Patents by Inventor Mary A. Walker

Mary A. Walker 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: 8468716
    Abstract: A system for drying structures including an enclosed housing with a plurality of outlet openings, a plurality of flexible outlet hoses each connected to a respective outlet opening, and a vacuum motor engaged with the housing such that an outlet of the vacuum motor is exhausted into an interior of the housing so as to pressurize the interior of the housing such that compressed air is directed through the plurality of outlet hoses. Also a method of drying an interior of a structure, including placing a pressurized drying system adjacent a region of a structure, forming a plurality of openings in surfaces of the structure where the surfaces define enclosed spaces, inserting distal ends of outlet hoses of the pressurized drying system into respective openings of the surfaces of the structure, and engaging the pressurized drying system so as to generate a flow of pressurized air and to direct the pressurized air into the enclosed spaces.
    Type: Grant
    Filed: October 23, 2008
    Date of Patent: June 25, 2013
    Inventors: Mary A. Walker, Mark S. Walker
  • Patent number: 4863975
    Abstract: In a process for producing polyurethane foam by allowing a reaction mixture comprising at least one polyisocyanate component and at least one polyfunctional active hydrogen component to react, a compound selected from the group consisting of oxynitrate salts of metals of Group IV B of the Mendeleef periodic table, is employed as a cell opening additive. Such oxynitrate salts are also effective to modify tin tolerance of urethane formulations. The oxynitrate compounds are effective in both free rise and molded foam processes. Cell opening is accomplished, for instance, by reacting toluene diisocyanate with a polypropoxy/polyethoxy polyol in the presence of an oxynitrate salt of a Group IV B metal, such as zirconium oxynitrate, to form a foam having more open cells than a similar foam without oxynitrate.
    Type: Grant
    Filed: February 10, 1989
    Date of Patent: September 5, 1989
    Assignee: The Dow Chemical Company
    Inventors: Thomas M. Knobel, Mary A. Walker
  • Patent number: 4826883
    Abstract: In a process for producing polyurethane foam by allowing a reaction mixture comprising at least one polyisocyanate component and at least one polyfunctional active hydrogen component to react, a compound selected from the group consisting of oxynitrate salts of metals of Group IV B of the Mendeleef periodic table, is employed as a cell opening additive. Such oxynitrate salts are also effective to modify tin tolerance of urethane formulations. The oxynitrate compounds are effective in both free rise and molded foam processes. Cell opening is accomplished, for instance, by reacting toluene diisocyanate with a polypropoxy/polyethoxy polyol in the presence of an oxynitrate salt of a Group IV B metal, such as zirconium oxynitrate, to form a foam having more open cells than a similar foam without oxynitrate.
    Type: Grant
    Filed: September 29, 1988
    Date of Patent: May 2, 1989
    Assignee: The Dow Chemical Company
    Inventors: Thomas M. Knobel, Mary A. Walker
  • Patent number: 4814358
    Abstract: In a process for producing polyurethane foam by allowing a reaction mixture comprising at least one polyisocyanate component and at least one polyfunctional active hydrogen component to react, a compound selected from the group consisting of oxynitrate salts of metals of Group IV B of the Mendeleef periodic table, is employed as a cell opening additive. Such oxynitrate salts are also effective to modify tin tolerance of urethane formulations. The oxynitrate compounds are effective in both free rise and molded foam processes. Cell opening is accomplished, for instance, by reacting toluene diisocyanate with a polypropoxy/polyethoxy polyol in the presence of an oxynitrate salt of a Group IV B metal, such as zirconium oxynitrate, to form a foam having more open cells than a similar foam without oxynitrate.
    Type: Grant
    Filed: July 25, 1988
    Date of Patent: March 21, 1989
    Assignee: The Dow Chemical Company
    Inventors: Thomas M. Knobel, Mary A. Walker
  • Patent number: 4794127
    Abstract: In a process for producing polyurethane foam by allowing a reaction mixture comprising at least one polyisocyanate component and at least one polyfunctional active hydrogen component to react, a compound selected from the group consisting of oxynitrate salts of metals of Group IV B of the Mendeleef periodic table, is employed as a cell opening additive. Such oxynitrate salts are also effective to modify tin tolerance of urethane formulations. The oxynitrate compounds are effective in both free rise and molded foam processes. Cell opening is accomplished, for instance, by reacting toluene diisocyanate with a polypropoxy/polyethoxy polyol in the presence of an oxynitrate salt of a Group IV B metal, such as zirconium oxynitrate, to form a foam having more open cells than a similar foam without oxynitrate.
    Type: Grant
    Filed: March 11, 1988
    Date of Patent: December 27, 1988
    Assignee: The Dow Chemical Company
    Inventors: Thomas M. Knobel, Mary A. Walker
  • Patent number: 4618630
    Abstract: An antistatic additive for polymers, particularly polyurethanes is disclosed comprising an ionizable metal salt and an enhancer comprising a non-ionizable salt or ester of an organic acid.
    Type: Grant
    Filed: July 2, 1985
    Date of Patent: October 21, 1986
    Assignee: The Dow Chemical Co.
    Inventors: Thomas M. Knobel, Earl E. Kennedy, Mary A. Walker
  • Patent number: 4617325
    Abstract: An antistatic agent for polymers, particularly polyurethanes is disclosed comprising an ionizable metal salt and an enhancer comprising a phosphate ester.
    Type: Grant
    Filed: July 2, 1985
    Date of Patent: October 14, 1986
    Assignee: The Dow Chemical Company
    Inventors: Thomas M. Knobel, Earl E. Kennedy, Mary A. Walker