Patents by Inventor Robert S. Ward

Robert S. Ward 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: 7687586
    Abstract: Embodiments of the present invention provide various multipolymers and permselective membranes for use with biosensors and other implantable medical devices and prostheses. Embodiments of the present invention may provide structural strength and integrity, and further may control the influx of glucose, oxygen and/or water. Embodiments of the present invention may, for example, minimize or reduce the influx of glucose by minimizing the percentage of hydrophilic segments, which in turn minimizes the percentage of water uptake and the degree of glucose transport.
    Type: Grant
    Filed: April 14, 2006
    Date of Patent: March 30, 2010
    Assignee: Isense Corporation
    Inventors: Robert S. Ward, Yuan Tian, W. Kenneth Ward, Ellen Anderson, Jody House
  • Patent number: 7671162
    Abstract: Polymers whose surfaces are modified by endgroups that include amphipathic surface-modifying moieties. An amphipathic endgroup of a polymer molecule is an endgroup that contains at least two moieties of significantly differing composition, such that the amphipathic endgroup spontaneously rearranges its positioning in a polymer body to position the moiety on the surface of the body, depending upon the composition of the medium with which the body is in contact, when that re-positioning causes a reduction in interfacial energy. An example of an amphipathic surface-modifying endgroup is one that has both a hydrophobic moiety and a hydrophilic moiety in a single endgroup. For instance, a hydrophilic poly(ethylene oxide) terminated with a hydrophilic hydroxyl group is not surface active in air when the surface-modifying endgroup is bonded to a more hydrophobic base polymer.
    Type: Grant
    Filed: August 26, 2005
    Date of Patent: March 2, 2010
    Assignee: DSM IP Assets B.V.
    Inventors: Robert S. Ward, Keith R. McCrea, Yuan Tian, James P. Parakka
  • Publication number: 20090258048
    Abstract: Polymers having the formula R(LE)x wherein R is a polymeric core having a number average molecular weight of from 5000 to 7,000,000 daltons and having x endgroups, E is an endgroup covalently linked to polymeric core R by linkage L, L is a divalent oligomeric chain, having at least 5 identical repeat units, capable of self-assembly with L chains on adjacent molecules of the polymer, and the moieties (LE)x in the polymer may be the same as or different from one another. Design of monomers, oligomers, or other reactive structures otherwise analogous to known Self Assembled Monolayers but with at least one reactive chemical group capable of binding them to the terminus of a polymer, so that the thiol-free SAM analogue becomes the self-assembling surface modifying endgroup of that polymer. Use of the polymer to fabricate a configured article from the surface-modified polymer or a coating or topical treatment on an article made from another material.
    Type: Application
    Filed: December 7, 2006
    Publication date: October 15, 2009
    Applicant: The Polymer Technology Group, Inc.
    Inventors: Robert S. Ward, Keith R. McCrea, Yuan Tian, James P. Parakka, Shanger Wang
  • Patent number: 7368589
    Abstract: The present invention relates to a process for the purification of silicone containing compounds via supercritical fluid extraction. Specifically, the present invention relates to a process comprising the steps of contacting at least one silicone containing compound with a supercritical fluid having a density of between about 0.2 and about 0.8 g/ml, decreasing said density so that two phases are formed a first phase comprising said at least one silicone containing compound and a second phase comprising at least one impurity and separating said second phase from said first phase.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: May 6, 2008
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Shivkumar Mahadevan, Frank Molock, Robert S. Ward, Yuan Tian, Shanger Wang, James M. Serpilio, Jr.
  • Patent number: 7368056
    Abstract: Water-desalination and/or water purification devices. Alternatively, devices that are implantable in animal bodies, possibly configured as self-inflating spinal disc prostheses. The devices include specified types of water-absorbing solute encapsulated by non-porous, water-permeable polymer membranes having specified properties. Also, methods of using the devices in biomedical applications or water treatment.
    Type: Grant
    Filed: January 12, 2004
    Date of Patent: May 6, 2008
    Assignee: The Polymer Technology Group, Incorporated
    Inventors: Robert S. Ward, Sallie K. Coviello
  • Patent number: 7157528
    Abstract: A biocompatible multipolymer, having a backbone comprising about 10 to 45 wt % of at least one hard segment and about 55 to 90 wt % of soft segments. The soft segments are divided into three groups, 5 to 25 wt %, of total soft segment weight, of an oxygen permeable soft segment; 5 to 25 wt %, of total soft segment weight, of a hydrophilic soft segment; and 50 to 90 wt %, of total soft segment weight, of a biostable, relatively hydrophobic soft segment.
    Type: Grant
    Filed: May 21, 2004
    Date of Patent: January 2, 2007
    Assignee: The Polymer Technology Group
    Inventor: Robert S. Ward
  • Publication number: 20040140264
    Abstract: Water-desalination and/or water purification devices. Alternatively, devices that are implantable in animal bodies, possibly configured as self-inflating spinal disc prostheses. The devices include specified types of water-absorbing solute encapsulated by non-porous, water-permeable polymer membranes having specified properties. Also, methods of using the devices in biomedical applications or water treatment.
    Type: Application
    Filed: January 12, 2004
    Publication date: July 22, 2004
    Applicant: The Polymer Technology Group, Incorporated
    Inventors: Robert S. Ward, Sallie K. Coviello
  • Patent number: 6692528
    Abstract: Devices implantable in animal bodies, possibly configured as self-inflating spinal disc prostheses. Alternatively, non-implantable water-desalination and/or purification devices. The devices include specified types of water-absorbing solute encapsulated by non-porous, water-permeable polymer membranes having specified properties. Also, methods of using the devices in biomedical applications or water treatment.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: February 17, 2004
    Assignee: The Polymer Technology Group Incorporated
    Inventors: Robert S. Ward, Sallie K. Coviello
  • Patent number: 6633800
    Abstract: An apparatus and method for a control unit which allows for autonomous, manual and tele-operation of mining vehicles. The control unit has a robust system design to withstand the harsh environment of underground mines. The control unit allows a tele-operator, in a remote tele-operator station, to use image and operational data, joysticks and foot pedals to remotely control the mining vehicle. In another aspect, the control unit provides safety features such as supervising its operation for operational errors and providing status, warning and error information to the tele-operator station.
    Type: Grant
    Filed: January 31, 2001
    Date of Patent: October 14, 2003
    Assignee: Ainsworth Inc.
    Inventors: Robert S. Ward, James M. Law, Leif A. Bloomquist
  • Publication number: 20020082699
    Abstract: Devices implantable in animal bodies, possibly configured as self-inflating spinal disc prostheses. Alternatively, non-implantable water-desalination and/or purification devices. The devices include specified types of water-absorbing solute encapsulated by non-porous, water-permeable polymer membranes having specified properties. Also, methods of using the devices in biomedical applications or water treatment.
    Type: Application
    Filed: November 8, 2001
    Publication date: June 27, 2002
    Inventors: Robert S. Ward, Sallie K. Coviello
  • Patent number: 6371470
    Abstract: A funneled cutting board assembly comprising a cutting board with feet and integral funnel assembly. The cutting board comprises a cutting surface with side rails and an aperture. Extending through the aperture is a funnel. The cutting board may contain an accessory, such as a knife sharpener. The feet of the cutting board are foldable, so in the open position they raise the board for use above a flat surface, and may be closed for use over a sink or to facilitate storage of the board. The funnel assembly of the funneled cutting board may come with various accessories, such as a strainer and different grater inserts.
    Type: Grant
    Filed: June 13, 2001
    Date of Patent: April 16, 2002
    Inventor: Robert S. Ward
  • Patent number: 5814705
    Abstract: The present invention provides a composition that softens at a predetermined temperature, preferably between about 20.degree. C. and 90.degree. C., and more preferably between about 20.degree. C. and about 62.degree. C., comprising at least one block copolymer having at least two thermal transition temperatures. The composition is characterized by at least two thermal transition temperatures, one of which is a predetermined lower transition temperature, preferably between about 20.degree. C. to 90.degree. C., and more preferably between about 20.degree. C. to about 62.degree. C., and one of which is an upper transition temperature. The present invention also provides a method of making the composition, a method of making biomedical materials and articles, and toys and toy components, with shape-memory properties from the composition, and biomedical materials and articles, and toys and toy components, with shape-memory properties made from the composition.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 29, 1998
    Assignee: Thoratec Laboratories Corporation
    Inventors: Robert S. Ward, Judy S. Riffle
  • Patent number: 5756632
    Abstract: A biocompatible, hydrophilic, segmented block polyurethane copolymer which comprises 5 to 45 wt % of a hard segment and 95 to 55 wt % of a soft segment selected from a hydrophilic, hydrophobic and amphipathic oligomer is disclosed. The copolymer is capable of forming a non-porous, semi-permeable film of a tensile strength greater than 300 and up to 10,000 psi, and has an ultimate elongation greater than 300% and up to 1,500% and a water absorption such that the sum of the volume fraction of absorbed water and the hydrophilic volume fraction of the soft segment exceeds about 100% and is up to about 2,000% of the dry polymer volume. The film is permeable to cell nutrients and waste molecules of up to about 6,000 to 600,000 molecular weight and is substantially impermeable to cells and particulate matter. A non-porous, semi-permeable, biocompatible film is formed from the block copolymer of the invention in the form of a flexible sheet or a hollow fiber.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: May 26, 1998
    Assignee: The Polymer Technology Group
    Inventors: Robert S. Ward, Kathleen A. White
  • Patent number: 5589563
    Abstract: The present invention relates to novel polymeric compositions of matter and their use. Said polymeric compositions of matter are surface active endgroup-containing polymers that comprise a linear base polymer having covalently bonded surface active endgroups of a nature and present in an amount such that said polymers have a surface or interfacial tension that differs by at least 1 dyne/cm from the surface or interfacial tension of an otherwise identical polymer that does not contain said covalently bonded surface active endgroups. The novel linear polymers according to the present invention are particularly suitable for use in the manufacture of medical devices, and especially of medical devices intended to be used in contact with bodily fluids such as blood. Examples of such medical devices include catheters and artificial hearts.
    Type: Grant
    Filed: April 1, 1994
    Date of Patent: December 31, 1996
    Assignee: The Polymer Technology Group
    Inventors: Robert S. Ward, Kathleen A. White
  • Patent number: 5506300
    Abstract: The present invention provides a composition that softens at a predetermined temperature, preferably between about 20.degree. C. and 90.degree. C., and more preferably between about 20.degree. C. and about 62.degree. C., comprising at least one block copolymer having at least two thermal transition temperatures. The composition is characterized by at least two thermal transition temperatures, one of which is a predetermined lower transition temperature, preferably between about 20.degree. C. to 90.degree. C., and more preferably between about 20.degree. C. to about 62.degree. C., and one of which is an upper transition temperature. The present invention also provides a method of making the composition, a method of making biomedical materials and articles, and toys and toy components, with shape-memory properties from the composition, and biomedical materials and articles, and toys and toy components, with shape-memory properties made from the composition.
    Type: Grant
    Filed: February 18, 1993
    Date of Patent: April 9, 1996
    Assignee: Thoratec Laboratories Corporation
    Inventors: Robert S. Ward, Judy S. Riffle
  • Patent number: 5428123
    Abstract: A biocompatible, hydrophilic, segmented block polyurethane copolymer which comprises 5 to 45 wt % of a hard segment and 95 to 55 wt % of a soft segment selected from a hydrophilic, hydrophobic and amphipathic oligomer is disclosed. The copolymer is capable of forming a non-porous, semi-permeable film of a tensile strength greater than 300 and up to 10,000 psi, and has an ultimate elongation greater than 300% and up to 1,500% and a water absorption such that the sum of the volume fraction of absorbed water and the hydrophilic volume fraction of the soft segment exceeds about 100% and is up to about 2,000% of the dry polymer volume. The film is permeable to cell nutrients and waste molecules of up to about 6,000 to 600,000 molecular weight and is substantially impermeable to cells and particulate matter. A non-porous, semi-permeable, biocompatible film is formed from the block copolymer of the invention in the form of a flexible sheet or a hollow fiber.
    Type: Grant
    Filed: April 23, 1993
    Date of Patent: June 27, 1995
    Assignee: The Polymer Technology Group
    Inventors: Robert S. Ward, Kathleen A. White
  • Patent number: 5235003
    Abstract: Novel linear polysiloxane-polyacetone block copolymers are useful as surface modifying additives due in part to their miscibility with a wide variety of base polymers. A particularly preferred polysiloxane-polycaprolactone linear blocked copolymer is miscible with nylon and is useful for forming surface modified nylon products.
    Type: Grant
    Filed: August 31, 1990
    Date of Patent: August 10, 1993
    Assignee: Thoratec Laboratories Corporation
    Inventors: Robert S. Ward, Judy S. Riffle
  • Patent number: 5120813
    Abstract: Polymeric materials are provided characterized by hard segments and copolymer soft blocks comprising hydrophobic and hydrophilic components. The polymeric materials may be mixed with a base polymer and/or inorganic salts. The polymeric materials and mixtures containing same are characterized by improved moisture vapor transmission rates. The polymeric materials may be formed into films for use as wound dressings, burn dressings, surgical drapes, semipermeable membranes, and coatings for textiles.
    Type: Grant
    Filed: January 4, 1991
    Date of Patent: June 9, 1992
    Assignee: Th. Goldschmidt AG
    Inventor: Robert S. Ward, Jr.
  • Patent number: 4963595
    Abstract: Novel linear polysiloxane-polylactone block copolymers are useful as surface modifying additives due in part to their miscibility with a wide variety of base polymers. A particularly preferred polysiloxane-polycaprolactone linear blocked copolymer is miscible with nylon and is useful for forming surface modified nylon products.
    Type: Grant
    Filed: December 22, 1988
    Date of Patent: October 16, 1990
    Assignee: Thoratec Laboratories Corporation
    Inventors: Robert S. Ward, Judy S. Riffle
  • Patent number: 4861830
    Abstract: A polymer admixture is formed from a base polymer and thermoplastic copolymer additive including polar hard segments and polar and nonpolar soft blocks in graft or block copolymer form. The polymer admixture is characterized by increased contact angle hysteresis and is formed into blood and tissue-contacting surfaces of a biomedical device or into textiles. A preferred additive comprises a segmented block copolymer having polydialkylsiloxanes as nonpolar soft blocks, and a polyurethane as hard segments and a polyalkylene oxide as a polar soft block.
    Type: Grant
    Filed: June 22, 1987
    Date of Patent: August 29, 1989
    Assignee: Th. Goldschmidt AG
    Inventor: Robert S. Ward, Jr.