Patents by Inventor John Romberger

John Romberger 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: 5230833
    Abstract: A colloidal silica slurry comprising: a low metals ammonium-stabilized silica sol having the following characteristics: SiO.sub.2 present in the range between about 15 to about 50 weight percent; a pH in the range between about 8.5 to about 11.3; a particle diameter in the range between about 4.0 to about 130 nm; aluminum, as Al, present in an amount less than about 100 ppm, based on SiO.sub.2 ; iron, as Fe, present in an amount less than about 50 ppm, based on SiO.sub.2 ; potassium, as K, present in an amount less than about 25 ppm, based on SiO.sub.2 ; and sodium, as Na, present in an amount less than about 500 ppm, based on SiO.sub.2 ; and a bactericide, a polishing rate accelerator which differs from the bactericide, and/or a sodium chlorite or sodium hypochlorite biocide. Optionally, a fungicide may also be added to the colloidal silica slurry to inhibit fungi growth.
    Type: Grant
    Filed: August 19, 1992
    Date of Patent: July 27, 1993
    Assignee: Nalco Chemical Company
    Inventors: John A. Romberger, Charles C. Payne
  • Patent number: 4948464
    Abstract: An aqueous slurry of comprising a plurality of synthetic fibers and from 0.1-10 percent by weight based on the weight of the fibers of a water-soluble acrylamide polymer dispersant containg at least 5 percent by weight of 2-acrylamido-2-methylpropanesulfonic acid units, said polymer having an RSV of at least 10.
    Type: Grant
    Filed: September 5, 1989
    Date of Patent: August 14, 1990
    Assignee: Nalco Chemical Company
    Inventors: Paul F. Richardson, Suzanne N. Dunn, John A. Romberger
  • Patent number: 4931318
    Abstract: Colloidal silica prevents the interaction of cationic softeners and water-soluble polymers which are present in the manufacture of fiberglass mats.
    Type: Grant
    Filed: September 23, 1988
    Date of Patent: June 5, 1990
    Assignee: Nalco Chemical Company
    Inventors: John A. Romberger, Robert D. Jones, Richard P. Carr
  • Patent number: 4869932
    Abstract: A method of preventing the interaction of cationic softeners coated upon the surfaces of glass fibers with anionic polymers contained in aqueous baths used in forming the glass fibers into mats which comprises treating the fiber with at least 3 parts per million, of a water-soluble anionic vinyl polymer having a molecular weight range of from 500-50,000.
    Type: Grant
    Filed: September 12, 1988
    Date of Patent: September 26, 1989
    Assignee: Nalco Chemical Company
    Inventor: John A. Romberger
  • Patent number: 4771094
    Abstract: A stable aqueous slurry of particles which comprises:______________________________________ Ingredient % by weight ______________________________________ water 40-60 oil-in-water emulsion 10-30 acrylic acid polymer having a .1-1 MW greater than 1,000,000 suspended particles 2-50 ______________________________________ .
    Type: Grant
    Filed: June 3, 1987
    Date of Patent: September 13, 1988
    Assignee: Nalco Chemical Company
    Inventor: John A. Romberger
  • Patent number: 4572381
    Abstract: A bracket board is disclosed for supporting a bracket in which a base has disposed thereon a plurality of parallel horizontal facing panels. Each of the facing panels is separated from an adjacent facing panel by a horizontal groove. A reinforcing Z-section member is disposed in each of the horizontal grooves with the upper arm of each Z-section member being sandwiched between the base and an undercut on the lower edge of each facing panel.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: February 25, 1986
    Inventors: Fred B. Breakey, Leo D. Barber, Richard L. Chapman, Norman Godin, Robert Henry, Claude Jackson, John Romberger, Rudolph Seidl
  • Patent number: 4529572
    Abstract: Water soluble zinc copolymer complexes of acrylic acidethylacrylate copolymers are useful in preventing corrosion in aqueous recirculating systems.
    Type: Grant
    Filed: September 21, 1984
    Date of Patent: July 16, 1985
    Assignee: Nalco Chemical Company
    Inventors: John A. Romberger, Laura J. Blaser
  • Patent number: 4502978
    Abstract: A method of enhancing corrosion inhibition of inorganic corrosion inhibitors, particularly stabilized phosphate corrosion inhibitors, when used in high hardness waters containing at least 800 ppm total hardness which comprises adding to the high hardness waters a combined product which includes both the inorganic corrosion inhibitor system and an effective amount of a water-soluble acrylic acid:acrylamide copolymer having an acrylic acid:acrylamide weight ratio between 1:4 and 1:2 and having a molecular weight between 1,000-25,000.
    Type: Grant
    Filed: November 8, 1982
    Date of Patent: March 5, 1985
    Assignee: Nalco Chemical Company
    Inventors: John A. Romberger, Daniel A. Meier