Patents by Inventor Frederick R. Mahn

Frederick R. Mahn 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).

  • Retention and/or drainage and/or dewatering aid
    Patent number: 4894119
    Abstract: A combination of a cationic polymer and a nonionic polymer are employed as a drainage and/or dewatering and/or retention aid. The combination has particular applicability to improving retention and/or drainage in the papermaking industry by addition of the combination to the pulp stock.
    Type: Grant
    Filed: April 10, 1985
    Date of Patent: January 16, 1990
    Assignee: Drew Chemical Corporation
    Inventors: Joseph J. Baron, Jr., Tamara Nowakowski, Thomas A. Farrington, Frederick R. Mahn
  • Synergistic microbiocidal compositions containing a mixture of a bicyclic polyoxymethylene oxazolidine and a 1,2-benzisothiazolin-3-one
    Patent number: 4725612
    Abstract: A synergistic microbiocidal composition for inhibiting bacterial growth comprising Component (1) having the formula: ##STR1## in which R represents hydrogen or a halogen atom, and alkali ammonium and amine salts thereof; and Component (2) having the formula: ##STR2## in which each R represents hydrogen, an alkyl of 1-6 carbons, phenyl, halophenyl or --(CH.sub.2 O).sub.m CH.sub.2 OH in which m is 0-2 and n is 0-4; Component 1/Component 2 being in a weight ratio of at least 1:1.
    Type: Grant
    Filed: July 20, 1987
    Date of Patent: February 16, 1988
    Assignee: Drew Chemical Corporation
    Inventors: Frederick R. Mahn, Lora J. Bogdany, Joseph J. Baron, Edward G. Knapick, Edward M. Antonucci
  • Synergistic microbiocidal compositions containing a mixture of a bicyclicpolyoxymethyleneoxazolidine and a 4-isothiazolin-3-one
    Patent number: 4725611
    Abstract: A synergistic microbiocidal composition comprising as Component (1) a 4-isothiazolin-3-one and as Component (2) a bicyclic polyoxymethyleneoxazolidine of the formula: ##STR1## in which each R represents hydrogen, an alkyl of 1-6 carbons, phenyl, halophenyl or --(CH.sub.2 O).sub.m CH.sub.2 OH in which m is 0-2 and n is 0-4; Component 1/Component 2 being in a weight ratio of at least 1:1.
    Type: Grant
    Filed: July 20, 1987
    Date of Patent: February 16, 1988
    Assignee: Drew Chemical Corporation
    Inventors: Frederick R. Mahn, Lora J. Bogdany, Joseph J. Baron, Edward G. Knapick, Edward M. Antonucci
  • Synergistic microbiocidal composition containing a mixture of a N-alkyldimethylbenzyl ammonium halide and a bicyclicpolyoxymethylene oxazolidine
    Patent number: 4725613
    Abstract: A synergistic microbiocide comprising a member selected from the group consisting of (1) an N-alkyl (C.sub.8 -C.sub.30) dimethylbenzylammonium halide and (2) a polycondensation product of acrolein/formaldehyde in a molar ratio of 1:10-10:1 in combination with (3) a bicyclic polyoxymethylene-oxaazolidine having the formula: ##STR1## in which each R represents hydrogen, an alkyl of 1-6 carbons, phenyl, halophenyl or --(CH.sub.2 O).sub.m CH.sub.2 OH in which m is 0-2 and n is 0-4, the ratio of (1) or (2) to (3) being 1:10-10:1 by weight.
    Type: Grant
    Filed: June 17, 1987
    Date of Patent: February 16, 1988
    Assignee: Drew Chemical Corporation
    Inventors: Frederick R. Mahn, Lora J. Bogdany, Joseph J. Baron, Edward G. Knapick, Edward M. Antonucci
  • Synergistic microbiocidal compositions containing a mixture of a N-alkyl dimethylbenzylammonium halide and an acrolein/formaldehyde polycondensation product
    Patent number: 4724142
    Abstract: A synergistic microbiocidal composition for inhibiting bacterial growth comprising as Component (1) a polycondensation product of acrolein/formaldehyde in a molar ratio of 1:1-10:1 and as Component (2) an N-alkyl(C.sub.8 -C.sub.30) dimethylbenzyl ammonium halide, Component (1) and Component (2) being in a weight ratio of about 1:10-10:1.
    Type: Grant
    Filed: July 20, 1987
    Date of Patent: February 9, 1988
    Assignee: Drew Chemical Corporation
    Inventors: Frederick R. Mahn, Lora J. Bogdany, Joseph J. Baron, Edward G. Knapick, Edward M. Antonucci
  • Synergistic microbiocidal composition containing a mixture of a bicyclic polyoxymethyleneoxazolidine and an acroloin/formaldehyde polycondensation product
    Patent number: 4724143
    Abstract: A synergistic microbiocide comprising a member selected from the group consisting of (1) an N-alkyl (C.sub.8 -C.sub.30) dimethylbenzylammonium halide and (2) a polycondensation product of acrolein/formaldehyde in a molar ratio of 1:10-10:1 in combination with (3) a bicyclic polyoxymethyleneoxaazolidine having the formula: ##STR1## in which each R represents hydrogen, an alkyl of 1-6 carbons, phenyl, halophenyl or --(CH.sub.2 O).sub.m CH.sub.2 OH in which m is 0-2 and n is 0-4, the ratio of (1) or (2) to (3) being 1:10-10:1 by weight.
    Type: Grant
    Filed: July 20, 1987
    Date of Patent: February 9, 1988
    Assignee: Drew Chemical Corporation
    Inventors: Frederick R. Mahn, Lora J. Bogdany, Joseph J. Baron, Edward G. Knapick, Edward M. Antonucci
  • Process for dispersing contaminants in circulating water or polar organic liquid system
    Patent number: 4010110
    Abstract: A dispersant composition comprising (1) a polysiloxane-polyoxyalkylene copolymer; and (2) an oxyalkylene polymer, in which the oxyalkylene of (1) and (2) is oxyethylene and/or oxypropylene. The composition disperses contaminants in aqueous systems without foaming, and also cleanses fouled surfaces.
    Type: Grant
    Filed: March 5, 1976
    Date of Patent: March 1, 1977
    Assignee: Drew Chemical Corporation
    Inventors: Joseph P. Cosentino, Frederick R. Mahn
  • Non-foaming dispersing composition
    Patent number: 3962119
    Abstract: A dispersant composition comprising (1) a polysiloxane-polyoxyalkylene copolymer; and (2) an oxyalkylene polymer, in which the oxyalkylene of (1) and (2) is oxyethylene and/or oxypropylene. The composition disperses contaminants in aqueous systems without foaming, and also cleanses fouled surfaces.
    Type: Grant
    Filed: August 6, 1971
    Date of Patent: June 8, 1976
    Assignee: Drew Chemical Corporation
    Inventors: Joseph P. Cosentino, Frederick R. Mahn
  • Non-foaming dispersing composition
    Patent number: 3959176
    Abstract: A solid non-foaming dispersing composition of (1) hydrophobic silica; (2) block copolymer of polyoxyethylene and polyoxypropylene wherein the chain is terminated, at both ends, by polyoxypropylene; and (3) an organic spreading liquid. A surfactant may also be employed. A tablet form of the composition is described.
    Type: Grant
    Filed: September 9, 1974
    Date of Patent: May 25, 1976
    Assignee: Drew Chemical Corporation
    Inventors: Frederick R. Mahn, Emil A. Ippolito