Patents by Inventor Sandra K. Richmann

Sandra K. Richmann 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).

  • Deinking wastepaper containing electrostatic printed ink using branched alcohol alkoxylate surfactant
    Patent number: 5885413
    Abstract: A process for the deinking of wastepaper is disclosed. The process comprises administering a sufficient amount of a branched alcohol alkoxylate surfactant to a sample of waste paper for which treatment is desired. The surfactant is effective for the flotation of the ink.
    Type: Grant
    Filed: November 15, 1996
    Date of Patent: March 23, 1999
    Assignee: BetzDearborn Inc.
    Inventors: Sandra K. Richmann, Frank J. Sutman
  • Process and composition for deinking dry toner electrostatic printed wastepaper
    Patent number: 5302242
    Abstract: A process and composition for deinking dry toner electrostatic printed wastepaper is disclosed. The composition comprises a combination of at least two of the following components: (a) aliphatic petroleum distillates, (b) an alkylphenoxypoly-(ethyleneoxy) ethanol and (c) an ethoxylated polyoxypropylene glycol.The process comprises administering a sufficient amount of the composition to a sample of electrostatic printed wastepaper for which treatment is desired.
    Type: Grant
    Filed: April 20, 1992
    Date of Patent: April 12, 1994
    Assignee: PaperChem Inc. Betz
    Inventors: Sandra K. Richmann, Mary Beth Letscher
  • Process and composition for deinking dry toner electrostatic printed wastepaper
    Patent number: 5282997
    Abstract: A composition and method for deinking dry toner electrostatic printed wastepaper is disclosed. The composition comprises a combination of: (1) aliphatic petroleum distillates, (2) an alkylphenoxypoly-(ethyleneoxy) ethanol, and (3) an ethoxylated polyoxypropylene glycol.The method comprises administering a sufficient amount of this combination to a sample of electrostatic printed wastepaper for which treatment is desired.
    Type: Grant
    Filed: June 5, 1992
    Date of Patent: February 1, 1994
    Assignee: Betz PaperChem, Inc.
    Inventors: Sandra K. Richmann, Mary Beth Letscher
  • Use of surfactants having an HLB less than 10 in the deinking of dry toner electrostatic printed wastepaper
    Patent number: 5248388
    Abstract: A method for deinking dry toner electrostatic printed wastepaper is disclosed. The method comprises administering a sufficient amount of a surfactant with a hydrophile/lipophile balance of from about 0.5 to 10.0 to a sample of electrostatic printed wastepaper for which treatment is desired.
    Type: Grant
    Filed: April 20, 1992
    Date of Patent: September 28, 1993
    Assignee: Betz PaperChem, Inc.
    Inventors: Sandra K. Richmann, Mary Beth Letscher
  • Use of surfactants having an HLB less than 10 in the deinking of dry toner electrostatic printed wastepaper
    Patent number: 5200034
    Abstract: A method for deinking dry toner electrostatic printed wastepaper is disclosed. The method includes administering a sufficient amount of an ethoxylated surfactant, propoxylated surfactant, esterified surfactant or alkanolamide surfactant having an HLB value of less than 10.0 to a sample of electrostatic printed wastepaper for which treatment is desired.
    Type: Grant
    Filed: April 25, 1991
    Date of Patent: April 6, 1993
    Assignee: Betz PaperChem, Inc.
    Inventors: Sandra K. Richmann, Mary B. Letscher