Patents by Inventor David Aston

David Aston 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: 11078012
    Abstract: A cap with refill capability and the ability to track various aspects of the tote, cap, and equipment has been developed for use on chemical totes. It provides the ability to refill the tote without removing the cap and remove water from the fluid and air in the hose.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: August 3, 2021
    Assignee: NCH Corporation
    Inventor: Matthew David Aston
  • Publication number: 20180319587
    Abstract: A cap with refill capability and the ability to track various aspects of the tote, cap, and equipment has been developed for use on chemical totes. It provides the ability to refill the tote without removing the cap and remove water from the fluid and air in the hose.
    Type: Application
    Filed: July 29, 2016
    Publication date: November 8, 2018
    Applicant: NCH Corporation
    Inventor: Matthew David Aston
  • Publication number: 20120159888
    Abstract: Embodiments of the present disclosure generally provide unitary building units having a cultured stone face and the method and apparatus for making such building units.
    Type: Application
    Filed: December 9, 2010
    Publication date: June 28, 2012
    Inventor: David Aston
  • Publication number: 20060000568
    Abstract: A papermaking furnish is provided with a phenolic resin/polyethylene oxide retention system in combination with a solventless cationic polymer retention aid which increases retention rate and drainage in the paper sheet. The retention aid may be added to the furnish together with the phenolic resin or separately from it at a different point of addition. It can also be used for pretreating a filler which is added to the furnish.
    Type: Application
    Filed: September 16, 2003
    Publication date: January 5, 2006
    Inventors: Marco Polverari, Joseph Vu, David Aston
  • Patent number: 6923873
    Abstract: This invention concerns paint stripping compositions which are particularly suitable for stripping paint off aircraft. The basic composition consists of a mixture of specific amounts of the following substances: aromatic hydrocarbons, dimethyl formamide; N-methylpyrrolidone; benzyl alcohol; alkanolamine; wax; wetting agent; and thickening agent. A modified composition may also contain dimethyl sulfoxide and a terpene solvent. The invention also includes the method of stripping paint from an aircraft by applying the new stripping composition onto the surface of the aircraft allowing the paint to soften and loosen under the action of the composition, or to penetrate under the paint coating, and then gently removing both the loosened paint and the stripping composition from the aircraft surface without damaging the surface.
    Type: Grant
    Filed: January 18, 2002
    Date of Patent: August 2, 2005
    Assignee: Greensolv Environmental Products Inc.
    Inventors: Daniel Pageau, Elizabeth Marcu, David Aston
  • Publication number: 20040138077
    Abstract: This invention concerns paint stripping compositions which are particularly suitable for stripping paint off aircraft. The basic composition consists of a mixture of specific amounts of the following substances: aromatic hydrocarbons, dimethyl formamide; N-methylpyrrolidone; benzyl alcohol; alkanolamine; wax; wetting agent; and thickening agent. A modified composition may also contain dimethyl sulfoxide and a terpene solvent. The invention also includes the method of stripping paint from an aircraft by applying the new stripping composition onto the surface of the aircraft allowing the paint to soften and loosen under the action of the composition, or to penetrate under the paint coating, and then gently removing both the loosened paint and the stripping composition from the aircraft surface without damaging the surface.
    Type: Application
    Filed: February 25, 2004
    Publication date: July 15, 2004
    Inventors: Daniel Pageau, Elizabeth Marcu, David Aston
  • Patent number: 5246548
    Abstract: A method for the control of pitch in paper making machine dryer fabrics or equipment which are not in continuous contact with process water comprising applying to the fabrics or equipment, a water-soluble or water-dispersible cationic polymer and a water-soluble or water dispersible anionic aromatic polymer.
    Type: Grant
    Filed: October 28, 1992
    Date of Patent: September 21, 1993
    Assignee: Dearborn Chemical Company Limited
    Inventors: David A. Aston, John K. Hochu
  • Patent number: 4995944
    Abstract: A method is disclosed for treating papermill felts to inhibit the deposit of sticky material thereon. The method comprises applying an aqueous solution which contains at least about 2 ppm of a cationic polymer; which contains a water soluble cationic surfactant; the surfactant being applied in an amount effective to inhibit build-up of deposits derived from the cationic polymer. Cationic surfactants are preferred. Particular use is disclosed of water soluble surfactants which have a molecular weight between about 200 and 800 and having the general formula: ##STR1## wherein each R is independently selected from the group consisting of hydrogen, polyethylene oxide groups, polypropylene oxide groups, alkyl groups having between about 1 and 22 carbon atoms, aryl groups, and aralkyl groups, at least one of said R groups being an alkyl group having at least about 8 carbon atoms, and wherein X.sup.- is an anion, or 1/n of an n-valent anion.
    Type: Grant
    Filed: August 9, 1990
    Date of Patent: February 26, 1991
    Assignee: Dearborn Chemical Company Ltd.
    Inventors: David A. Aston, Stewart N. Paul
  • Patent number: 4810405
    Abstract: Iron oxide deposits are removed from substrates by use of aqueous solution at approximately neutral pH containing a phosphonate (e.g., hydroxyethylidene diphosphonic acid), a reducing agent (e.g., sodium sulfite), and a corrosion inhibitor (e.g., benzotriazole). Optionally, a surfactant and dispersant may be included.
    Type: Grant
    Filed: October 21, 1987
    Date of Patent: March 7, 1989
    Assignee: Dearborn Chemical Company, Limited
    Inventors: John E. Waller, John A. Gray, David A. Aston