surface being capable of forming upon contact a dry adhesive bond with each other.