Patents by Inventor Herbert A. Lieberman

Herbert A. Lieberman 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).

  • Water soluble polymers having antifungal properties
    Patent number: 5209922
    Abstract: This invention relates to an antifungal block copolymer of poly(vinyl lactam) having the formula ##STR1## where m has a value of from 1 to 3 and from about 15 to about 25 wt. % of a quaternized amino alkyl acrylamide comonomer wherein the quaternizing anion is in part halide --O--CO(CH.sub.2).sub.s CH.dbd.CHZ wherein s has a value of from 4 to 14 and Z is hydrogen or a C.sub.1 to C.sub.4 alkyl radical, which copolymer is comprised of the following units ##STR2## wherein m has a value of from 1 to 3; p has a value of from 1 to 5; r has a value of from 2 to 6; each of X and Y is hydrogen or a C.sub.1 to C.sub.4 alkyl and each of R.sub.1, R.sub.2 and R.sub.3 is C.sub.1 to C.sub.4 alkyl. The invention also relates to the use of the above polymers as antifungal agents.
    Type: Grant
    Filed: March 19, 1992
    Date of Patent: May 11, 1993
    Assignee: ISP Investments Inc.
    Inventors: John J. Merianos, Herbert A. Lieberman, Paul Garelick
  • Toothpaste composition containing strontium salt of maleic anhydride-methyl vinyl ether copolymer
    Patent number: 5188818
    Abstract: A toothpaste composition is provided which includes the strontium salt of maleic anhydride-methyl vinyl ether copolymer. This ingredient is capable of desensitizing the nerve endings of a tooth in saliva or water because of an extension of the contact time of the strontium on the tooth surface.
    Type: Grant
    Filed: March 30, 1992
    Date of Patent: February 23, 1993
    Assignee: ISP Investments Inc.
    Inventors: John J. Merianos, Paul Garelick, Herbert A. Lieberman
  • Method for reducing the microbial content of surfaces with a microbiocidal, anhydrous complex of PVP-H.sub.2 O.sub.2
    Patent number: 5008106
    Abstract: What is provided herein is a method for reducing the microbial content of surfaces which comprises contacting said surface with a microbiocidal amount of a substantially anhydrous complex of PVP and H.sub.2 O.sub.2.
    Type: Grant
    Filed: December 14, 1989
    Date of Patent: April 16, 1991
    Assignee: GAF Chemicals Corporation
    Inventors: John J. Merianos, Herbert A. Lieberman, Robert B. Login