Patents by Inventor Thomas J. Barton

Thomas J. Barton 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: 6214472
    Abstract: A method of joining similar or dissimilar ceramic and ceramic composite materials, such as SiC continuous fiber ceramic composites, at relatively low joining temperatures uses a solventless, three component bonding agent effective to promote mechanical bond toughness and elevated temperature strength to operating temperatures of approximately 1200 degrees C. The bonding agent comprises a preceramic precursor, an aluminum bearing powder, such as aluminum alloy powder, and mixtures of aluminum metal or alloy powders with another powder, and and boron powder in selected proportions. The bonding agent is disposed as an interlayer between similar or dissimilar ceramic or cermaic composite materials to be joined and is heated in ambient air or inert atmosphere to a temperature not exceeding about 1200 degrees C. to form a strong and tough bond joint between the materials.
    Type: Grant
    Filed: April 14, 1999
    Date of Patent: April 10, 2001
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Thomas J. Barton, Iver E. Anderson, Sina Ijadi-Maghsoodi, Mohammad Nosrati, Ozer Unal
  • Patent number: 5922628
    Abstract: A method of joining similar or dissimilar ceramic and ceramic composite materials, such as SiC continuous fiber ceramic composites, at relatively low joining temperatures uses a solventless, three component bonding agent effective to promote mechanical bond toughness and elevated temperature strength to operating temperatures of approximately 1200 degrees C. The bonding agent comprises a preceramic precursor, an aluminum bearing powder, such as aluminum alloy powder, and mixtures of aluminum metal or alloy powders with another powder, and and boron powder in selected proportions. The bonding agent is disposed as an interlayer between similar or dissimilar ceramic or ceramic composite materials to be joined and is heated in ambient air or inert atmosphere to a temperature not exceeding about 1200 degrees C. to form a strong and tough bond joint between the materials.
    Type: Grant
    Filed: February 23, 1998
    Date of Patent: July 13, 1999
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Thomas J. Barton, Iver E. Anderson, Sina Ijadi-Maghsoodi, Mohammad Nosrati, Ozer Unal
  • Patent number: 5858144
    Abstract: A method of joining similar or dissimilar ceramic and ceramic composite materials, such as SiC continuous fiber ceramic composites, at relatively low joining temperatures uses a solventless, three component bonding agent effective to promote mechanical bond toughness and elevated temperature strength to operating temperatures of approximately 1200 degrees C. The bonding agent comprises a preceramic precursor, an aluminum bearing powder, such as aluminum alloy powder, and mixtures of aluminum metal or alloy powders with another powder, and and boron powder in selected proportions. The bonding agent is disposed as an interlayer between similar or dissimilar ceramic or cermaic composite materials to be joined and is heated in ambient air or inert atmosphere to a temperature not exceeding about 1200 degrees C. to form a strong and tough bond joint between the materials.
    Type: Grant
    Filed: April 12, 1996
    Date of Patent: January 12, 1999
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Thomas J. Barton, Iver E. Anderson, Sina Ijadi-Maghsoodi, Mohammad Nosrati, Ozer Unal
  • Patent number: 5761767
    Abstract: A handle structure providing the user with a comfortable, natural, hook-type grip, maintaining the use's wrist in a neutral or flexed position during the performance of gripping, pulling, or lifting movements of a repetitive exercise routine or an extended work routine, to facilitate grip strength and endurance. The handle comprises a grip portion from which a fixed or adjustable support surface extends tangentially, the user's palm is engaged by the support surface preventing the hand and wrist from extending due to fatigue or slippage.
    Type: Grant
    Filed: March 21, 1996
    Date of Patent: June 9, 1998
    Inventor: Thomas J. Barton
  • Patent number: 5457074
    Abstract: The present invention provides linear organosilicon polymers including acetylene and vinylene moieties, and a process for their preparation. These diorganosilacetylene-alt-diorganosilvinylene linear polymers can be represented by the formula: --[--(R.sup.1)(R.sup.2)Si--C.tbd.C--(R.sup.3)(R.sup.4)Si--CH.dbd.CH--].sub .n --, wherein n.gtoreq.2; and each R.sup.1, R.sup.2, R.sup.3, and R.sup.4 is independently selected from the group consisting of hydrogen, halogen, alkyl, alkenyl, aryl, and aralkyl radicals. The polymers are soluble in organic solvents, air stable, and can be pulled into fibers or cast into films. They can be thermally converted into silicon carbide ceramic materials.
    Type: Grant
    Filed: February 28, 1994
    Date of Patent: October 10, 1995
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Thomas J. Barton, Sina Ijadi-Maghsoodi, Yi Pang
  • Patent number: 5352906
    Abstract: Acetylene containing poly(p-phenyleneacetylene) (PPA) - based light-emitting diodes (LEDs) are provided. The LEDs are fabricated by coating a hole-injecting electrode, preferably an indium tin oxide (ITO) coated glass substrate, with a PPA polymer, such as a 2,5-dibutoxy or a 2,5-dihexoxy derivative of PPA, dissolved in an organic solvent. This is then followed by evaporating a layer of material capable of injecting electrons, such as Al or Al/Ca, onto the polymer to form a base electrode. This composition is then annealed to form efficient EL diodes.
    Type: Grant
    Filed: January 29, 1993
    Date of Patent: October 4, 1994
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Joseph Shinar, Leland S. Swanson, Feng Lu, Yiwei Ding, Thomas J. Barton, Zeev V. Vardeny
  • Patent number: 5328463
    Abstract: A fluid delivery apparatus for administering contrast media or other fluids to a patient. The apparatus includes a reusable main supply system, a disposable fluid administration system, and a transfer syringe. The transfer syringe is used to transfer fluid from the main supply system to the fluid administration system. The administration system includes an air valve and filter to allow for complete drainage of the fluid in the fluid administration system while reducing the likelihood of contaminating the fluid.
    Type: Grant
    Filed: September 18, 1992
    Date of Patent: July 12, 1994
    Assignee: Namic U.S.A. Corporation
    Inventors: Thomas J. Barton, Robbin L. Murdoch
  • Patent number: 5312649
    Abstract: The present invention provides linear organosilicon polymers including acetylene and vinylene moieties, and a process for their preparation. These diorganosilacetylene-alt-diorganosilvinylene linear polymers can be represented by the formula: --[--(R.sup.1)(R.sup.2)Si--C.tbd.C--(R.sup.3)(R.sup.4)Si--CH=CH--].sub.n-- , wherein n.gtoreq.2; and each R.sup.1, R.sup.2, R.sup.3, and R.sup.4 is independently selected from the group consisting of hydrogen, halogen, alkyl, alkenyl, aryl, and aralkyl radicals. The polymers are soluble in organic solvents, air stable, and can be pulled into fibers or cast into films. They can be thermally converted into silicon carbide ceramic materials.
    Type: Grant
    Filed: June 8, 1993
    Date of Patent: May 17, 1994
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Thomas J. Barton, Sina Ijadi-Maghsoodi, Yi Pang
  • Patent number: 5254289
    Abstract: A polymeric material which exhibits nonlinear optical properties if undoped and conductive properties if doped. The polymer is prepared by polymerizing diethynylsilane compositions, the resulting polymeric material having a weight average molecular weight between about 20,000 and about 200,000 grams per mole. The polymer is prepared and catalytically polymerized by exposure to a catalyst, such as MoCl.sub.5 or W(CO).sub.6 /hv.
    Type: Grant
    Filed: May 4, 1992
    Date of Patent: October 19, 1993
    Assignee: Iowa State University
    Inventors: Thomas J. Barton, Sina Ijadi-Maghsoodi, Yi Pang
  • Patent number: 5243060
    Abstract: The present invention provides linear organosilicon polymers including diethynyl-(substituted)arylene units, and a process for their preparation. These novel polymers possess useful properties including electrical conductivity, liquid crystallinity, and/or photoluminescence. These polymers possess good solubility in organic solvents. A preferred example is produced according to the following reaction scheme. ##STR1## These polymers can be solvent-cast to yield excellent films and can also be pulled into fibers from concentrated solutions. All possess substantial crystallinity as revealed by DSC analysis and observation through a polarizing microscope, and possess liquid crystalline properties.
    Type: Grant
    Filed: April 10, 1992
    Date of Patent: September 7, 1993
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Thomas J. Barton, Yiwei Ding
  • Patent number: 5241029
    Abstract: The present invention provides linear organosilicon polymers including acetylene and vinylene moieties, and a process for their preparation. These diorganosilacetylenealt-diorganosilvinylene linear polymers can be represented by the formula: --[--(R.sup.1)(R.sup.2)Si--C.ident.C--(R.sup.3)(R.sup.4)Si--CH=CH--].sub.n --, wherein n.gtoreq.2; each R.sup.1, R.sup.2, R.sup.3, and R.sup.4 is independently selected from the group consisting of hydrogen, halogen, alkyl, alkenyl, aryl, and aralkyl radicals. The polymers are soluble in organic solvents, air stable, and can be pulled into fibers or cast into films. They can be thermally converted into silicon carbide ceramic materials.
    Type: Grant
    Filed: January 7, 1992
    Date of Patent: August 31, 1993
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Thomas J. Barton, Sina Ijadi-Maghsoodi, Yi Pang
  • Patent number: 5162478
    Abstract: Catalytic polymerization of dialkyl-, alkylaryl- or diaryldiethynylhydridosilanes cleanly affords soluble poly(silylene)vinylenes which can be shaped as fibers, films and bulk objects and thermally converted to silicon carbide.
    Type: Grant
    Filed: September 17, 1990
    Date of Patent: November 10, 1992
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Thomas J. Barton, Sina Ijadi-Maghsoodi
  • Patent number: 5115062
    Abstract: A polymeric material which exhibits nonlinear optical properties if undoped and conductive properties if doped. The polymer is prepared by polymerizing diethynylsilane compositions, the resulting polymeric material having a weight average molecular weight between about 20,000 and about 200,000 grams per mole. The polymer is prepared and catalytically polymerized by exposure to a catalyst, such as MoCl.sub.5 or W(CO).sub.6 /hv.
    Type: Grant
    Filed: October 9, 1990
    Date of Patent: May 19, 1992
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Thomas J. Barton, Sina Ijadi-Maghsoodi, Yi Pang
  • Patent number: 4965332
    Abstract: Organosilane polymers having recurring silylene-1,3-butadiyne and/or disilylene-1,3-butadiyne units are prepared in a one-pot synthesis from hexachlorobutadiene. Depending on the organic substituents (R and R'), these polymers have useful film-forming properties, and are converted to the ceramic, silicon carbide upon heating a very uniform high char yields. They can also be pulled into fibers. The polymers are thermally crosslinked above 100.degree. C.
    Type: Grant
    Filed: May 16, 1989
    Date of Patent: October 23, 1990
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Thomas J. Barton, Sina Ijadi-Maghsoodi
  • Patent number: 4940767
    Abstract: Organosilane polymers having recurring silyleneacetylene and/or disilyleneacetylene units are prepared in a one-pot synthesis from trichloroethylene. Depending on the organic substituents (R and R'), these polymers have useful film-forming properties, and are converted to the ceramic, silicon carbide upon heating in very uniform high yields. They can also be pulled into fibers.
    Type: Grant
    Filed: August 1, 1988
    Date of Patent: July 10, 1990
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Thomas J. Barton, Sina Ijadi-Maghsoodi