Patents by Inventor John Chu

John Chu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7273903
    Abstract: The present invention relates to compositions and preparative process of partially or fully neutralized mixtures of carboxylate functionalized ethylene high copolymers or terpolymers (Mw between 80,000 and 500,000) with carboxylate functionalized ethylene low copolymers (Mw between 2,000 and 30,000) and organic acid salts and injection or compression molded applications such as golf ball components thereof.
    Type: Grant
    Filed: April 6, 2005
    Date of Patent: September 25, 2007
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: John Chu Chen
  • Patent number: 7238737
    Abstract: Disclosed are thermoplastic compositions comprising partially or fully neutralized carboxylic acid-based ionomers modified with rosin or rosin derivatives and, optionally, organic acids and salts thereof. Methods of preparing the thermoplastic compositions are also provided. The thermoplastic compositions exhibit higher hardness and stiffness than typical ionomer compositions. Also disclosed are golf balls, sporting equipment, and other non-sport articles comprising said thermoplastic compositions and methods for their preparation.
    Type: Grant
    Filed: June 2, 2004
    Date of Patent: July 3, 2007
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: John Chu Chen
  • Patent number: 7144958
    Abstract: Disclosed are molded articles such as covers, mantles and cores for golf balls, one-piece thermoplastic golf balls, and heel counters and toe puffs for footwear, prepared from compositions comprising thermoplastic elastomers, thermoplastic carboxylic acid-based ionomers, thermoplastic polyurethanes and thermoset polyurethanes modified with micropulp produced from organic fibers. The compositions are tougher, stronger, and more scuff and abrasion resistant than typical ionomer compositions. Also disclosed are methods for making golf balls comprising said compositions.
    Type: Grant
    Filed: May 14, 2004
    Date of Patent: December 5, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: John Chu Chen
  • Patent number: 7045566
    Abstract: Moisture and gas permeable ionomeric films are described. The films described herein are obtained from blends of ionomers with an organic acid salt in the amount of at least about 5 wt %, and have MVTR greater than films obtained from conventional ionomers. Particularly preferred are the potassium salts of stearic, oleic, isostearic, and isooleic acids. Films comprising a liquid-absorbent ionomer film layer and an impermeable layer are provided. The films are suitable for preparation of tubular casings and shrinkbags, in particular, casings for smoked foodstuffs.
    Type: Grant
    Filed: November 11, 2003
    Date of Patent: May 16, 2006
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: John Chu Chen, I-Hwa Lee, Sam L. Samuels
  • Patent number: 7015274
    Abstract: This invention relates to a polymer precursor dispersion for use in making a polymer that is a solid at room temperature and further relates to a method of making same where the dispersion comprises a polymer precursor comprising an addition monomer, a condensation monomer, a prepolymer, or a polymer modifier and 0.01 to 50 weight percent of a micropulp having a volume average length of from 0.01 to 100 micrometers.
    Type: Grant
    Filed: May 2, 2003
    Date of Patent: March 21, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: John Chu Chen, Arnold Frances, Sam Louis Samuels
  • Publication number: 20050252260
    Abstract: An electronic lock incorporating one or more shape memory metal wire segment as its electromechanical transducer. An electronic control circuit injects electrical current into the shape memory metal wire, causing it to heat up and contract. A gate is positioned by the action of the shape memory metal wire(s) to either allow or block the movement of a locking bolt that affect locking or unlocking. Millions of operational cycles are achieved by limiting the stretching of the shape memory metal wire at low temperature to small percentages of its total length. The design lends itself to miniaturization, with commensurate reduction in power consumption, that is useful to the evolution of future electronic locks.
    Type: Application
    Filed: May 11, 2005
    Publication date: November 17, 2005
    Inventor: John Chu
  • Patent number: 6953820
    Abstract: Thermoplastics with high resilience (high coefficient of restitution) and softness (low Atti compressions) and their use in golf ball components. Melt-processible, highly-neutralized ethylene acid copolymers and process for making them by incorporating an aliphatic, mono-functional organic acid in the acid copolymer and then neutralizing greater than 90% of all the acid groups present.
    Type: Grant
    Filed: October 11, 2002
    Date of Patent: October 11, 2005
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Robert Joseph Statz, John Chu Chen
  • Patent number: 6841470
    Abstract: A method and an apparatus of removing a particle from a metal plug on a substrate is disclosed. The method comprises introducing a slurry onto the metal layer and polishing the metal layer. A solution comprising hydrogen peroxide is introduced onto the metal plug and at least one particle is removed from the metal plug.
    Type: Grant
    Filed: December 31, 1999
    Date of Patent: January 11, 2005
    Assignee: Intel Corporation
    Inventors: Li-Shun Wang, John Chu
  • Publication number: 20040235586
    Abstract: Disclosed are molded articles such as covers, mantles and cores for golf balls, one-piece thermoplastic golf balls, and heel counters and toe puffs for footwear, prepared from compositions comprising thermoplastic elastomers, thermoplastic carboxylic acid-based ionomers, thermoplastic polyurethanes and thermoset polyurethanes modified with micropulp produced from organic fibers. The compositions are tougher, stronger, and more scuff and abrasion resistant than typical ionomer compositions. Also disclosed are methods for making golf balls comprising said compositions.
    Type: Application
    Filed: May 14, 2004
    Publication date: November 25, 2004
    Inventor: John Chu Chen
  • Publication number: 20040220339
    Abstract: This invention relates to a polymer precursor dispersion for use in making a polymer that is a solid at room temperature and further relates to a method of making same where the dispersion comprises a polymer precursor comprising an addition monomer, a condensation monomer, a prepolymer, or a polymer modifier and 0.01 to 50 weight percent of a micropulp having a volume average length of from 0.01 to 100 micrometers.
    Type: Application
    Filed: May 2, 2003
    Publication date: November 4, 2004
    Inventors: John Chu Chen, Arnold Frances, Sam Louis Samuels
  • Patent number: 6777472
    Abstract: Melt-processable, highly-neutralized ethylene, C3 to C8 &agr;,&bgr; ethylenically unsaturated carboxylic acid copolymers and process for making them. Copolymers are made by incorporating a C4 to less than a C36 aliphatic, mono-functional organic acid and neutralizing greater than 90% to 100% of the acid groups present concurrently with or subsequently to the incorporation of the organic acid.
    Type: Grant
    Filed: April 27, 2000
    Date of Patent: August 17, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Robert Joseph Statz, John Chu Chen
  • Publication number: 20040132552
    Abstract: Disclosed are golf balls having soft, resilient bimodal ionomeric covers with improved softness and scuff resistance and methods for their preparation. The soft, resilient bimodal ionomeric covers comprise at least partially neutralized mixtures of carboxylate functionalized terpolymers (molecular weight between about 80,000 and 500,000) with carboxylate functionalized ethylene low copolymers (molecular weight between about 2,000 and 30,000).
    Type: Application
    Filed: September 24, 2003
    Publication date: July 8, 2004
    Inventor: John Chu Chen
  • Patent number: 6653382
    Abstract: Thermoplastics with high resilience (high coefficient of restitution) and softness (low Atti compressions) and their use in golf ball components. Melt-processible, highly-neutralized ethylene acid copolymers and process for making them by incorporating an aliphatic, mono-functional organic acid in the acid copolymer and then neutralizing greater than 90% of all the acid groups present.
    Type: Grant
    Filed: October 18, 2000
    Date of Patent: November 25, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Robert Joseph Statz, John Chu Chen
  • Publication number: 20030157066
    Abstract: A composition is disclosed comprising virus in a formulation comprising a polyhydroxy hydrocarbon buffered to maintain a pH in a range from about 7 to about 8.5 at a temperature in the range from about 2° C. to 27° C. Methods for concentrating and purifying virus preparations are also disclosed.
    Type: Application
    Filed: April 4, 2003
    Publication date: August 21, 2003
    Inventors: Andreas Frei, Henry K.H. Kwan, Varda E. Sandweiss, Gary J. Vellekamp, Pui-Ho Yuen, Laureano L. Bondoc, Frederick William Porter, John Chu-Tay Tang, Peter Ihnat
  • Publication number: 20030158312
    Abstract: Ethylene/(meth)acrylic acid ionomers which have been modified with relatively low levels of a stearic acid moiety, particularly metal stearates and especially calcium stearate have improved resilience for a given level of hardness or PGA Compression values. The improvement is seen in bulk material when measurements are made on solid neat spheres. When used as cover material, the improvement is more manifest for softer material, and is less, or disappears, for typical mixed metal ionomer hard covers. The stearic-modified ionomers or ionomer blends are especially useful when the ionomer is formulated for use as a golf ball core, center, one-piece ball and as a soft golf ball cover. For covers, softer ionomer compositions will show an improvement.
    Type: Application
    Filed: December 10, 2002
    Publication date: August 21, 2003
    Inventor: John Chu Chen
  • Publication number: 20030130434
    Abstract: Thermoplastics with high resilience (high coefficient of restitution) and softness (low Atti compressions) and their use in golf ball components. Melt-processible, highly-neutralized ethylene acid copolymers and process for making them by incorporating an aliphatic, mono-functional organic acid in the acid copolymer and then neutralizing greater than 90% of all the acid groups present.
    Type: Application
    Filed: October 11, 2002
    Publication date: July 10, 2003
    Inventors: Robert Joseph Statz, John Chu Chen
  • Publication number: 20030114565
    Abstract: Thermoplastic ionomer copolymers having high resilience (high coefficient of restitution) and softness (low Atti compressions) made by at least partially neutralizing ethylene/carboxylic acid/alkyl (meth)acrylate copolymers and their use in golf ball components. These soft, resilient ionomers can be blended, for example, with fatty acid salts.
    Type: Application
    Filed: August 28, 2002
    Publication date: June 19, 2003
    Inventors: John Chu Chen, James Kenneth Weddell
  • Publication number: 20030050373
    Abstract: Thermoplastic ionomer compositions having high resilience (high coefficient of restitution) and softness (low Atti compressions) made by highly neutralizing ethylene/carboxylic acid/alkyl (meth)acrylate copolymers that have a high melt index and their use in golf ball components. These soft, resilient ionomers are also made by further melt neutralization or co-neutralization of the high MI ethylene/carboxylic acid/alkyl (meth)acrylate copolymers with an aliphatic, mono-functional organic acid of the acid copolymer and neutralizing to high level.
    Type: Application
    Filed: March 28, 2002
    Publication date: March 13, 2003
    Inventor: John Chu Chen
  • Patent number: 6380072
    Abstract: A method for manufacturing a semiconductor device having an excellent metallization is provided. The method includes the steps of a).
    Type: Grant
    Filed: November 29, 2000
    Date of Patent: April 30, 2002
    Assignee: Mosel Vitelic Inc.
    Inventors: John Chu, Der-Tsyr Fan, Chon-Shin Jou, Ting S. Wang
  • Publication number: 20020001955
    Abstract: A method and an apparatus of removing a particle from a metal layer over a substrate is disclosed. The method comprises introducing a slurry onto the metal layer and polishing the metal layer. A solution comprising hydrogen peroxide is introduced onto the metal layer and at least one particle is removed from the metal layer.
    Type: Application
    Filed: December 31, 1999
    Publication date: January 3, 2002
    Inventors: LI-SHUN WANG, JOHN CHU