Patents Assigned to The University of Guyana
  • Water-ammonia refrigeration system using solar energy
    Patent number: 4023375
    Abstract: Various interrelated ammonia solution, ammonia vapor, and liquid ammonia circuits are provided whereas solar radiation energy is used to boil such solution and produce ammonia vapor which is circulated into low pressure deabsorbing boilers to produce cooling effects suitable for air conditioning and food preservation. The intensity of the solar radiation is used to control alternative modes of operation.
    Type: Grant
    Filed: March 14, 1975
    Date of Patent: May 17, 1977
    Assignee: The University of Guyana
    Inventors: James C. V. Chinnappa, David D. Karran
  • Method of treating bauxite waste red mud with acid and making construction bricks from the treated material
    Patent number: 3985567
    Abstract: Bauxite waste red mud is treated with hydrochloric acid to dissolve only the sodium content. The treated material is mixed with kaolinitic clay and formed into construction bricks.
    Type: Grant
    Filed: September 18, 1974
    Date of Patent: October 12, 1976
    Assignee: University of Guyana
    Inventor: Gregory Onyemauwa Iwu