Patents Assigned to UNIVERSITY OF THE WITWATERSRAND
  • Patent number: 9205049
    Abstract: This invention relates to a multi-configured, transmucosal pharmaceutical dosage form and, more particularly, to a pharmaceutical dosage form which has a single monolithic/heterogeneous layer or a plurality of such layers. The dosage form is suitable for the delivery of one or more pharmaceutical compositions via the buccal, sublingual, rectal, vaginal or transmucosal delivery route in a human or animal body. It provides for selected delivery profiles resulting from, but not limited to, a porosity-enabled composite matrix of one or more layers/components of the pharmaceutical composition/s. The invention also provides for a method of manufacturing said transmucosal pharmaceutical dosage form in a plurality of configurations.
    Type: Grant
    Filed: June 3, 2009
    Date of Patent: December 8, 2015
    Assignee: University of the Witwatersrand, Johannesburg
    Inventors: Deshika Reddy, Oluwatoyin Ayotomilola Adeleke, Viness Pillay, Yahya Choonara
  • Publication number: 20150274765
    Abstract: The present invention relates to a pharmaceutical dosage form which may comprise carbamoyl glycinated chitosan, and particularly it relates to a pharmaceutical dosage form comprising the novel polymer in a lyophilized polymeric wafer form which shows rapid disintegration and dissolution characteristics in use.
    Type: Application
    Filed: September 11, 2013
    Publication date: October 1, 2015
    Applicant: UNIVERSITY OF THE WITWATERSRAND, JOHANNESBURG
    Inventors: Pradeep Kumar, Viness Pillay, Yahya Essop Choonara
  • Patent number: 9129595
    Abstract: This invention relates to a means for compensating for a whole or partial loss of speech. The means has a sensor unit in the form of a Logometrix pseudo palate and a palatometer which sense the position of a user's tongue while endeavouring to articulate words or sounds. The sensor unit is connected to a comparator which makes use of suitable artificial intelligence algorithms (such as Multi-Layer Perceptron Neural Networks and Hidden Markov Models) together with a library of stored words and sounds as well as tongue positions and signals related to jaw and lip movement as well as inhalation and exhalation to match words or sounds and transmit the matched words or sounds to a loudspeaker. Preferably the output of the loudspeaker will simulate the natural voice of the user.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: September 8, 2015
    Assignee: UNIVERSITY OF THE WITWATERSRAND
    Inventors: Megan Jill Russell, David Milton Rubin, Brian Wigdorowitz, Tshilidzi Marwala
  • Patent number: 9125900
    Abstract: This invention relates to a pharmaceutical composition for mammals and, more particularly, to a pharmaceutical composition which enhances the action of an anaesthetic used in both human and veterinary applications, which, at least partly, reduces the risk of respiratory depression and enhances pulmonary perfusion. The pharmaceutical composition is characterized in that it contains a serotonergic ligand or any pharmacologically acceptable salt or ester thereof which acts on at least one member of the 5-HT family of serotonergic receptors, preferably on one or more of the 5-HTiA, 5-HT4 and 5-HT7 serotonergic receptors. In an example the ligand is the 8-OH-DPAT ligand. The composition can be used in conjunction with or include an anaesthetic, preferably an opioid anaesthetic, to induce a state of anaesthesia in mammals and it can be used to immobilize wile or non-domestic mammals.
    Type: Grant
    Filed: September 14, 2006
    Date of Patent: September 8, 2015
    Assignee: University of the Witwatersrand, Johannesburg
    Inventor: Leith Carl Rodney Meyer
  • Patent number: 9102525
    Abstract: The invention provides a process for producing carbon nanotubes which includes supplying a continuous fluidized feed of a catalyst and at least one hydrocarbon to a reactor operating under conditions suitable to produce carbon nanotubes. The fluid is made to flow though the reactor with a swirling motion which ensures that the internal surfaces of the reactor are cleaned of deposits.
    Type: Grant
    Filed: August 29, 2006
    Date of Patent: August 11, 2015
    Assignee: University of the Witwatersrand
    Inventor: Sunny Esayegbemu Iyuke
  • Publication number: 20150209275
    Abstract: This invention relates to a pharmaceutical dosage form, particularly to a topical ocular pharmaceutical dosage form comprising a polymeric matrix of polyethylene oxide block copolymer, preferably polyoxyethylene-polyoxypropylene block copolymer and hydroxpropyl cellulose, and a pharmaceutically active ingredient incorporated within the matrix. The invention extends to a method of manufacturing the pharmaceutical dosage form.
    Type: Application
    Filed: September 11, 2013
    Publication date: July 30, 2015
    Applicant: UNIVERSITY OF THE WITWATERSRAND, JOHANNESBURG
    Inventors: Yahya Essop Choonara, Lisa Claire du Toit, Pradeep Kumar, Viness Pillay, Raeesa M. Moosa, Rafeeq Jhetam
  • Patent number: 9084757
    Abstract: This invention relates to an osteogenic device for the de novo induction of bone formation in a mammal. The device contains at least one transforming growth factor-?3 isoform and a retention matrix. The device is introduced by direct injection or surgical implantation into an area where de novo bone formation is desired and, once implanted, the retention matrix acts to retain the TGF-?3 isoform at its place of introduction and forms a scaffold for generated bone, the induction of which is promoted by the TGF-?3 isoform. The device may be used to induce bone growth where bone has been debrided in a surgical procedure and it may also be used to transform neoplastic primary and/or metastatic secondary masses into bone thus facilitating surgical debridement thereof.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: July 21, 2015
    Assignees: UNIVERSITY OF THE WITWATERSRAND, JOHANNESBURG, RIPAMONTI, UGO BONE RESEARCH LABORATORY, FACULTY OF HEALTH SCIENCES, MEDICAL RESEARCH COUNCIL OF SOUTH AFRICA
    Inventor: Ugo Ripamonti
  • Publication number: 20140378299
    Abstract: This invention relates to a titanium dioxide catalyst particle, the catalyst particle comprising ruffle nanorods having metal nanoparticles deposited at or near the free ends of the nanorods, which is suitable to catalyse reactions after exposure to temperatures above 550 deg C. The invention also provides for the use of a catalyst particle in catalysing reactions and a method of catalysing reactions, the catalyst particle being suitable to catalyse reactions after exposure to temperatures above 550 deg C.
    Type: Application
    Filed: August 19, 2012
    Publication date: December 25, 2014
    Applicant: University of the Witwatersrand, Johannesburg
    Inventors: Dean Howard Barrett, Paul John Franklyn
  • Publication number: 20140350080
    Abstract: This invention relates to modified short interfering RNA (siRNA) nucleic acid molecules, particularly siRNA's which have been modified by the addition of a 2-0-guanidinopropyl (GP) modified nucleoside. In particular the invention relates to modified siRNAs which are capable of silencing target sequences, methods of treating and preventing infection by using the siRNAs, medicaments containing the siRNAs and use of the siRNAs.
    Type: Application
    Filed: October 26, 2012
    Publication date: November 27, 2014
    Applicant: UNIVERSITY OF THE WITWATERSRAND, JOHANNESBURG
    Inventors: Patrick Arbuthnot, Justin Hean, Abdullah Ely, Musa Marimani, Jolanta Brzezinska, Jennifer D'Onofrio, Maximilian C.R. Buff, Joachim W. Engels, Stefan Bernhardt
  • Patent number: 8894018
    Abstract: This invention discloses a method to break down, destabilize, or destroy an in flight wake vortex shed from an aircraft's wing. The wingtip has a winglet mounted to an extremity of the wing, and means for actuating displacement of the winglet relative to the wing. The winglet is displaced from a stationary position, in which the in flight wake vortex is stable, to a continuous moving condition, in which the winglet is displaced to a secondary temporary stationary position, remote from the initial stationary position, and having any angle relative to a plane extending through a vertical, longitudinal, or lateral axis of the aircraft to alter the winglet's angle of attack, and persisting in the moving condition as long as required to break down, destabilize or destroy the in flight wake vortex. The invention includes a wingtip arrangement for use in the method and an aircraft including the wingtip arrangement.
    Type: Grant
    Filed: December 10, 2010
    Date of Patent: November 25, 2014
    Assignee: University of the Witwatersrand
    Inventors: Michael Frederick Boer, Anthony Charles Hoffe
  • Publication number: 20140220041
    Abstract: The invention relates to a method of modulating concentration of Alzheimer's Disease (AD) relevant proteins amyloid precursor protein (APP), beta (?) and gamma (?) secretases and amyloid beta peptide (A?), and also relates to a method of reducing A? shedding. Furthermore, this invention extends to a compound for use in the treatment of AD, and also to a method of treating AD.
    Type: Application
    Filed: September 19, 2012
    Publication date: August 7, 2014
    Applicant: University of the Witwatersrand, Johannesburg
    Inventors: Stefan Franz Thomas Weiss, Katarina Jovanovic, Danielle Gonsavles, Bianca Da Costa Dias, Stefan Knackmuss, Uwe Reusch, Melvyn Little, Marc Saul Weinberg
  • Patent number: 8778396
    Abstract: This invention relates to an orally administrable, gastroretentive pharmaceutical dosage form which contains at least one pharmaceutically active ingredient and at least one polymeric adjuvant. The adjuvant serves to retain the dosage form in a selected region of the gastrointestinal tract for sufficient time for the pharmaceutically active ingredient to be released and absorbed. Ideally the dosage form will contain two or more pharmaceutically active ingredients which are delivered to different regions of the gastrointestinal tract.
    Type: Grant
    Filed: June 3, 2009
    Date of Patent: July 15, 2014
    Assignee: University of the Witwatersrand, Johannesburg
    Inventors: Viness Pillay, Yahya Choonara, Caragh Murphy, Sarashnee Moonisami
  • Publication number: 20140148495
    Abstract: An improved monolithic drug delivery dosage form releases a pharmaceutically active agent at a predetermined rate. The dosage form comprises a salted-out or crosslinked polymer and a pharmaceutically active agent. The salted-out or crosslinked polymer functions to polymerically entangle the pharmaceutically active agent but, progressively relaxes on contact with an aqueous medium in use to release the pharmaceutically active agent at a predetermined rate.
    Type: Application
    Filed: October 18, 2013
    Publication date: May 29, 2014
    Applicant: University of the Witwatersrand, Johannesburg
    Inventors: Sibongile Ruth Sibambo, Viness Pillay, Yahya Essop Choonara
  • Patent number: 8709712
    Abstract: This invention describes a method for identifying bacteria. In particular, this invention relates to a method for identifying and quantifying mycobacteria from a sputum sample taken from a subject using flow cytometry. Further described is the use of flow cytometry to identify and quantify Mycobacterium tuberculosis from sputum-derived samples. Once identified and quantified, the samples are spotted onto filter cards for use in verification of an existing method of diagnosis, calibration of an existing method of diagnosis and/or the establishment of an external quality control system for use in conjunction with these methods of diagnosis. In one embodiment the method is used to diagnose tuberculosis (TB).
    Type: Grant
    Filed: May 6, 2011
    Date of Patent: April 29, 2014
    Assignee: University of Witwatersrand, Johannesburg
    Inventor: Lesley Erica Scott
  • Patent number: 8691881
    Abstract: This invention relates to a process for the conversion of carbon containing feedstock to a liquid chemical product, particularly a liquid fuel product, wherein carbon dioxide emissions are minimized.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: April 8, 2014
    Assignee: University of the Witwatersrand
    Inventor: Shehzaad Kauchali
  • Publication number: 20140005269
    Abstract: A pharmaceutical dosage form for the release of at least one pharmaceutically active ingredient is claimed. The pharmaceutical dosage form includes a polymer matrix, polymer-lipid nanoparticles incorporated within the matrix and the pharmaceutically active ingredient(s). The polymer matrix is formed from at least two crosslinked cationic and anionic polymers, such as Eudragit® E100 and sodium carboxymethlycellulose. It can also include a neutral polymer, such as one derived from locust bean. The polymer-lipid nanoparticles are formed from at least one polymer, such as Eudragit® E100 and/or chitosan, and at least one phospholipid, such as lecithin. The polymer(s) and phospholipid are crosslinking with a chelating agent, such as sodium tripolyphosphate. The active ingredient or ingredients can be any pharmaceutically active compound(s), and in particular poorly absorbed compounds such as levodopa for the treatment of Parkinson's disease.
    Type: Application
    Filed: November 28, 2011
    Publication date: January 2, 2014
    Applicant: University of the Witwatersrand, Johannesburg
    Inventors: Ndidi Ngwuluka, Viness Pillay, Yahya Essop Choonara, Lisa Claire Du Toit
  • Publication number: 20140004185
    Abstract: A pharmaceutical composition for intraperitoneal delivery of an anti-neoplastic agent is provided for treating cancers associated with aberrant mucin expression, preferably ovarian cancer and pancreatic, prostate, metastatic breast, bladder and lung cancers. The composition comprises nanomicelles loaded with the anti-neoplastic agent, and antibodies such as anti-MUC16, anti-MUC1 or anti-MUC4 are conjugated to these nanomicelles. The antibody-bound nanomicelles are optionally embedded in a biodegradable pH- and thermo-responsive hydrogel capable of sol-gel transition at body temperature. The pharmaceutical composition is implantable in the peritoneum, where it transforms into a semi-solid gel at the body's core temperature. In response to pH, the hydrogel swells and releases the antibody-bound nanomicelles. The nanomicelles specifically target mucin antigens on cancer cells.
    Type: Application
    Filed: November 28, 2011
    Publication date: January 2, 2014
    Applicant: UNIVERSITY OF THE WITWATERSRAND, JOHANNESBURG
    Inventors: Nthato Chirwa, Viness Pillay, Yahya Essop Choonara, Pradeep Kumar, Lisa Claire Du Toit
  • Publication number: 20130337022
    Abstract: A pH responsive and mucoadhesive pharmaceutical dosage form for the release of a pharmaceutically active agent is described. The dosage form includes a mucoadhesive layer for site-specific mucoadhesion, a water-insoluble outer layer, and an intermediate layer including one or more pharmaceutically active agents for site-specific delivery. The different membranous layers perform different functions in order to create a drug delivery system which is able to deliver a drug to a specific site, for a particular period of time and with a specific drug release pattern. The dosage form can have two or more intermediate layers, each layer comprising an active agent. The mucoadhesive layer can also include an active agents. The dosage form is preferably an oral or buccal delivery form for release of the active agent into the gastro intestinal tract. The intermediate layer can be an electrospun fibrous membrane layer containing the active agent.
    Type: Application
    Filed: November 28, 2011
    Publication date: December 19, 2013
    Applicant: UNIVERSITY OF THE WITWATERSRAND, JOHANNESBURG
    Inventors: Viness Pillay, Rubina Perveen Shaikh, Yahya Essop Choonara, Lisa Claire Du Toit
  • Publication number: 20130338569
    Abstract: A polymeric hydrogel composition is described for the delivery of a pharmaceutically active agent when an electrical stimulus is applied to the composition. The composition comprises a polymer which forms the hydrogel, such as poly vinyl alcohol (PVA) cross-linked with diethyl acetamidomalonate (DAA), an electroactive polymer such as polyaniline and a pharmaceutically active agent such as an analgesic, and in particular, indomethacin. The composition can be subcutaneously implanted at a targeted site and under normal conditions, the active agent will be entrapped in the hydrogel itself. However, upon the application of an electric current to the hydrogel, the active agent will be released. When the electric current is removed, the change is reversed and the active agent will cease to be released. In one embodiment of the invention, the hydrogel composition is for use in alleviating chronic pain.
    Type: Application
    Filed: November 28, 2011
    Publication date: December 19, 2013
    Applicant: UNIVERSITY OF WITWATERSRAND, JOHANNESBURG
    Inventors: Thomas Tsai, Viness Pillay, Yahya Essop Choonara, Lisa Claire Du Toit
  • Publication number: 20130252916
    Abstract: This invention relates to an oramucosal pharmaceutical dosage form in the form of a wafer. The wafer comprises a porous, hydroscopic, muco-adhesive polymeric matrix with at least one desired pharmaceutically active compound added thereto. The polymer is selected from a number of polymers having different dissolution rates and, in use when taken orally, the matrix adheres to an oramucosal surface to dissolve over a predetermined period of time to release the pharmaceutically active compound. The invention also extends to a method of manufacturing an oramucosal pharmaceutical dosage form in the form of a wafer which involves freeze drying or lyophilisation.
    Type: Application
    Filed: January 8, 2013
    Publication date: September 26, 2013
    Applicant: UNIVERSITY OF THE WITWATERSRAND, JOHANNESBURG
    Inventor: UNIVERSITY OF THE WITWATERSRAND, JOHANNESBURG