Patents by Inventor Lawrence S. Wittenbrook

Lawrence S. Wittenbrook 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).

  • Polyethyleneamines as sulfite antioxidants
    Patent number: 4310438
    Abstract: A method for reducing the oxidation of sulfite to sulfate in a sulfite-containing aqueous medium is disclosed and comprises adding to the medium water-soluble polyethyleneamine having at least one secondary amine and two primary amines.
    Type: Grant
    Filed: March 30, 1979
    Date of Patent: January 12, 1982
    Assignee: Betz Laboratories, Inc.
    Inventors: Joe C. Steelhammer, Ian D. Morrison, Lawrence S. Wittenbrook
  • Dewatering composition
    Patent number: 4191655
    Abstract: The present invention relates to the drainage or dewatering of ore concentrates and more particularly to an improved method for dewatering as by filtration, to produce solids which have a desirably low moisture content and which are readily and easily handled by conventional methods of materials handling. The method employs the use of linear or branched alkyl ethoxylated alcohols as dewatering aids.
    Type: Grant
    Filed: July 7, 1977
    Date of Patent: March 4, 1980
    Assignee: Betz Laboratories, Inc.
    Inventors: John E. Quinn, Lawrence S. Wittenbrook, Charles E. Donegan
  • Dewatering ore concentrates with branched alkyl ethoxylated alcohol
    Patent number: 4156649
    Abstract: The present invention relates to the drainage or dewatering of ore concentrates and more particularly to an improved method for dewatering as by filtration, to produce solids which have a desirably low moisture content and which are readily and easily handled by conventional methods of materials handling. The method employs the use of linear or branched alkyl ethoxylated alcohols as dewatering aids.
    Type: Grant
    Filed: February 22, 1978
    Date of Patent: May 29, 1979
    Assignee: Betz Laboratories, Inc.
    Inventors: John E. Quinn, Lawrence S. Wittenbrook, Charles E. Donegan
  • Coated controlled-release product
    Patent number: 4082533
    Abstract: A coated product providing for the controlled release of an active constituent, such as a fertilizer, over a long period of time comprising a core of an active constituent and two water insoluble coatings. The first coating surrounding the core contains masonry cement, and the second coating preferably contains a blend of one or more thermoplastic polymers and a wax. The coated product provides an unusually long lasting fertilizer at relatively low cost.
    Type: Grant
    Filed: June 27, 1973
    Date of Patent: April 4, 1978
    Assignee: D. M. Scott & Sons Company
    Inventors: Lawrence S. Wittenbrook, Edwin L. Scheiderer
  • Herbicidal compositions containing para-substituted benzenesulfonylureas and salts thereof and methods of employing such compositions
    Patent number: 3942973
    Abstract: Benzenesulfonylureas of the formula: ##SPC1##Where R is methyl or ethyl, R.sub.1 is methyl or ethyl, and R.sub.2 is hydrogen, methyl, or ethyl and salts of those benzenesulfonylureas of formula I having the formula: ##SPC2##Where R, R.sub.1, and R.sub.2 are as aforesaid, and Z is an alkali metal, an alkaline earth metal, or ##EQU1## where R.sub.3, R.sub.4, and R.sub.5 are each hydrogen or a C.sub.1 -C.sub.4 alkyl; the use of compounds of formulas I and II; and compositions containing such compounds.
    Type: Grant
    Filed: May 13, 1974
    Date of Patent: March 9, 1976
    Assignee: The O. M. Scott & Sons Company
    Inventors: Lawrence S. Wittenbrook, Richard J. Timmons, Raymond D. Fleming