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).
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Publication number: 20230120666Abstract: 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: ApplicationFiled: December 15, 2022Publication date: April 20, 2023Applicant: NanoSynthons LLCInventors: Donald A. Tomalia, David M. Hedstrand, Mayank K. Singh, Linda S. Nixon
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Patent number: 10968176Abstract: 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: GrantFiled: July 12, 2019Date of Patent: April 6, 2021Assignee: NanoSynthons LLCInventors: Donald A Tomalia, David M Hedstrand, Linda S Nixon
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Publication number: 20190352258Abstract: 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: ApplicationFiled: July 12, 2019Publication date: November 21, 2019Applicant: NanoSynthons LLCInventors: Donald A. Tomalia, David M. Hedstrand, Linda S. Nixon
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Patent number: 10420849Abstract: 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: GrantFiled: September 14, 2015Date of Patent: September 24, 2019Assignee: NanoSynthons LLCInventors: Donald A Tomalia, David M Hedstrand, Linda S Nixon
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Publication number: 20170246323Abstract: 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: ApplicationFiled: September 14, 2015Publication date: August 31, 2017Applicant: NanoSynthons LLCInventors: Donald A Tomalia, David M Hedstrand, Linda S Nixon
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Patent number: 6312679Abstract: 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: GrantFiled: March 24, 1993Date of Patent: November 6, 2001Assignee: The Dow Chemical CompanyInventors: 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
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Patent number: 6177414Abstract: 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: GrantFiled: March 8, 2000Date of Patent: January 23, 2001Assignee: The Dow Chemical CompanyInventors: Donald A. Tomalia, William J. Kruper, Roberta C. Cheng, Ian A. Tomlinson, Michael J. Fazio, David M. Hedstrand, Larry R. Wilson, Donald A. Kaplan
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Patent number: 5919442Abstract: A novel class of hyper comb-branched polymers conjugated with carried materials are disclosed.Type: GrantFiled: August 9, 1996Date of Patent: July 6, 1999Assignees: Dendritech, Inc., University of MichiganInventors: Rui Yin, Donald A. Tomalia, David M. Hedstrand, Douglas R. Swanson, James R. Baker, Jr., Jolanta F. Kukowska-Latallo
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Patent number: 5773527Abstract: This invention discloses non-crosslinked, poly-branched polymers having a comb-burst configuration and a process for preparing such polymers.Type: GrantFiled: January 20, 1995Date of Patent: June 30, 1998Assignee: Dendritech, Inc.Inventors: Donald A. Tomalia, David M. Hedstrand, Rui Yin
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Patent number: 5714166Abstract: 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: GrantFiled: March 7, 1995Date of Patent: February 3, 1998Assignees: The Dow Chemical Company, Dendritech Incorporated, The Regents of the University of MichiganInventors: 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
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Patent number: 5631329Abstract: 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: GrantFiled: March 21, 1995Date of Patent: May 20, 1997Assignee: Dendritech, Inc.Inventors: Rui Yin, Donald A. Tomalia, David M. Hedstrand, Douglas R. Swanson
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Patent number: 5560929Abstract: 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: GrantFiled: November 12, 1993Date of Patent: October 1, 1996Assignee: The Dow Chemical CompanyInventors: David M. Hedstrand, Bradley J. Helmer, Donald A. Tomalia
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Patent number: 5527524Abstract: 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: GrantFiled: April 5, 1993Date of Patent: June 18, 1996Assignee: The Dow Chemical CompanyInventors: 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
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Patent number: 5393797Abstract: 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: GrantFiled: June 13, 1994Date of Patent: February 28, 1995Assignee: The Dow Chemical CompanyInventors: David M. Hedstrand, Donald A. Tomalia
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Patent number: 5393795Abstract: 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: GrantFiled: June 13, 1994Date of Patent: February 28, 1995Assignee: The Dow Chemical CompanyInventors: David M. Hedstrand, Donald A. Tomalia
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Patent number: 5387617Abstract: 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: GrantFiled: November 8, 1993Date of Patent: February 7, 1995Assignee: The Dow Chemical CompanyInventors: David M. Hedstrand, Donald A. Tomalia
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Patent number: 5338532Abstract: 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: GrantFiled: February 13, 1991Date of Patent: August 16, 1994Assignee: The Dow Chemical CompanyInventors: 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
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Patent number: 4684398Abstract: Disclosed are certain cyanoguanidines and cyanoisothioureas that are useful as herbicides.Type: GrantFiled: March 17, 1986Date of Patent: August 4, 1987Assignee: The Dow Chemical CompanyInventors: Joseph E. Dunbar, David M. Hedstrand
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Patent number: 4661520Abstract: 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: GrantFiled: August 17, 1984Date of Patent: April 28, 1987Assignee: The Dow Chemical CompanyInventors: Joseph E. Dunbar, David M. Hedstrand, Kimiaki Maruyama