Patents by Inventor Pin-pin Wu

Pin-pin Wu 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).

  • METHOD FOR MANUFACTURING BIOABSORBABLE STENTS
    Publication number: 20120280432
    Abstract: A method for manufacturing a bioabsorbable stent and an apparatus for doing the same are disclosed. The method includes providing a polymer resin, melting the polymer resin to form a molten hollow parison, cooling the molten hollow parison to form a hot hollow parison, elongating the hot hollow parison, expanding the hot hollow parison by feeding a compressed gas into the hot hollow parison to form a stent preform, and patterning the stent preform to form a bioabsorbable stent.
    Type: Application
    Filed: May 7, 2012
    Publication date: November 8, 2012
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Jyh-Chern Chen, Kuo-Yao Weng, Shian-Yih Wang, Pin-Pin Wu, Mei Lan Chen
  • Process for branching thermoplastic linear polycarbonate resins
    Patent number: 6160082
    Abstract: Linear polyesters are branched by transesterification with resins having the formula: ##STR1## wherein n is an integer of from 1 to 10.
    Type: Grant
    Filed: November 5, 1997
    Date of Patent: December 12, 2000
    Assignee: General Electric Company
    Inventors: Ye-Gang Lin, Roy R. Odle, William J. Swatos, Pin-pin Wu
  • Method of branching and cross-linking a polycarbonate resin
    Patent number: 6087468
    Abstract: The disclosure describes reacting a multi-functional phenolic or carboxylic branching agent with a transesterification catalyst to form an organic salt prior to reactive extrusion of said organic salt branching agent with linear polycarbonate resin as a means to dramatically increase the efficiency of the branching agent in the preparation of branched polycarbonate.
    Type: Grant
    Filed: October 20, 1997
    Date of Patent: July 11, 2000
    Assignee: General Electric Company
    Inventors: Theodorus L. Hoeks, Adrianus A. M. Kusters, Ye-Gang Lin, Patrick J. McCloskey, Raphael Mestanza, Pin-pin Wu
  • Polyphenols as polycarbonate branching agents
    Patent number: 5948876
    Abstract: Branched polycarbonates are prepared by the reaction of a linear or branched polycarbonate with a branching resin having a molecular weight up to about 3,000, typically a novolak or a bisphenol polymer. The reaction preferably takes place in the presence of a carbonate equilibration catalyst such as a quaternary bisphenolate.
    Type: Grant
    Filed: December 11, 1997
    Date of Patent: September 7, 1999
    Assignee: General Electric Company
    Inventors: Raphael Mestanza, Patrick Joseph McCloskey, Theodorus Lambertus Hoeks, Adrianus Alphonsus Kusters, Pin-Pin Wu, Ye-Gang Lin
  • Tetraphenols and their use as polycarbonate branching agents
    Patent number: 5863992
    Abstract: Branched polycarbonates having properties suitable for blow molding are prepared by equilibrating a linear or branched aromatic polycarbonate with certain tetraphenols, especially 2,2,5,5-tetrakis (4-hydroxyphenyl)hexane and ?1,1-bis(p-hydroxyphenyl)ethyl!-phenyl ether.
    Type: Grant
    Filed: December 17, 1996
    Date of Patent: January 26, 1999
    Assignee: General Electric Company
    Inventors: Patrick Joseph McCloskey, David Michel Dardaris, YeGang Lin, Pin-Pin Wu, Jimmy Lynn Webb
  • Ortho esters as BPA scavenger in polycarbonate product
    Patent number: 5807912
    Abstract: Polycarbonate resins are freed of unreacted residues of the dihydric phenol reactants employed in their preparation by heating the resins in the presence of ortho esters or ortho carbonates.
    Type: Grant
    Filed: January 31, 1997
    Date of Patent: September 15, 1998
    Assignee: General Electric Company
    Inventors: Pin-pin Wu, Farid F. Khouri
  • Method for improving catalyst efficiency during polycarbonate redistribution
    Patent number: 5521275
    Abstract: The efficiency of a redistribution catalyst during polycarbonate redistribution is improved by employing an extruder screw design that provides a melt seal between the extruder throat and the vacuum port. A melt seal exists when the free volume within the extruder is sufficiently filled with molten resin so as to prevent the passage of gases between sections of the extruder.
    Type: Grant
    Filed: September 5, 1995
    Date of Patent: May 28, 1996
    Assignee: General Electric Company
    Inventors: Patrick J. McCloskey, David M. Dardaris, Eric T. Gohr, Pin-pin Wu