Patents Assigned to Dendritech Inc.
  • Patent number: 6635720
    Abstract: Core-shell tecto(dendrimers) useful in biomedicine, pharmaceuticals, personal care products, and in other ways analogous to the known uses for dendrimers, hypercomb branched polymers, and other dendritic polymers are the reaction product of a core dendritic polymer molecule having a plurality of terminal functional groups of a first type which are not reactive with each other, and a plurality of shell dendritic polymer molecules having a plurality of terminal functional groups of a second type which are not reactive with each other, but which are reactive with the terminal functional groups of the first type. Each of the shell dendritic polymer molecules is chemically bonded to the core dendritic polymer molecule by a reaction of at least one of the terminal functional groups of the second type with at least one of the terminal functional groups of the first type.
    Type: Grant
    Filed: January 24, 2002
    Date of Patent: October 21, 2003
    Assignee: Dendritech Inc.
    Inventors: Donald A. Tomalia, Srinivas Uppuluri, Douglas R. Swanson, Herbert M. Brothers, II
  • Patent number: 6043336
    Abstract: An electrically conductive polymer is comprised of the reaction product of a dendrimer and an electrophoric compound which exhibits .pi.-stacking upon reduction. The reaction product which is a peripherally modified dendrimer is formed and reduced, either chemically or electrochemically, in a polar solvent. The reduced electrophoric moieties aggregate (form .pi.-stacks) to form electrically conductive pathways. The reduced peripherally modified dendrimers of the invention can be cast into films and other solid forms to provide flexible electrical conductors and semiconductors. The conductive polymers of the invention exhibit electrical conductivities comparable to that of doped polyacetalene, but are oxygen and moisture stable.
    Type: Grant
    Filed: January 26, 1998
    Date of Patent: March 28, 2000
    Assignee: Dendritech, Inc.
    Inventors: Larry L. Miller, Donald A. Tomalia, Robert G. Duan
  • Patent number: 6020457
    Abstract: Dendritic polymers containing disulfide functional groups which are essentially inert under non-reducing conditions, but which form sulfhydryl groups upon being subjected to a reducing agent are prepared by synthesizing dendritic polymers having a core with a disulfide linkage or by reacting a dendritic polymer with a molecule containing a disulfide linkage and reactive terminal groups. In one aspect of the invention, dendritic polymers having a single disulfide functional group at the core are provided. The single disulfide group at the core can be reduced to form two sulfhydryl groups to which other molecules, such as proteins, oligonucleotides, peptides, hormones, other dendritic polymers, non-dendritic polymers, etc., can be bound.
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: February 1, 2000
    Assignee: Dendritech Inc.
    Inventors: June W. Klimash, Herbert M. Brothers, II, Douglas R. Swanson, Rui Yin, Ralph Spindler, Donald A. Tomalia, Yong Hsu, Roberta C. Cheng
  • Patent number: 5938934
    Abstract: Dendritic polymer based networks consisting of well-defined hydrophilic and oleophilic (i.e., hydrophobic) domains, are capable of performing as nanoscopic sponges for electrophilic guest moieties such as (i) inorganic and organic cations; (ii) charged or polarized molecules containing electrophilic constituent atoms or atomic groups; and (iii) other electrophilic organic, inorganic, or organometallic species. As a result of such performance, the networks yield novel nanoscopic organo-inorganic composites which contain organosilicon units as an integral part of their covalently bonded matrix.
    Type: Grant
    Filed: January 13, 1998
    Date of Patent: August 17, 1999
    Assignees: Dow Corning Corporation, Dendritech Inc.
    Inventors: Lajos Balogh, Agnes M. deLeuze-Jallouli, Petar R. Dvornic, Michael J. Owen, Susan Victoria Perz, Ralph Spindler
  • Patent number: 5919442
    Abstract: A novel class of hyper comb-branched polymers conjugated with carried materials are disclosed.
    Type: Grant
    Filed: August 9, 1996
    Date of Patent: July 6, 1999
    Assignees: Dendritech, Inc., University of Michigan
    Inventors: Rui Yin, Donald A. Tomalia, David M. Hedstrand, Douglas R. Swanson, James R. Baker, Jr., Jolanta F. Kukowska-Latallo
  • Patent number: 5773527
    Abstract: This invention discloses non-crosslinked, poly-branched polymers having a comb-burst configuration and a process for preparing such polymers.
    Type: Grant
    Filed: January 20, 1995
    Date of Patent: June 30, 1998
    Assignee: Dendritech, Inc.
    Inventors: Donald A. Tomalia, David M. Hedstrand, Rui Yin
  • Patent number: 5631329
    Abstract: The specification discloses a process for producing poly-branched polymer having relatively high molecular weight by forming a first set of branches by polymerizing monomers which are either protected against or are non-reactive to branching and grafting during polymerization, grafting that first set of branches to a core having a plurality of reactive sites capable of reacting with the reactive end units of said branches, either deprotecting or activating a plurality of monomeric units on each of said branches to create branch reactive sites, forming a second set of branches in the same manner as the first set of branches were formed, grafting the second set of branches to the first set of branches by reacting the reactive end units of the second set of branches with each said branch reactive site on said first set of branches and repeating the foregoing steps reiteratively to form and attach subsequent sets of branches to prior branch sets until a desired number of iterations has been effected.
    Type: Grant
    Filed: March 21, 1995
    Date of Patent: May 20, 1997
    Assignee: Dendritech, Inc.
    Inventors: Rui Yin, Donald A. Tomalia, David M. Hedstrand, Douglas R. Swanson