John R Fong

US Patent:

7307123, Dec 11, 2007

Filed:

Apr 18, 2003

Appl. No.:

10/511924

Inventors:

David Johnson - Los Angeles CA, US
John Wai Fong - Los Angeles CA, US

Assignee:

Huntsman Advanced Materials Americas Inc. - The Woodlands TX

International Classification:

C08L 63/00
C08F 2/46

US Classification:

525 65, 428515, 4302701, 522 1, 524731, 556462

Abstract:

A photocurable composition, including (a) a photocurable monomer, e. g. a cationically curable monomer and/or a radically curable monomer; (b) reactive particles comprising a crosslinked elastomeric core, e. g. made of polysiloxane material, and a shell of reactive groups on an outer surface of the core, wherein the reactive groups comprise epoxy groups, ethylenically unsaturated groups, or hydroxy groups; and (c) an appropriate photoinitiator, e. g. a radical photoinitiator; and a cationic photoinitiator. A method of making a 3-D object from such a composition and a 3-D object made by the method are also provided. The cured composition generally has a smooth surface. The use of the reactive particles makes the composition more stable and the particles do not readily separate out.

US Patent:

7964248, Jun 21, 2011

Filed:

Apr 9, 2008

Appl. No.:

12/595643

Inventors:

John Wai Fong - Temple City CA, US
Carole Chapelat - Saint Louis, FR
Loic Messe - Riedisheim, FR
Ranjana Patel - Little Hallingbury, GB
Laurence Messe - Riedisheim, FR

Assignee:

Huntsman Advanced Materials Americas LLC - The Woodlands TX

International Classification:

G03F 7/038
G03F 7/00
G03C 5/00
B05D 1/00

US Classification:

427466, 427510, 430269, 522 15, 522 25, 522 31

Abstract:

The present invention is directed to a photoinitiator composition comprising two different cationic photoinitiators and a photocurable composition comprising said photoinitiator composition. Moreover, the present invention relates to the use of the photoinitiator composition and the photocurable composition. Furthermore, the present invention relates to a process for producing a three dimensional article.

US Patent:

8182882, May 22, 2012

Filed:

Oct 31, 2007

Appl. No.:

11/931131

Inventors:

David Johnson - Los Angeles CA, US
John Wai Fong - Los Angeles CA, US

Assignee:

3D Systems, Inc. - Rock Hill SC

International Classification:

C08F 2/46

US Classification:

427508, 427487, 427517

Abstract:

A method of making a 3-D object from a photocurable composition, including (a) a cationically curable monomer; (b) a radically curable monomer; (c) reactive particles comprising a crosslinked polysiloxane core and a shell of reactive groups on an outer surface of the core, wherein the reactive groups comprise epoxy groups, ethylenically unsaturated groups, or hydroxy groups; (d) a radical photoinitiator; and (e) a cationic photoinitiator; the method comprising (1) forming a first layer of the photocurable composition; (2) exposing the first layer to actinic radiation sufficient to harden the first layer; (3) forming a second layer of the photocurable composition above the hardened first layer; (4) exposing the second layer to actinic radiation sufficient to harden the second layer; and (5) repeating steps (3)-(4) as needed to form a 3-D object.

US Patent:

8334025, Dec 18, 2012

Filed:

Oct 26, 2006

Appl. No.:

12/092490

Inventors:

John Wai Fong - Temple City CA, US
Richard N. Leyden - Topanga CA, US
Laurence Messe - Blotzheim, FR
Ranjana C. Patel - Little Hallingbury, GB
Carole Chapelat - Saint-Louis, FR

Assignee:

3D Systems, Inc. - Rock Hill SC

International Classification:

G03F 7/00
G03F 7/038
B22C 7/02
B29C 67/00
A61L 27/14
A61L 29/04
C09D 11/10
G09B 23/28

US Classification:

427466, 430269, 522 15, 522 25, 522 26, 522 29, 522107

Abstract:

The present invention provides a low viscosity photocurable composition including (i) a cationically curable component (ii) a free radically active component (iii) an antimony-free cationic photoinitiator (v) a free radical photoinitiator, and (vi) a toughening agent. The photocurable composition can be cured using rapid prototyping techniques to form three-dimensional articles which can be used in various aerospace and investment casting applications.

US Patent:

8347780, Jan 8, 2013

Filed:

Nov 17, 2008

Appl. No.:

12/272385

Inventors:

John Fong - Irvine CA, US
Peter Wright - Harlow, GB
Chris H. McDonald - Yorba Linda CA, US
Gerard K. Caldwell - Corona CA, US
David L. Phillips - Santa Ana CA, US
David Allen - Santa Ana CA, US
Thang Dang - Huntington Beach CA, US
Daniel Gudalj - Orange CA, US

Assignee:

Xylem IP Holdings LLC - White Plains NY

International Classification:

F16T 1/34

US Classification:

993231, 137177, 137192

Abstract:

The present invention provides a method and apparatus for separating air from a fluid, such as syrup, as the fluid enters a first chamber of a system; passing the fluid from the first chamber to a second chamber via a first device; passing the air from the first chamber to the second chamber via a second device so as to reintroduce the air back into the fluid and form a new fluid mixture having more uniform air bubbles; and discharging the new fluid out of the system.

US Patent:

8377623, Feb 19, 2013

Filed:

Nov 21, 2008

Appl. No.:

12/745036

Inventors:

John Wai Fong - Temple City CA, US

Assignee:

3D Systems, Inc. - Rock Hill SC

International Classification:

G03C 1/00
G03C 5/00
G03F 7/00
C08G 59/68

US Classification:

430269, 4302801, 522 15, 522 25, 522 31

Abstract:

The present invention provides a low viscosity photocurable composition including (i) a cationically curable component comprising a polyglycidyl epoxy compound (ii) a free radically active component (iii) a cationic photoinitiator (v) a free radical photoinitiator and optionally (iv) one or more optional components. The photocurable composition can be cured using rapid prototyping techniques to form clear, colorless three-dimensional articles having excellent mechanical properties.

US Patent:

20030198824, Oct 23, 2003

Filed:

Apr 19, 2002

Appl. No.:

10/125508

Inventors:

John Fong - Temple City CA, US
David Johnson - Saugus CA, US

International Classification:

C07F007/04

US Classification:

428/515000, 524/731000, 556/462000

Abstract:

A photocurable composition, including (a) a cationically curable monomer; (b) a radically curable monomer; (c) reactive particles comprising a crosslinked polysiloxane core and a shell of reactive groups on an outer surface of the core, wherein the reactive groups comprise epoxy groups, ethylenically unsaturated groups, or hydroxy groups; (d) a radical photoinitiator; and (e) a cationic photoinitiator. A method of making a 3-D object from such a composition. A 3-D object made by the method.

US Patent:

20090274566, Nov 5, 2009

Filed:

Apr 30, 2008

Appl. No.:

12/112448

Inventors:

John J. FONG - Irvine CA, US

Assignee:

ITT MANUFACTURING ENTERPRISES, INC. - Wilmington DE

International Classification:

F04B 49/00
F16K 15/00

US Classification:

417307, 137511

Abstract:

A check valve is provided having a seat and a poppet. The seat is made of a plastic material, has an aperture for enabling fluid to flow through the seat, and also has one end portion that has a circumferential edge with a thin sealing lip. The poppet is slidably arranged in the aperture of the seat and has an elastic member. The poppet is configured for opening to enable fluid to flow in one direction when fluid pressure is detected. The elastic member is configured for ensuring sealing between an outer surface of the poppet and the thin sealing lip of the seat when there is no fluid flow in the one direction so as to substantially prevent fluid flow in the opposite direction. According to some embodiments of the present invention, the thin plastic sealing lip may have a thickness of about 0.01″ Embodiments are also envisioned where the thickness may be in a range of 0.003″-0.03″.