Patents by Inventor Paul Ashton

Paul Ashton 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: 20050025834
    Abstract: The present invention relates to sustained release drug delivery systems, medical devices incorporating said systems, and methods of use and manufacture thereof. The inventive systems feature bioerodible drug delivery devices that include biocompatible solid and biocompatible fluid compositions to achieve desired sustained release drug delivery.
    Type: Application
    Filed: June 25, 2004
    Publication date: February 3, 2005
    Applicant: Control Delivery Systems, Inc.
    Inventors: Hong Guo, Jianbing Chen, Dongling Su, Paul Ashton
  • Publication number: 20050008695
    Abstract: The invention relates to codrugs having improved properties, methods for preparing and administering them, and methods of formulating and administering the codrugs as pharmaceutical preparations. In certain embodiments, the codrugs can be locally administered to deliver the constituent biologically active compound in a sustained-release fashion, reducing systemic concentrations of the biologically active compound.
    Type: Application
    Filed: May 21, 2004
    Publication date: January 13, 2005
    Applicant: Control Delivery Systems, Inc.
    Inventors: Paul Ashton, Jianbing Chen, Hong Guo, Grazyna Cynkowska, Tadeusz Cynkowski
  • Publication number: 20040254154
    Abstract: The instant invention provides methods (including business methods) and reagents (including packaged pharmaceutical compositions) for use in predicting the long term effect on visual acuity (VA) of a pharmaceutical or treatment regimen in a patient with macular edema.
    Type: Application
    Filed: May 7, 2004
    Publication date: December 16, 2004
    Applicant: Control Delivery Systems, Inc.
    Inventor: Paul Ashton
  • Publication number: 20040221855
    Abstract: The invention provides statistical methods for identifying measurements that can be used to generate variables that are associated with clinical outcomes of treatment regimens for disease. The invention also provides methods for using such measurements to monitor the effectiveness of an ongoing disease treatment regimen, databases which contain information about measurements and variables and their relationships to clinical outcomes, and pharmaceutical products which incorporate instructions on the use of the methods and databases of the invention. The invention provides a specific application of these methods and products to the treatment of ocular diseases, particularly macular edema, in particular for the treatment of macular edema with implantable devices and compositions that provide sustained release of corticosteroids.
    Type: Application
    Filed: October 17, 2003
    Publication date: November 11, 2004
    Inventor: Paul Ashton
  • Publication number: 20040214784
    Abstract: The present invention relates to the field of prodrugs of chemotherapeutic agents and method of use thereof.
    Type: Application
    Filed: May 24, 2004
    Publication date: October 28, 2004
    Applicant: UNIVERSITY OF KENTUCKY RESEARCH FOUNDATION
    Inventors: Peter A. Crooks, Tadeusz Cynkowski, Grazyna Cynkowska, Hong Guo, Paul Ashton
  • Publication number: 20040208910
    Abstract: The invention provides a device and method for treating and/or preventing raised intraocular pressure, such as that associated with glaucoma or the use of corticosteroids with adrenergic agents. The invention provides insertable sustained-release devices adapted to maintain a therapeutically effective concentration of one or more adrenergic agents for an extended period of time, and a method of use thereof.
    Type: Application
    Filed: January 22, 2004
    Publication date: October 21, 2004
    Applicant: Control Delivery Systems, Inc.
    Inventors: Paul Ashton, Hong Guo
  • Publication number: 20040180036
    Abstract: A salt of a codrug of at least two drug compounds covalently linked to one another via a labile bond to form a single codrug, and methods of use of the codrug salt for the treatment of various medical conditions. The codrug salt may be administered by itself or in the form of a bioerodible or nonbioerodible substance.
    Type: Application
    Filed: January 21, 2004
    Publication date: September 16, 2004
    Applicant: Control Delivery Systems, Inc.
    Inventors: Paul Ashton, Tadeusz Cynkowski, Grazyna Cynkowska
  • Publication number: 20040175410
    Abstract: The invention provides a device and method for treating and/or preventing raised intraocular pressure, such as that associated with glaucoma or the use of corticosteroids, with carbonic anhydrase inhibitors. The invention provides insertable sustained-release devices adapted to maintain a therapeutically effective concentration of one or more carbonic anhydrase inhibitors for an extended period of time, and a method of use thereof.
    Type: Application
    Filed: January 22, 2004
    Publication date: September 9, 2004
    Applicant: Control Delivery Systems, Inc.
    Inventors: Paul Ashton, Hong Guo
  • Publication number: 20040175426
    Abstract: The invention provides for sustained release formulations for systemic delivery of drugs or other therapeutic agents that are highly soluble in water. Methods of administration of the agents and devices useful for administration are also disclosed. In particular, sustained release formulations are disclosed for the treatment of glaucoma, including methods and devices suitable for the administration of the formulations.
    Type: Application
    Filed: January 23, 2004
    Publication date: September 9, 2004
    Applicant: Control Delivery Systems, Inc.
    Inventor: Paul Ashton
  • Publication number: 20040176341
    Abstract: An injectable drug delivery device includes a core containing one or more drugs and one or more polymers. The core may be surrounded by one or more polymer outer layers (referred to herein as “coatings,” “skins,” or “outer layers”). In certain embodiments, the device is formed by extruding or otherwise preforming a polymeric skin for a drug core. The drug core may be co-extruded with the skin, or inserted into the skin after the skin has been extruded, and possibly cured. In other embodiments, the drug core may be coated with one or more polymer coatings. These techniques may be usefully applied to fabricate devices having a wide array of drug formulations and skins that can be selected to control the release rate profile and various other properties of the drugs in the drug core in a form suitable for injection using standard or non-standard gauge needles.
    Type: Application
    Filed: November 13, 2003
    Publication date: September 9, 2004
    Inventors: Kang-Jye Chou, Hong Guo, Paul Ashton, Robert W. Shimizu, David A. Watson
  • Publication number: 20040151754
    Abstract: The subject invention relates to methods and compositions of steroid suspensions suitable for intraocular use in the treatment or prevention of a variety of ocular diseases. Specifically, the invention provides pharmaceutical compositions with significantly reduced endotoxin levels that are suitable for intraocular use. The invention also relates to methods of reducing the level of endotoxins within certain compositions, such as pharmaceutical compositions, that can be used for intraocular delivery.
    Type: Application
    Filed: December 19, 2003
    Publication date: August 5, 2004
    Applicant: Control Delivery Systems, Inc.
    Inventor: Paul Ashton
  • Patent number: 6765019
    Abstract: The present invention relates to the field of prodrugs of chemotherapeutic agents and method of use thereof.
    Type: Grant
    Filed: May 4, 2000
    Date of Patent: July 20, 2004
    Assignee: University of Kentucky Research Foundation
    Inventors: Peter A. Crooks, Tadeusz Cynkowski, Grazyna Cynkowska, Hong Guo, Paul Ashton
  • Publication number: 20040121014
    Abstract: The present invention relates to a method for administering a corticosteroid to a posterior segment of an eye. In the method, a sustained release device is implanted to deliver the corticosteroid to the eye. The aqueous corticosteroid concentration remains less than vitreous corticosteroid concentration during release of the corticosteroid from the device.
    Type: Application
    Filed: November 14, 2003
    Publication date: June 24, 2004
    Applicant: Control Delivery Systems, Inc.
    Inventors: Hong Guo, Paul Ashton
  • Publication number: 20040115268
    Abstract: The systems and methods disclosed herein provide sustained delivery of a therapeutic agent for treating a patient, e.g., human, to obtain a desired local or systemic physiological or pharmacological effect. Method includes positioning the sustained released drug delivery system at an area wherein release of the agent is desired and allowing the agent to pass through the device to the desired area of treatment. In some embodiments, the method is for treating or reducing the risk of retroviral or lentiviral infection. In certain embodiments, the method is for preventing or reducing the risk of mother-to-child transmission of HIV, wherein the therapeutic agent is an antiviral agent.
    Type: Application
    Filed: November 13, 2003
    Publication date: June 17, 2004
    Applicant: Control Delivery Systems, Inc.
    Inventors: Paul Ashton, Jianbing Chen, Thomas J. Smith
  • Publication number: 20040022853
    Abstract: Disclosed is a sustained release system that includes a polymer and a pharmaceutically active agent dispersed in the polymer. The agent is in granular or particulate form, and has a rate of release from the system that is limited primarily by the rate at which the agent dissolves from the granules into the polymer matrix. Advantageously, the polymer is permeable to the agent and is non-release-rate-with limiting with respect to the rate of release of the agent from the polymer.
    Type: Application
    Filed: May 30, 2003
    Publication date: February 5, 2004
    Applicant: Control Delivery Systems, Inc.
    Inventors: Paul Ashton, Jianbing Chen, Hong Guo
  • Publication number: 20040009222
    Abstract: A drug delivery device can, in whole or in part, be formed by co-extruding a drug core and an outer tube. The outer tube may be permeable, semi-permeable, or impermeable to the drug. The drug core may include a polymer matrix which does not significantly affect the release rate of the drug. The outer tube, the polymer matrix of the drug core, or both may be bioerodible. The co-extruded product can be segmented into drug delivery devices. The devices may be left uncoated so that their respective ends are open, or the devices may be coated with, for example, a layer that is permeable to the drug, semi-permeable to the drug, or bioerodible.
    Type: Application
    Filed: May 2, 2003
    Publication date: January 15, 2004
    Applicant: Control Delivery Systems, Inc.
    Inventors: Kang-Jye Chou, Hong Guo, Paul Ashton, Robert W. Shimizu
  • Publication number: 20030229390
    Abstract: Disclosed is a sustained release system that includes a polymer, a nucleoside analog or prodrug or codrug thereof, and optionally one or more additives that reduce the rate of release of the drug from the polymer. The device using such inventive system permits improved drug delivery in a localized manner over a prolonged period of time.
    Type: Application
    Filed: March 27, 2003
    Publication date: December 11, 2003
    Applicant: Control Delivery Systems, Inc.
    Inventors: Paul Ashton, Jianbing Chen
  • Publication number: 20030229333
    Abstract: Loss of hearing can be treated by implanting a sustained-release drug delivery device in the inner ear. The slow delivery of medication from the implanted device to the tissues of the ear, including the inner ear, can treat numerous conditions of the ear while avoiding the side effects associated with systemic administration.
    Type: Application
    Filed: February 24, 2003
    Publication date: December 11, 2003
    Applicant: Control Delivery Systems, Inc.
    Inventors: Paul Ashton, Hong Guo, Thomas J. Smith
  • Publication number: 20030203030
    Abstract: Implantable, injectable, insertable, or otherwise administrable compositions that form hydrogels when implanted, injected, inserted, or administered into or onto living tissues comprise a pharmaceutically effective compound wherein the pharmaceutically effective compound is a codrug, or pharmaceutically acceptable salt or prodrug thereof in admixture with a hydrogel-forming compound. The pharmaceutically effective compound may be any compound that is soluble in bodily fluids, or that forms bodily fluid-soluble adducts when exposed to bodily fluids. Exemplary compounds include analgesic, anti-inflammatory and antibiotic compounds. The hydrogel-forming compound is a biologically tolerated substance that forms a hydrogel upon exposure to bodily fluids, such as the interstitial fluid surrounding or within a joint.
    Type: Application
    Filed: January 21, 2003
    Publication date: October 30, 2003
    Applicant: Control Delivery Systems, Inc.
    Inventors: Paul Ashton, Jianbing Chen
  • Publication number: 20030170286
    Abstract: Genitourinary system disorders are treated with therapeutic agents, and optionally further with radiation treatments.
    Type: Application
    Filed: December 10, 2002
    Publication date: September 11, 2003
    Inventors: Paul Ashton, Grazyna Cynkowska, Tadeusz Cynkowski, Thomas J. Smith