Patents by Inventor David Michael Stevens

David Michael Stevens 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: 20240368351
    Abstract: The present disclosure relates to controlling drug release in cross-linked poly(valerolactone) based matrices. In one aspect, the compounds or pharmaceutically acceptable salts thereof include a poly(valerolactone)-co-poly(allylvalerolactone)-co-polyethylene glycol (PEG) copolymer. In some embodiments, at least a portion of allylvalerolactone residues within the copolymer are crosslinked with a crosslinker. In some embodiments, the compound has a polydispersity index of less than or equal to 1.5. In one aspect, a method is described herein, comprising: (a) polymerizing valerolactone residues, allylvalerolactone, and polyethylene glycol residues in the presence of a non-metal catalyst via a ring opening polymerization to produce a poly(valerolactone)-co-poly(allylvalerolactone)-co-polyethylene glycol copolymer; (b) crosslinking the poly(valerolactone)-co-poly(allylvalerolactone)-co-polyethylene glycol copolymer with a crosslinker; and (c) loading a drug into the crosslinked copolymer.
    Type: Application
    Filed: November 13, 2023
    Publication date: November 7, 2024
    Inventors: Timothy Tordella RUCKH, Carl Eric ELMQUIST, David Michael STEVENS, Frantz LE DÉVÉDEC, Hilary BOUCHER, Christine ALLEN
  • Publication number: 20240065998
    Abstract: Oil compositions and compositions thereof that can form nanoemulsions or microemulsions are disclosed. Such compositions and compositions thereof can be useful for antimicrobial properties and be used to treat or prevent microbial infections.
    Type: Application
    Filed: October 12, 2023
    Publication date: February 29, 2024
    Inventors: Daniel J. MONTICELLO, Nathaniel Scott SCHOCKER, David Michael STEVENS
  • Patent number: 11905377
    Abstract: The present disclosure relates to controlling drug release in cross-linked poly(valerolactone) based matrices. In one aspect, the compounds or pharmaceutically acceptable salts thereof include a poly(valerolactone)-co-poly(allylvalerolactone)-co-polyethylene glycol (PEG) copolymer. In some embodiments, at least a portion of allylvalerolactone residues within the copolymer are crosslinked with a crosslinker. In some embodiments, the compound has a polydispersity index of less than or equal to 1.5. In one aspect, a method is described herein, comprising: (a) polymerizing valerolactone residues, allylvalerolactone, and polyethylene glycol residues in the presence of a non-metal catalyst via a ring opening polymerization to produce a poly(valerolactone)-co-poly(allylvalerolactone)-co-polyethylene glycol copolymer; (b) crosslinking the poly(valerolactone)-co-poly(allylvalerolactone)-co-polyethylene glycol copolymer with a crosslinker; and (c) loading a drug into the crosslinked copolymer.
    Type: Grant
    Filed: January 17, 2020
    Date of Patent: February 20, 2024
    Assignees: Pendant Biosciences, Inc., The Governing Council of the University of Toronto
    Inventors: Timothy Tordella Ruckh, Carl Eric Elmquist, David Michael Stevens, Frantz Le Dévédec, Hilary Boucher, Christine Allen
  • Publication number: 20240050422
    Abstract: Compositions and methods for the preparation of nanoemulsion from oils are disclosure. These nanoemulsions can be produced without the addition of exogenous surfactants or emulsifiers and can be useful as carriers for active ingredients.
    Type: Application
    Filed: October 12, 2023
    Publication date: February 15, 2024
    Inventors: Daniel J. MONTICELLO, Nathaniel Scott SCHOCKER, David Michael STEVENS
  • Publication number: 20230241232
    Abstract: The present invention is directed to a polymer platform comprising poly(L-lysine succinylated) which specifically targets scavenger receptor A1. This platform may be used to conjugate different types of drugs to the polymer for treatment of specific diseases or conditions in a patient. The resulting conjugates display moderate stability or controlled drug release, and allows for delivery and release of drugs and other therapeutic moieties to tissues/cells that express scavenger receptor A1 in a controlled manner.
    Type: Application
    Filed: June 9, 2021
    Publication date: August 3, 2023
    Inventors: Stephan Timothy Stern, David Michael Stevens, Jay Arthur Berzofsky, Julian Demond Burks
  • Publication number: 20200407514
    Abstract: The present disclosure relates to controlling drug release in cross-linked poly(valerolactone) based matrices. In one aspect, the compounds or pharmaceutically acceptable salts thereof include a poly(valerolactone)-co-poly(allylvalerolactone)-co-polyethylene glycol (PEG) copolymer. In some embodiments, at least a portion of allylvalerolactone residues within the copolymer are crosslinked with a crosslinker. In some embodiments, the compound has a polydispersity index of less than or equal to 1.5. In one aspect, a method is described herein, comprising: (a) polymerizing valerolactone residues, allylvalerolactone, and polyethylene glycol residues in the presence of a non-metal catalyst via a ring opening polymerization to produce a poly(valerolactone)-co-poly(allylvalerolactone)-co-polyethylene glycol copolymer; (b) crosslinking the poly(valerolactone)-co-poly(allylvalerolactone)-co-polyethylene glycol copolymer with a crosslinker; and (c) loading a drug into the crosslinked copolymer.
    Type: Application
    Filed: January 17, 2020
    Publication date: December 31, 2020
    Inventors: Timothy Tordella Ruckh, Carl Eric Elmquist, David Michael Stevens, Frantz Le Dévédec, Hilary Boucher, Christine Allen
  • Publication number: 20200316213
    Abstract: The present invention is directed to a polymer platform comprising poly(L-lysine succinylated) which specifically targets scavenger receptor A1. This platform may be used to conjugate different types of drugs to the polymer for treatment of specific diseases or conditions in a patient. The resulting conjugates display moderate stability or controlled drug release of about 3-80 hours in plasma, and allow delivery and release of drugs and other therapeutic moieties to tissues/cells that express scavenger receptor A1 in a controlled manner.
    Type: Application
    Filed: October 15, 2018
    Publication date: October 8, 2020
    Inventors: David Michael Stevens, Stephan Timothy Stern, Scott McNeil, Marina A. Dobrovolskaia
  • Publication number: 20170100343
    Abstract: Disclosed are crosslinked particles (e.g., microparticles) that are capable of storing and releasing drugs. The particles can be macroparticles, microparticles, or nanoparticles and can be composed of polyester backbones. The particles can be loaded with a drug. The particles can degrade in vivo to release the drug. The particles can be prepared by crosslinking functionalized polyester backbones and loaded with a given drug. The particles of the present disclosure can be injected with a syringe. In some embodiments, the particles of the present disclosure are administered in connection with a surgery and release the drug after the site of the surgery for a period of 1-6 months.
    Type: Application
    Filed: October 7, 2016
    Publication date: April 13, 2017
    Inventors: Frantz Le Dévédec, Christine Jane Allen, David Michael Stevens, Dean James Rager-Aguiar, Timothy Tordella Ruckh, Carl Eric Elmquist