Patents by Inventor Darren F. Lawless

Darren F. Lawless 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).

  • Patent number: 9044703
    Abstract: There is provided a process for effecting permeation of at least an operative material component of an operative mixture from a higher pressure space, through a membrane, and into a lower pressure space, wherein the higher pressure space is disposed in mass transfer communication with the lower pressure space through the membrane.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: June 2, 2015
    Assignee: IMTEX MEMBRANES CORP.
    Inventors: Xianshe Feng, Darren F. Lawless
  • Patent number: 8974574
    Abstract: There is provided a process for effecting permeation of at least an operative material component of an operative mixture from a higher pressure space, through a membrane, and into a lower pressure space, wherein the higher pressure space is disposed in mass transfer communication with the lower pressure space through the membrane.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: March 10, 2015
    Assignee: Imtex Membranes Corp.
    Inventors: Xianshe Feng, Darren F. Lawless
  • Publication number: 20130213226
    Abstract: There is provided a process for effecting permeation of at least an operative material component of an operative mixture from a higher pressure space, through a membrane, and into a lower pressure space, wherein the higher pressure space is disposed in mass transfer communication with the lower pressure space through the membrane.
    Type: Application
    Filed: February 22, 2012
    Publication date: August 22, 2013
    Inventors: Xianshe Feng, Darren F. Lawless
  • Patent number: 5965004
    Abstract: Chlorine dioxide is generated by electrochemical oxidation of sodium chlorite in an anode compartment of a cation-exchange membrane-divided cell in the presence of significant quantities of sodium chlorate and is recovered in a suitable recipient medium by passing the chlorine dioxide through a hydrophobic microporous membrane. Water balance in a continuous operation is maintained by removing water from the anolyte by transporting the same partly across the hydrophobic microporous membrane in vapor form and partly across the cation-exchange membrane.
    Type: Grant
    Filed: October 28, 1997
    Date of Patent: October 12, 1999
    Assignee: Sterling Pulp Chemicals, Ltd.
    Inventors: Gerald Cowley, Marek Lipsztajn, George Joseph Ranger, Ron K. Schaible, Ty V. Tran, Darren F. Lawless
  • Patent number: 5127954
    Abstract: The corrosion inhibiting systems comprise at least one of the following: sodium fluorophosphate, and a water soluble salt of phosphonic acid derivatives having the general formula R.sub.n R.sub.1 N(CH.sub.2 PO.sub.3 H.sub.2).sub.2-n wherein R.sub.n and R.sub.1 are each independently selected from a member selected from the group consisting of alkyl, aminoalkyl and N-hydroxyalkyl and n is an integer selected from 1 and 0. The methods comprise laying on a surface a system as defined above. The invention also discloses deicers, paints and other corrosion inhibitors in numerous carriers. Products containing at least residual amounts of a system as defined above are also disclosed.
    Type: Grant
    Filed: December 4, 1990
    Date of Patent: July 7, 1992
    Assignee: Domtar Inc.
    Inventors: Allan Johnston, Dean Mason, Darren F. Lawless, Terrence E. Peel
  • Patent number: 5071579
    Abstract: The corrosion inhibiting systems comprise at least one of the following: sodium fluorophosphate, and a water soluble salt of phosphonic acid derivatives having the general formula R.sub.n R.sub.1 N(CH.sub.2 PO.sub.3 H.sub.2).sub.2-n wherein R.sub.n and R.sub.1 are each independently selected from a member selected from the group consisting of alkyl, aminoalkyl and N-hydroxyalkyl and n is an integer selected from 1 and 0. The methods comprise laying on a surface a system as defined above. The invention also discloses deicers, paints and other corrosion inhibitors in numerous carriers. Products containing at least residual amounts of a system as defined above are also disclosed.
    Type: Grant
    Filed: December 12, 1988
    Date of Patent: December 10, 1991
    Assignee: Domtar Inc.
    Inventors: Allan Johnston, Dean Mason, Darren F. Lawless, Terrence E. Peel