Patents by Inventor Robert H. Pelton

Robert H. Pelton 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).

  • Polymeric boronic acid derivatives and their use for papermaking
    Patent number: 7943713
    Abstract: Polymeric compounds of formula I comprising boronic acid are provided. These polymeric compounds are prepared either by grafting boronic acid containing compounds (e.g. 4-carboxyphenylboronic acid) to hydrolysed poly(N-vinylformamide) or hydrolysing copolymer(s) obtained by copolymerizing vinyl group containing boronic acid monomers (e.g. -vinylphenyl boronic acid) and N-vinylformamide. These polymeric compounds are used in increasing the wet strength of paper in paper-making processes. Formula (I).
    Type: Grant
    Filed: July 29, 2005
    Date of Patent: May 17, 2011
    Assignee: BASF Aktiengesellschaft
    Inventors: Robert H. Pelton, Chen Lu
  • Polymeric Boronic Acid Derivatives and Their use for Papermaking
    Publication number: 20080099172
    Abstract: Polymeric compounds of formula I comprising boronic acid are provided. These polymeric compounds are prepared either by grafting boronic acid containing compounds (e.g. 4-carboxyphenylboronic acid) to hydrolysed poly(N-vinylformamide) or hydrolysing copolymer(s) obtained by copolymerizing vinyl group containing boronic acid monomers (e.g. -vinylphenyl boronic acid) and N-vinylformamide. These polymeric compounds are used in increasing the wet strength of paper in paper-making processes. Formula (I).
    Type: Application
    Filed: July 29, 2005
    Publication date: May 1, 2008
    Inventors: Robert H. Pelton, Chen Lu
  • Clotting washing
    Patent number: 5310460
    Abstract: Brown stock washing of wood pulp is improved by adding a water-soluble cationic polymer to the wash water. The cationic polymer reacts with lignin solution present in the larger channels in the pulp mat to give a precipitate which lowers the flow rate of wash water through the larger channels. A more efficient wash water usage is obtained.
    Type: Grant
    Filed: June 25, 1993
    Date of Patent: May 10, 1994
    Inventors: Robert H. Pelton, Pei Li
  • Silicone antifoams
    Patent number: 5055229
    Abstract: A durable, effective foam suppressant composition produced through free-radical polymerization of mixtures of polydiorganosiloxanes, silica and a free radical polymerization initiator, and optionally, vinyl monomer(s) and pendant vinyl modified silicone oil, followed by dilution of the resulting reaction product with a low viscosity polysiloxane is disclosed. Also disclosed are methods for its production and use in suppressing foams in liquid mediums.
    Type: Grant
    Filed: January 3, 1989
    Date of Patent: October 8, 1991
    Assignee: Union Carbide Chemicals and Plastics Technology Corporation
    Inventors: Robert H. Pelton, Errol D. Goddard
  • Additives for increased retention and pitch control in paper manufacture
    Patent number: 4313790
    Abstract: A process is disclosed for the production of paper and paper-like products which consists of the addition to the papermaking furnish of kraft lignin or modified kraft lignin and poly(oxyethylene).
    Type: Grant
    Filed: March 31, 1980
    Date of Patent: February 2, 1982
    Assignee: Pulp and Paper Research Institute of Canada
    Inventors: Robert H. Pelton, Lawrence H. Allen, Henry M. Nugent