Patents by Inventor John A. Ripmeester

John A. Ripmeester 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).

  • Clathrate desalination process using an ultrasonic actuator
    Publication number: 20140223958
    Abstract: A freeze desalination process uses cyclopentane (“C5H10”) (14) as an agent for the formation of a gas hydrate as a clathrate (13). A crystallizer vessel (10) containing a mixture of seawater (11) and diffuse bubbles (18) of C5H10 is cooled to allow a gas hydrate phase to form. An ultrasonic transducer (21) located in the bubble stream encourages nucleation and thus clathrate formation.
    Type: Application
    Filed: September 26, 2012
    Publication date: August 14, 2014
    Inventors: Richard A. McCormack, John A. Ripmeester
  • Method of synthesizing colloidal nanocrystals
    Patent number: 7267810
    Abstract: A method of making nanocrystals involves adding a chalocogen source to a hot solution of a metal-containing non-organometallic compound, such as CdO, in a first ligand solvent, such as TOP, and preferably subsequently cooling the resulting mixture to a lower temperature to grow the nanocrystals at said lower temperature. The method can involve either one ligand or two-ligand systems.
    Type: Grant
    Filed: December 30, 2004
    Date of Patent: September 11, 2007
    Assignee: National Research Council of Canada
    Inventors: Kui Yu, John Ripmeester
  • Method of synthesizing colloidal nanocrystals
    Publication number: 20050238568
    Abstract: A method of making nanocrystals involves adding a chalocogen source to a hot solution of a metal-containing non-organometallic compound, such as CdO, in a first ligand solvent, such as TOP, and preferably subsequently cooling the resulting mixture to a lower temperature to grow the nanocrystals at said lower temperature. The method can involve either one ligand or two-ligand systems.
    Type: Application
    Filed: December 30, 2004
    Publication date: October 27, 2005
    Applicant: National Research Council of Canada
    Inventors: Kui Yu, John Ripmeester
  • Thermally programmable gas storage and release
    Publication number: 20050211091
    Abstract: The P21/n crystal form of p-tert-butylcalix(4)arene (tBC) can be used to adsorb a gas or to selectively adsorb a component from a gas mixture, e.g. carbon dioxide from a mixture of hydrocarbons and CO2. The adsorbed gas can be desorbed by heating the tBC/gas combination.
    Type: Application
    Filed: March 25, 2005
    Publication date: September 29, 2005
    Inventors: Igor Moudrakovski, Gary Enright, Kontantin Udachin, John Ripmeester
  • Antifreeze proteins for inhibition of clathrate hydrate formation and reformation
    Publication number: 20050161631
    Abstract: Antifreeze proteins, active fragments of these antifreeze proteins and mimetics thereof for use in inhibiting clathrate hydrate formation and reformation and designing and selecting inhibitors of clathrate hydrate formation and reformation are provided.
    Type: Application
    Filed: April 11, 2003
    Publication date: July 28, 2005
    Inventors: Virginia Walker, John Ripmeester, Huang Zeng
  • Inclusion complexes of cyclodextrins by agglomeration
    Patent number: 5070081
    Abstract: A combined process is described in which inclusion complexes are formed from guest molecules and cyclodextrins during agglomeration of the cyclodextrins. Sufficient agitation in the presence of a small amount of water results in complex formation and bonding into strong agglomerates. The agglomerates are strong and stable and useful inter alia in foods (the guest molecules are flavors), pharmaceuticals (the guest molecules are drugs) and agriculture (the guest molecules are various agrochemicals).
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: December 3, 1991
    Assignee: National Research Council of Canada
    Inventors: Abdul Majid, John A. Ripmeester