Now showing items 21-40 of 619

    • Process and apparatus for separating fine particles by microbubble flotation together with a process and apparatus for generation of microbubbles 

      Virginia Tech Intellectual Properties, Inc.; Yoon, Roe-Hoan; Adel, Gregory T.; Luttrell, Gerald H. (United States Patent and Trademark Office, 1991-01-01)
      A method and apparatus are disclosed for the microbubble flotation separation of very fine particles, especially coal, so as to produce a high purity and large recovery efficiently. This is accomplished through the use of ...
    • Polyalkylvinyl ether/polyalkyloxazoline copolymers, processes for making, and uses 

      Virginia Tech Intellectual Properties, Inc.; Riffle, Judy; Sinai-Zingde, Gurudus D. (United States Patent and Trademark Office, 1991-01-29)
      Graft and block copolymers of polyalkylvinyl ether and polyoxazoline moieties can be used as polymeric compatibilizers.
    • Supported aqueous phase organometallic catalyst useful for hydroformylation and other reactions, and a method for its preparation 

      Virginia Tech Intellectual Properties, Inc.; Davis, Mark E.; Arhancet, Juan; Hanson, Brian E. (United States Patent and Trademark Office, 1991-02-19)
      This invention relates to a catalyst comprising a solid surface having immobilized thereon an aqueous solution of one or more organic complexes of rhodium. The catalyst is useful for promoting hydroformylation, hydrogenation ...
    • Formation of acyclic bis (reissert compounds) 

      Virginia Tech Intellectual Properties, Inc.; Gibson, Harry W.; Jois, Yajnanarayana H. (United States Patent and Trademark Office, 1991-02-26)
      Bis Reissert compounds can be formed by reaction of a cyanohydrin, formed by reaction of an aldehyde and a diamine, with benzoyl chloride in the presence of an amine acid acceptor.
    • Poly(alkyl vinyl ether)polyolefin copolymers 

      Virginia Tech Intellectual Properties, Inc.; McGrath, James E.; Riffle, Judy; Patel, Niranjan (United States Patent and Trademark Office, 1991-03-05)
      A blend of a polyolefin and a poly(alkyl vinyl ether) can be blended at elevated temperature to form a copolymer of the polyolefin and poly(alkyl vinyl ether). The resulting composition is useful as a compatibilizer, as a ...
    • Formation of reissert compound of benzoyl benzimidazole 

      Virginia Tech Intellectual Properties, Inc.; Gibson, Harry W.; Jois, Yajnanarayana H. (United States Patent and Trademark Office, 1991-03-19)
      The Reissert compound of 1-benzoylbenzimidazole can be formed by reaction of an acid chloride (e.g., benzoyl chloride) and cyanide (e.g., trimethylsilyl cyanide) with benzoyl benzimidazole. It has the formula: ##STR1## and ...
    • Formation of Reissert compound of bisbenzimidazole 

      Virginia Tech Intellectual Properties, Inc.; Gibson, Harry W.; Jois, Yajnanarayana H. (United States Patent and Trademark Office, 1991-06-04)
      A Reissert compound of bisbenzimidazole can be formed by first reacting benzimidazole with an aliphatic diacid chloride to form bisbenzimidazole and then reacting the bisbenzimidazole with an aliphatic acid chloride and ...
    • Ophthalmic contact lens with internal fixation light for examination of the optic nerve 

      Center for Innovative Technology; Virginia Commonwealth University; Virginia Polytechnic Institute and State University; Murphy, Kent A.; Richards, David W. (United States Patent and Trademark Office, 1991-06-18)
      An instrument and method for examining the optic nerve head (34) of a patient's eye (14) is disclosed. The instrument is comprised of a gonioscopic lens (10) a lens system (26) where the lens system (26) directs a collimated ...
    • Bis(functionally-substituted phenylene) semi-rigid crowns and process for making 

      Virginia Tech Intellectual Properties, Inc.; Gibson, Harry W.; Delaviz, Yadollah (United States Patent and Trademark Office, 1991-07-02)
      Bis(carboalkoxy-substituted phenylene)-32-crown-10 compounds, useful as polymerizable monomers, can be formed by first reacting a functionalized dihydroxy aromatic compound with a hydroxy protecting group-substituted ...
    • Preparation of acyclic bis (reissert compounds) 

      Virginia Tech Intellectual Properties, Inc.; Gibson, Harry W.; Jois, Yajnanarayana H. (United States Patent and Trademark Office, 1991-08-20)
      A bis Reissert can be formed by the initial reaction of an aromatic dialdehyde (e.g., terephthaldicaboxaldehyde) and primary amine (e.g., methylamine) to form a reaction product which is then reacted with an acid chloride ...
    • Water soluble derivatives of taxol 

      Virginia Tech Intellectual Properties, Inc.; Kingston, David G.; Zhao, Zhi-Yang (United States Patent and Trademark Office, 1991-10-22)
      Sulfonated 2'-acryloyltaxol and sulfonated 2'-O-acyl acid taxol derivatives are synthesized which have improved water solubility and stability while maintaining bio-activity. In particular, 2'-[(3-sulfo-1-oxopropyl)oxy]taxol ...
    • Method of producing star-like polymers from lignin 

      Center for Innovative Technology; Virginia Polytechnic Institute and State University; Glasser, Wolfgang G.; de Oliveira, Willer; Kelley, Stephen S.; Nieh, Li S. (United States Patent and Trademark Office, 1991-11-19)
      A method of producing prepolymeric materials from lignin is disclosed. The method uses lignin which has been hydroxyalkyl modified, such that the lignin is substantially non-phenolic and solvent soluble and/or liquid. The ...
    • Formation of poly(benzimidazole) 

      Virginia Tech Intellectual Properties, Inc.; Gibson, Harry W.; Jois, Yajnanarayana H. (United States Patent and Trademark Office, 1991-11-19)
      A poly Ressert can be formed by first reacting benzimidazole with an aliphatic diacid chloride to form bisbenzimidazole and then reacting the bisbenzimidazole with an aliphatic diacid chloride and cyanide to form the poly ...
    • Novel mine-terminated poly(arylene ether phosphine oxide) oligomer 

      Virginia Tech Intellectual Properties, Inc.; McGrath, James E.; Smith, Carrington Duane (United States Patent and Trademark Office, 1992-01-07)
      Amine-terminated poly(arylene ether phosphine oxide) oligomers of the general formula ##STR1## where Ar' is phenyl, biphenyl, bisphenol-A, etc., can be formed by reaction of a bisphenol monomer, a dihalo triphenyl phosphine ...
    • Preparation of open chain poly(Reissert compounds) 

      Virginia Tech Intellectual Properties, Inc.; Gibson, Harry W.; Yajnanarayana, H. Jois (United States Patent and Trademark Office, 1992-01-14)
      An open chain poly Reissert can be formed by the initial reaction of an aromatic dialdehyde (e.g., terephthaldicaboxaldehyde) and ammonia or a primary amine (e.g., methylamine) to form a reaction product which is then ...
    • Novel phosphorus containing epoxy networks based on trihydrocarbyl phosphine oxides having active substituents 

      Virginia Tech Intellectual Properties, Inc.; McGrath, James E.; Gungor, Attila (United States Patent and Trademark Office, 1992-02-04)
      Epoxy resins can be cured or crosslinked with trihydrocarbyl phosphine oxide compounds having epoxy-reactive (active hydrogen) substituents either alone or in combination with amine-terminated polyarylene ethers (e.g., ...
    • High temperature ceramic particulate filter 

      Center for Innovative Technology; Virginia Polytechnic Institute; State University Virginia Tech Intellectual Properties, Inc.; Gonzalez, Sandra; Brown, Nancy R.; Brown, Jr., Jesse J. (United States Patent and Trademark Office, 1992-02-11)
      A high temperature ceramic filter is produced from a composition containing efractory cement, aggregate, pore forming additives, and sintering agents. The pore forming additives are synthetic or organic powders or fibers ...
    • Polyalkylvinyl ether/polyalkyloxazoline copolymers, processes for making, and uses 

      Virginia Tech Intellectual Properties, Inc.; Riffle, Judy; Sinai-Zingde, Gurudus D. (United States Patent and Trademark Office, 1992-03-24)
      Graft and block copolymers of polyalkylvinyl ether and polyoxazoline moieties can be used as polymeric compatibilizers.
    • Detection, isolation and purification of Clostridium difficile toxin A with toxin receptors 

      Virginia Tech Intellectual Properties, Inc.; Wilkins, Tracy D.; Tucker, Kenneth D. (United States Patent and Trademark Office, 1992-03-24)
      A method is provided for detecting the presence of C. difficile toxin A. Stool or other appropriate specimen is contacted with a reagent containing the human X, Y or I-antigens, each of which is a specific receptor for ...
    • Bis(maleimido) phenoxy phenylphosphine oxide 

      Virginia Tech Intellectual Properties, Inc.; McGrath, James E.; Wood, III, Paul A. (United States Patent and Trademark Office, 1992-03-31)
      Bis(maleimido) phenoxy phenylphosphine oxide monomers are formed by reacting a bis(aminophenoxyphenyl) phosphine oxide, e.g., bis(3-aminophenoxy) triphenylphosphine oxide, with maleic anhydride forming the intermediate ...