Patents by Inventor Abdul Malek

Abdul Malek 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).

  • Regenerative adsorption process and multi-reactor regenerative adsorption chiller
    Patent number: 6490875
    Abstract: A regenerative adsorption process and a multi-reactor regenerative adsorption chiller assembly including a condenser adapted to receive a coolant from a source; an evaporator connected to the condenser to provide a refrigerant circuit; a plurality of reactors, each being able to operate in adsorption and desorption modes and having a coolant inlet to directly or indirectly receive coolant when operating in adsorption mode before, after or simultaneous with the condenser, and a waste heat inlet for directly or indirectly receiving waste heat from a waste heat source when operating in desorption mode; and control means for controlling said plurality of reactors such that each reactor alternately operates in adsorption and desorption modes for substantially identical time intervals, and such that each reactor has an equal chance of being the first reactor to receive the coolant when operating in adsorption mode, and the waste heat from the waste heat source when operating in desorption mode.
    Type: Grant
    Filed: June 8, 2001
    Date of Patent: December 10, 2002
    Assignee: The National University of Singapore
    Inventors: Hui Tong Chua, Kim Choon Ng, Abdul Malek, Takao Kashiwagi, Atsushi Akisawa, Bidyut Baran Saha
  • Regenerative adsorption process and multi-reactor regenerative adsorption chiller
    Publication number: 20020053217
    Abstract: A regenerative adsorption process and a multi-reactor regenerative adsorption chiller assembly including a condenser adapted to receive a coolant from a source; an evaporator connected to the condenser to provide a refrigerant circuit; a plurality of reactors, each being able to operate in adsorption and desorption modes and having a coolant inlet to directly or indirectly receive coolant when operating in adsorption mode before, after or simultaneous with the condenser, and a waste heat inlet for directly or indirectly receiving waste heat from a waste heat source when operating in desorption mode; and control means for controlling said plurality of reactors such that each reactor alternately operates in adsorption and desorption modes for substantially identical time intervals, and such that each reactor has an equal chance of being the first reactor to receive the coolant when operating in adsorption mode, and the waste heat from the waste heat source when operating in desorption mode.
    Type: Application
    Filed: June 8, 2001
    Publication date: May 9, 2002
    Inventors: Hui Tong Chua, Kim Choon Ng, Abdul Malek, Takao Kashiwagi, Atsushi Akisawa, Bidyut Baran Saha
  • Method for ultra-trace level analysis of water
    Patent number: 5512491
    Abstract: A method for ultra-analysis of water for trace impurities. An effective trapping media functions by binding gels that carry ultratrace analytes on their surfaces.
    Type: Grant
    Filed: October 21, 1993
    Date of Patent: April 30, 1996
    Assignee: Areco Canada Inc.
    Inventors: K. Anwer Mehkeri, Abdul Malek, Bryan R. Hollebone, Xinqiang Zhou
  • Two step oxidation process for the production of carboxylic acids such as azelaic acid from unsaturated substrates
    Patent number: 5380928
    Abstract: The invention relates to a method for the high yield production of dicarboxylic acids such as azelaic acid by the controlled two step oxidation of an unsaturated hydrocarbon substrate. The method consists of two steps and involves the derivatization of the unsaturated substrate which locks and directs oxidative cleavage at the site of unsaturation to yield the desired acids.
    Type: Grant
    Filed: August 18, 1993
    Date of Patent: January 10, 1995
    Assignee: Synergistics Industries, Inc.
    Inventors: Abdul Malek, Clevys J. Monasterios, G. Ronald Brown, Ved P. Gupta