Patents by Inventor Leo E. Nagan

Leo E. Nagan 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).

  • Method of water treatment using zeolite crystalloid coagulants
    Patent number: 6190561
    Abstract: A method of coagulating particulates, as in papermaking or water clarification applications, for example, is provided wherein a zeolite crystalloid coagulant is added to water containing the solid matter, a source of multivalent cations, and a cationic acrylamide polymer. The zeolite crystalloid coagulant is preferably prepared by admixing aqueous sodium silicate and sodium aluminate solutions to form a reaction mixture and allowing a reaction to proceed for a sufficient time to form a zeolite crystalloid coagulant particles having particle sizes of at least about 4 nm before terminating the reaction.
    Type: Grant
    Filed: February 17, 1998
    Date of Patent: February 20, 2001
    Assignee: Sortwell & Co., part interest
    Inventor: Leo E. Nagan
  • Method of making paper
    Patent number: 6183600
    Abstract: A method of coagulating particulates, as in papermaking or water clarification applications, for example, is provided wherein a zeolite crystalloid coagulant is added to water containing the solid matter, a source of multivalent cations, and a cationic acrylamide polymer. The zeolite crystalloid coagulant is preferably prepared by admixing aqueous sodium silicate and sodium aluminate solutions to form a reaction mixture and allowing a reaction to proceed for a sufficient time to form a zeolite crystalloid coagulant particles having particle sizes of at least about 4 nm before terminating the reaction.
    Type: Grant
    Filed: February 5, 1999
    Date of Patent: February 6, 2001
    Assignee: Sortwell & Co.
    Inventor: Leo E. Nagan
  • Method of making paper
    Patent number: 5900116
    Abstract: A method of coagulating particulates, as in papermaking or water clarification applications, for example, is provided wherein a zeolite crystalloid coagulant is added to water containing the solid matter, a source of multivalent cations, and a cationic acrylamide polymer. The zeolite crystalloid coagulant is preferably prepared by admixing aqueous sodium silicate and sodium aluminate solutions to form a reaction mixture and allowing a reaction to proceed for a sufficient time to form a zeolite crystalloid coagulant particles having particle sizes of at least about 4 nm before terminating the reaction.
    Type: Grant
    Filed: May 19, 1997
    Date of Patent: May 4, 1999
    Assignee: Sortwell & Co.
    Inventor: Leo E. Nagan
  • Method of water treatment using polyacrylamide-phosphonate flocculants
    Patent number: 5393436
    Abstract: A method of treating an aqueous system is disclosed. The method may be used to treat sewage streams as well as aqueous streams in pulp and paper mill processing. The method includes the steps of adding a polymeric composition to an aqueous stream. The composition is an anionically modified acrylamide polymer in an aqueous medium. The polymer is formed by reacting an acrylamide polymer with phosphorous acid, and has at least 5 mole percent phosphonate groups based on the acrylamide content of the polymer, and has a molecular weight of at least about 40,000. the pH of the composition is adjusted to at least about 7.7.
    Type: Grant
    Filed: June 6, 1994
    Date of Patent: February 28, 1995
    Assignee: Diatec Polymers
    Inventor: Leo E. Nagan
  • Polyacrylamide-phosphonate flocculants and methods of making
    Patent number: 5342539
    Abstract: Artionic water treatment polymers are obtained by reacting polyacrylamide and phosphorous acid.
    Type: Grant
    Filed: February 8, 1993
    Date of Patent: August 30, 1994
    Assignee: Diatec Polymers
    Inventor: Leo E. Nagan