Patents by Inventor David M. Hedstrand

David M. Hedstrand 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).

  • Publication number: 20230120666
    Abstract: Four major polymeric architectures, namely: (a) linear, (b) branched, (c) hyperbranched/dendritic and (d) cross-linked polymers, when formed by reaction of multifunctional alcohols, such as sugar-based alpha-, beta- or gamma-cyclodextrins, with multi-carboxylic acids form unique polyester copolymers. These copolymers have been demonstrated to substantially enhance the water-solubility and bioavailability of water insoluble compounds for a wide variety of uses.
    Type: Application
    Filed: December 15, 2022
    Publication date: April 20, 2023
    Applicant: NanoSynthons LLC
    Inventors: Donald A. Tomalia, David M. Hedstrand, Mayank K. Singh, Linda S. Nixon
  • Patent number: 10968176
    Abstract: Simple organic structures, organic/inorganic polymers, and other substrates have been made, all of which have at least one pyrrolidone moiety present, and found to exhibit low toxicity, low complement activation features and may be used to reduce protein interactions with drug conjugates while enhancing in vivo residency times for these conjugates when used as an injectable composition; thus these compounds can be used as substitutes for PEG in PEGylation. Surprisingly, these compounds also exhibit unique intrinsic fluorescence (IF) or non-traditional fluorescence (NTF) properties that currently cannot be explained by traditional photochemistry and fluorescence paradigms are described.
    Type: Grant
    Filed: July 12, 2019
    Date of Patent: April 6, 2021
    Assignee: NanoSynthons LLC
    Inventors: Donald A Tomalia, David M Hedstrand, Linda S Nixon
  • Publication number: 20190352258
    Abstract: Simple organic structures, organic/inorganic polymers, and other substrates have been made, all of which have at least one pyrrolidone moiety present, and found to exhibit low toxicity, low complement activation features and may be used to reduce protein interactions with drug conjugates while enhancing in vivo residency times for these conjugates when used as an injectable composition; thus these compounds can be used as substitutes for PEG in PEGylation. Surprisingly, these compounds also exhibit unique intrinsic fluorescence (IF) or non-traditional fluorescence (NTF) properties that currently cannot be explained by traditional photochemistry and fluorescence paradigms are described.
    Type: Application
    Filed: July 12, 2019
    Publication date: November 21, 2019
    Applicant: NanoSynthons LLC
    Inventors: Donald A. Tomalia, David M. Hedstrand, Linda S. Nixon
  • Patent number: 10420849
    Abstract: Simple organic structures, organic/inorganic polymers, and other substrates have been made, all of which have at least one pyrrolidone moiety present, and found to exhibit low toxicity, low complement activation features and may be used to reduce protein interactions with drug conjugates while enhancing in vivo residency times for these conjugates when used as an injectable composition; thus these compounds can be used as substitutes for PEG in PEGaylation. Surprisingly, these compounds also exhibit unique intrinsic fluorescence (IF) or non-traditional fluorescence (NTF) properties that currently cannot be explained by traditional photochemistry and fluorescence paradigms are described.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: September 24, 2019
    Assignee: NanoSynthons LLC
    Inventors: Donald A Tomalia, David M Hedstrand, Linda S Nixon
  • Publication number: 20170246323
    Abstract: Simple organic structures, organic/inorganic polymers, and other substrates have been made, all of which have at least one pyrrolidone moiety present, and found to exhibit low toxicity, low complement activation features and may be used to reduce protein interactions with drug conjugates while enhancing in vivo residency times for these conjugates when used as an injectable composition; thus these compounds can be used as substitutes for PEG in PEGaylation. Surprisingly, these compounds also exhibit unique intrinsic fluorescence (IF) or non-traditional fluorescence (NTF) properties that currently cannot be explained by traditional photochemistry and fluorescence paradigms are described.
    Type: Application
    Filed: September 14, 2015
    Publication date: August 31, 2017
    Applicant: NanoSynthons LLC
    Inventors: Donald A Tomalia, David M Hedstrand, Linda S Nixon
  • Patent number: 6312679
    Abstract: Starburst conjugates which are composed of at least one dendrimer in association with at least one unit of a carried agricultural, pharmaceutical, or other material have been prepared. These conjugates have particularly advantageous properties due to the unique characteristics of the dendrimer.
    Type: Grant
    Filed: March 24, 1993
    Date of Patent: November 6, 2001
    Assignee: The Dow Chemical Company
    Inventors: Donald A. Tomalia, Donald A. Kaplan, William J. Kruper, Jr., Roberta C. Cheng, Ian A. Tomlinson, Michael J. Fazio, David M. Hedstrand, Larry R. Wilson
  • Patent number: 6177414
    Abstract: Starburst conjugates which are composed of at least one dendrimer in association with at least one unit of a carried agricultural, pharmaceutical, or other material have been prepared. These conjugates have particularly advantageous properties due to the unique characteristics of the dendrimer.
    Type: Grant
    Filed: March 8, 2000
    Date of Patent: January 23, 2001
    Assignee: The Dow Chemical Company
    Inventors: Donald A. Tomalia, William J. Kruper, Roberta C. Cheng, Ian A. Tomlinson, Michael J. Fazio, David M. Hedstrand, Larry R. Wilson, Donald A. Kaplan
  • 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: 5714166
    Abstract: Dendritic polymer conjugates which are composed of at least one dendrimer in association with at least one unit of a carried material, where the carrier material can be a biological response modifier, have been prepared. The conjugate can also have a target director present, and when it is present then the carried material may be a bioactive agent. Preferred dendritic polymers are dense star polymers, which have been complexed with biological response modifiers. These conjugates and complexes have particularly advantageous properties due to their unique characteristics.
    Type: Grant
    Filed: March 7, 1995
    Date of Patent: February 3, 1998
    Assignees: The Dow Chemical Company, Dendritech Incorporated, The Regents of the University of Michigan
    Inventors: Donald A. Tomalia, James R. Baker, Roberta C. Cheng, Anna U. Bielinska, Michael J. Fazio, David M. Hedstrand, Jennifer A. Johnson, Donald A. Kaplan, deceased, Scott L. Klakamp, William J. Kruper, Jr., Jolanta Kukowska-Latallo, Bartley D. Maxon, Lars T. Piehler, Ian A. Tomlinson, Larry R. Wilson, Rui Yin, Herbert M. Brothers, II
  • 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
  • Patent number: 5560929
    Abstract: Dense star polymers or dendrimers having a highly branched interior structure capable of associating or chelating with metal ions are modified by capping with a hydrophobic group capable of providing a hydrophobic outer shell. The modified dendrimers are useful for dispersing metal ions in a non-aqueous polymer matrix. Also dense star polymers or dendrimers having a highly branched hydrophilic interior structure are modified by capping with a hydrophobic group capable of providing a hydrophobic outer shell, which modified polymers are useful as gels and surfactants.
    Type: Grant
    Filed: November 12, 1993
    Date of Patent: October 1, 1996
    Assignee: The Dow Chemical Company
    Inventors: David M. Hedstrand, Bradley J. Helmer, Donald A. Tomalia
  • Patent number: 5527524
    Abstract: Dense star polymer conjugates which are composed of at least one dendrimer in association with at least one unit of a carried agricultural, pharmaceutical, or other material have been prepared. These conjugates have particularly advantageous properties due to the unique characteristics of the dendrimer.
    Type: Grant
    Filed: April 5, 1993
    Date of Patent: June 18, 1996
    Assignee: The Dow Chemical Company
    Inventors: Donald A. Tomalia, Larry R. Wilson, David M. Hedstrand, Ian A. Tomlinson, Michael J. Fazio, William J. Kruper, Jr., Donald A. Kaplan, Roberta C. Cheng, David S. Edwards, Chu W. Jung
  • Patent number: 5393797
    Abstract: A small cell foam having a modified dense star polymer or dendrimer is described. This modified dense star polymer or dendrimer has a highly branched interior of one monomeric composition and an exterior structure of a different monomeric composition capable of providing a hydrophobic outer shell and a particle diameter of from about 5 to about 1,000 nm with a matrix polymer.
    Type: Grant
    Filed: June 13, 1994
    Date of Patent: February 28, 1995
    Assignee: The Dow Chemical Company
    Inventors: David M. Hedstrand, Donald A. Tomalia
  • Patent number: 5393795
    Abstract: Dense star polymers or dendrimers, modified by capping with a hydrophobic group capable of providing a hydrophobic outer shell, act as molecular nucleating agents in forming a polymer blend.
    Type: Grant
    Filed: June 13, 1994
    Date of Patent: February 28, 1995
    Assignee: The Dow Chemical Company
    Inventors: David M. Hedstrand, Donald A. Tomalia
  • Patent number: 5387617
    Abstract: Dense star polymers or dendrimers, modified by capping with a hydrophobic group capable of providing a hydrophobic outer shell, act as molecular nucleating agents. These modified dense star polymers or dendrimers are particularly effective for the production of small cell foams.
    Type: Grant
    Filed: November 8, 1993
    Date of Patent: February 7, 1995
    Assignee: The Dow Chemical Company
    Inventors: David M. Hedstrand, Donald A. Tomalia
  • Patent number: 5338532
    Abstract: Starburst conjugates which are composed of at least one dendrimer in association with at least one unit of a carried agricultural, pharmaceutical, or other material have been prepared. These conjugates have particularly advantageous properties due to the unique characteristics of the dendrimer.
    Type: Grant
    Filed: February 13, 1991
    Date of Patent: August 16, 1994
    Assignee: The Dow Chemical Company
    Inventors: Donald A. Tomalia, Donald A. Kaplan, William J. Kruper, Jr., Roberta C. Cheng, Ian A. Tomlinson, Michael J. Fazio, David M. Hedstrand, Larry R. Wilson
  • Patent number: 4684398
    Abstract: Disclosed are certain cyanoguanidines and cyanoisothioureas that are useful as herbicides.
    Type: Grant
    Filed: March 17, 1986
    Date of Patent: August 4, 1987
    Assignee: The Dow Chemical Company
    Inventors: Joseph E. Dunbar, David M. Hedstrand
  • Patent number: 4661520
    Abstract: This invention relates to a novel cyanoguanidine compound, N'-cyano-N-(1,2,3,4-tetrahydro-1-naphthyl)guanidine, which is useful as an animal growth promoting agent.
    Type: Grant
    Filed: August 17, 1984
    Date of Patent: April 28, 1987
    Assignee: The Dow Chemical Company
    Inventors: Joseph E. Dunbar, David M. Hedstrand, Kimiaki Maruyama