Patents by Inventor Reginald T. Tang

Reginald T. Tang 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).

  • High molecular weight bioresorbable polymers and implantable devices thereof
    Patent number: 5358475
    Abstract: Nerve channels made from high molecular weight lactic acid polymers, preferably polymers having a molecular weight between about 234,000 and 320,000, provide an unexpectedly beneficial effect on cell growth and regeneration of function.
    Type: Grant
    Filed: September 28, 1992
    Date of Patent: October 25, 1994
    Assignee: United States Surgical Corporation
    Inventors: Frank Mares, Reginald T. Tang, Tin-Ho Chiu, Theodore Largman
  • Medical devices fabricated from homopolymers and copolymers having recurring carbonate units
    Patent number: 5274074
    Abstract: This invention relates to medical devices formed totally or in part from homopolymers or copolymers comprising recurring carbonate moieties.
    Type: Grant
    Filed: July 22, 1992
    Date of Patent: December 28, 1993
    Assignee: United States Surgical Corporation
    Inventors: Reginald T. Tang, Frank Mares, William J. Boyle, Jr., Tin-Ho Chiu, Kundanbhai M. Patel
  • Medical devices fabricated from homopolymers and copolymers having recurring carbonate units
    Patent number: 5256764
    Abstract: This invention relates to medical devices formed totally or in part from homopolymers or copolymers comprising recurring carbonate moieties.
    Type: Grant
    Filed: July 22, 1992
    Date of Patent: October 26, 1993
    Assignee: United States Surgical Corporation
    Inventors: Reginald T. Tang, Frank Mares, William J. Boyle, Jr., Tin-Ho Chiu, Kundanbhai M. Patel
  • Medical devices fabricated totally or in part from copolymers of recurring units derived from cyclic carbonates and lactides
    Patent number: 5185408
    Abstract: This invention relates to novel copolymers containing carbonate repeat units and ester repeat units.
    Type: Grant
    Filed: November 18, 1991
    Date of Patent: February 9, 1993
    Assignee: Allied-Signal Inc.
    Inventors: Reginald T. Tang, Frank Mares, William J. Boyle, Jr., Tin-Ho Chiu, Kundan M. Patel
  • Medical devices fabricated from homopolymers and copolymers having recurring carbonate units
    Patent number: 5152781
    Abstract: This invention relates to medical devices formed totally or in part from homopolymers or copolymers comprising recurring carbonate moieties.
    Type: Grant
    Filed: February 10, 1992
    Date of Patent: October 6, 1992
    Assignee: Allied-Signal Inc.
    Inventors: Reginald T. Tang, Frank Mares, William J. Boyle, Jr., Tin-Ho Chiu, Kundanbhai M. Patel
  • Polycarbonate-based block copolymers and devices
    Patent number: 5120802
    Abstract: This invention relates to a novel polycarbonate-based block polymer, and to fibers and bioresorbable implantable medical devices fabricated from said fibers.
    Type: Grant
    Filed: December 17, 1987
    Date of Patent: June 9, 1992
    Assignee: Allied-Signal Inc.
    Inventors: Frank Mares, William J. Boyle, Jr., Reginald T. Tang, Kundanbhai M. Patel, Abraham M. Kotliar, Tin-Ho Chiu
  • Medical devices fabricated totally or in part from copolymers of recurring units derived from cyclic carbonates and lactides
    Patent number: 5066772
    Abstract: This invention relates to novel copolymers containing carbonate repeat units and ester repeat units.
    Type: Grant
    Filed: January 18, 1990
    Date of Patent: November 19, 1991
    Assignee: Allied-Signal Inc.
    Inventors: Reginald T. Tang, Frank Mares, William J. Boyle, Jr., Tin-Ho Chiu, Kundan M. Patel
  • Bioresorbable polymers and implantation devices thereof
    Patent number: 5061281
    Abstract: This invention relates to an implantable medical device capable of encouraging cellular growth and regeneration of function fabricated totally or in part from one or more bioresorbable polymers, as for example bioresorbable homopolymers derived from the polymerization of alpha-hydroxy carboxylic acids, where at least one of the polymers has an average molecular weight of from about 234,000 to about 320,000 as measured by gel permeation chromatography.
    Type: Grant
    Filed: December 17, 1986
    Date of Patent: October 29, 1991
    Assignee: Allied-Signal Inc.
    Inventors: Frank Mares, Reginald T. Tang, Tin-Ho Chiu, Theodore Largman, Emery Nyilas, deceased
  • Medical devices fabricated from homopolymers and copolymers having recurring carbonate units
    Patent number: 4920203
    Abstract: This invention relates to medical devices formed totally or in part from homopolymers or copolymers comprising recurring carbonate moieties.
    Type: Grant
    Filed: August 2, 1988
    Date of Patent: April 24, 1990
    Assignee: Allied-Signal Inc.
    Inventors: Reginald T. Tang, Frank Mares, William J. Boyle, Jr., Tin-Ho Chiu, Kundabhai M. Patel
  • Polycarbonate homopolymer-based fiber compositions and method of melt-spinning same and device
    Patent number: 4916207
    Abstract: Novel polycarbonate homopolymers and implantable bioresorbable medical devices fabricated therefrom.
    Type: Grant
    Filed: August 15, 1988
    Date of Patent: April 10, 1990
    Assignee: Allied-Signal, Inc.
    Inventors: William J. Boyle, Jr., Frank Mares, Kundan M. Patel, Reginald T. Tang
  • Medical devices fabricated totally or in part from copolymers of recurring units derived from cyclic carbonates and lactides
    Patent number: 4916193
    Abstract: This invention relates to novel copolymers containing carbonate repeat units and ester repeat units.
    Type: Grant
    Filed: August 1, 1988
    Date of Patent: April 10, 1990
    Assignee: Allied-Signal Inc.
    Inventors: Reginald T. Tang, Frank Mares, William J. Boyle, Jr., Tin-Ho Chiu, Kundanbhai M. Patel
  • Polycarbonate random copolymer-based fiber compositions and method of melt-spinning same and device
    Patent number: 4891263
    Abstract: This invention is directed to novel random copolymers and implantable devices fabricated therefrom.
    Type: Grant
    Filed: December 17, 1987
    Date of Patent: January 2, 1990
    Assignee: Allied-Signal Inc.
    Inventors: Abraham M. Kotliar, William J. Boyle, Jr., Reginald T. Tang, Frank Mares, Kundanbhai M. Patel, Tin-Ho Chiu
  • Process for hydrogen peroxide production from hydrogen and oxygen
    Patent number: 4336241
    Abstract: Hydrogen peroxide production by oxidation of a 2-alkyl-9,10-dihydroxyanthracene, especially the 2-(t-butyl) compound, and catalytic hydrogenation of the resulting 2-alkylanthraquinone back to the dihydroxy compound, using a water-insoluble (bipyridyl) rhodium complex as hydrogenation catalyst. Especially such process carried continuously in a cell in which an organic phase is separated by a porous membrane from an aqueous phase, and the anthraquinone is hydrogenated on the organic side of the cell and hydrogen peroxide is obtained from the aqueous phase. Preferably the rhodium complex is formed with a bipyridyl ligand attached to polystyrene beads, whereby to assure that rhodium is not carried into the hydrogen peroxide production side of the cell.
    Type: Grant
    Filed: March 18, 1981
    Date of Patent: June 22, 1982
    Assignee: Allied Corporation
    Inventors: Steven E. Diamond, Benjamin S. Tovrog, Frank Mares, Reginald T. Tang
  • Molybdenum and tungsten peroxo complexes useful as oxidation catalysts
    Patent number: 4259527
    Abstract: A catalytic system for oxidation of organic compounds including olefins, cyclic ketones and secondary alcohols. Soluble peroxo or solid supported oxo or peroxo complexes of molybdenum or tungsten are used in the presence of hydrogen peroxide to effect the oxidation. The resulting products include lactones, hydroxy acids, ketoacids, hydroxy esters and ketoesters from cyclic ketones; ketones from secondary alcohols and polyols or derivatives thereof from allylic alcohols.
    Type: Grant
    Filed: May 18, 1979
    Date of Patent: March 31, 1981
    Assignee: Allied Chemical Corporation
    Inventors: Frank Mares, Stephen E. Jacobson, Reginald T. Tang
  • Molybdenum and tungsten peroxo complexes useful as oxidation catalysts
    Patent number: 4171313
    Abstract: A catalytic system for oxidation of organic compounds including olefins, cyclic ketones and secondary alcohols. Soluble peroxo or solid supported oxo or peroxo complexes of molybdenum or tungsten are used in the presence of hydrogen peroxide to effect the oxidation. The resulting products include lactones, hydroxy acids, ketoacids, hydroxy esters and ketoesters from cyclic ketones; ketones from secondary alcohols and polyols or derivatives thereof from allylic alcohols.
    Type: Grant
    Filed: October 14, 1977
    Date of Patent: October 16, 1979
    Assignee: Allied Chemical Corporation
    Inventors: Frank Mares, Stephen E. Jacobson, Reginald T. Tang