Patents by Inventor Peter M. Robinson

Peter M. Robinson 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 for preparing an alkaline earth metal tallate
    Patent number: 6069119
    Abstract: A stable, fluid alkaline earth metal tallate dispersion is prepared by (i) forming a pre-emulsion of fatty acids derived from tall oil, water, and a surfactant; (ii) forming an alkaline earth metal salt dispersion from an alkaline earth metal oxide and/or hydroxide, a lower carboxylic acid, and water; and (iii) incorporating the pre-emulsion into the alkaline earth metal salt dispersion under high shear and low pressure.
    Type: Grant
    Filed: February 17, 1998
    Date of Patent: May 30, 2000
    Assignee: High Point Chemical Corp.
    Inventors: Peter M. Robinson, Robert E. Brooks, Terry E. Singleton
  • Method of preparing an alkaline earth metal tallate
    Patent number: 5763373
    Abstract: A stable, fluid alkaline earth metal tallate dispersion is prepared by (i) forming a pre-emulsion of fatty acids derived from tall oil, water, and a surfactant; (ii) forming an alkaline earth metal salt dispersion from an alkaline earth metal oxide and/or hydroxide, a lower carboxylic acid, and water; and (iii) incorporating the pre-emulsion into the alkaline earth metal salt dispersion under high shear and low pressure.
    Type: Grant
    Filed: June 20, 1996
    Date of Patent: June 9, 1998
    Assignee: High Point Chemical Corp.
    Inventors: Peter M. Robinson, Robert E. Brooks, Terry E. Singleton
  • Method of removing hydrophilic ink
    Patent number: 5415733
    Abstract: The removal of inks, particularly hydrophilic flexographic inks, from a pulp fiber slurry is accomplished by use of a combination of (a) a non-ionic surfactant; (b) a fatty acid or salt thereof; and (c) a water-soluble cationic polymer having a molecular weight less than about 1,000,000 daltons, particularly a polymer derived from the reaction of epichlorohydrin and at least one diamine or the polymerization of aziridine.
    Type: Grant
    Filed: May 27, 1993
    Date of Patent: May 16, 1995
    Assignee: High Point Chemical Corp.
    Inventors: Peter M. Robinson, Stephen P. Williams, Thomas F. Skaar, Hideaki Urushibata
  • Improved method of dewatering sludge
    Patent number: 5354480
    Abstract: The dewatering of sludge is improved by utilizing a water-soluble cationic copolymer in the aqueous phase of a water-in-oil emulsion wherein the copolymer has been prepared by (i) preparing an aqueous solution of a non-ionic monomer and a portion of the cationic monomer, (ii) emulsifying the aqueous solution in a hydro-carbon oil to form a water-in-oil emulsion, (iii) adding the balance of the total intended cationic monomer to the emulsion while substantially no polymerization is occurring, and (iv) polymerizing the monomers.
    Type: Grant
    Filed: February 18, 1992
    Date of Patent: October 11, 1994
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Peter M. Robinson, Nguyen Van-Det
  • Freeze-thaw stable polyacrylamide emulsions
    Patent number: 5200448
    Abstract: Water-in oil emulsions of water-soluble polymers, i.e. polyacrylamides, are stabilized against repeated freeze-thaw cycles by incorporating specific polymeric surfactants while maintaining the total amount of the primary surfactant at less than about 2 percent.
    Type: Grant
    Filed: March 27, 1992
    Date of Patent: April 6, 1993
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Peter M. Robinson, Martin R. Jenkins
  • AMPS copolymer emulsions with improved stability
    Patent number: 5185395
    Abstract: Copolymer water-in-oil emulsions of 2-acrylamido-2-methylpropane sulphonic acid (AMPS) monomer and an anionic comonomer such as methacrylic acid are prepared with substantially less coagulum formation by means of a specific dual surfactant system. The resultant emulsions have enhanced long-term storage stability.
    Type: Grant
    Filed: March 27, 1991
    Date of Patent: February 9, 1993
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Peter M. Robinson, Nguyen Van-Det
  • Cationic monomer delayed addition process
    Patent number: 5110864
    Abstract: Water-in-oil emulsions of cationic water-soluble copolymers which are prepared by incorporating only a portion of the cationic monomer in the aqueous phase prior to forming the water-in-oil emulsion in which polymerization will occur, forming the emulsion, adding the balance of the cationic monomer such that essentially no polymerization occurs immediately after the addition, and polymerizing the monomers. Copolymers prepared by this process show improved performance over conventionally prepared cationic copolymers.
    Type: Grant
    Filed: August 19, 1991
    Date of Patent: May 5, 1992
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Peter M. Robinson, Nguyen Van-Det
  • Freeze-thaw stable polyacrylamide emulsions
    Patent number: 5110853
    Abstract: Water-in-oil emulsions of water-soluble polymers, i.e. polyacrylamides, which are subject to freeze-thaw degradation are stabilized against repeated freeze-thaw cycles by incorporating specific ethoxylated alkylphenol surfactants containing low levels of ethoxylation. Moreover, the resultant emulsions exhibit superior resistance to sheet gel formation under ambient storage conditions.
    Type: Grant
    Filed: August 27, 1990
    Date of Patent: May 5, 1992
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Nguyen Van-Det, Peter M. Robinson
  • Stabilized Mannich emulsions
    Patent number: 5109062
    Abstract: A Mannich emulsion containing a stabilizing amount of a guanidine salt has been found to exhibit substantially increased long term stability, even at elevated temperature.
    Type: Grant
    Filed: November 15, 1990
    Date of Patent: April 28, 1992
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Peter M. Robinson, K. T. Chang, Nguyen Van-Det
  • Cationic monomer delayed addition process
    Patent number: 5081182
    Abstract: Water-in-oil emulsions of cationic water-soluble copolymers which are prepared by incorporating only a portion of the cationic monomer in the aqueous phase prior to forming the water-in-oil emulsion in which polymerization will occur, forming the emulsion, adding the balance of the cationic monomer such that essentially no polymerization occurs immediately after the addition, and polymerizing the monomers. Copolymers prepared by this process show improved performance over conventionally prepared cationic copolymers.
    Type: Grant
    Filed: March 5, 1990
    Date of Patent: January 14, 1992
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Peter M. Robinson, Nguyen Van-Det
  • Cationic polymers
    Patent number: 5006263
    Abstract: An improved cationic water-soluble polymer is prepared from acrylamide, a cationic monomer such as dimethylaminoethyl methacrylate dimethylsulfate quaternary, and a waste stream which is produced as a result of the transesterification reaction between dialkylamino alcohols and acrylates which is used to prepare the cationic monomer. The polymers are especially useful in dewatering applications.
    Type: Grant
    Filed: September 7, 1990
    Date of Patent: April 9, 1991
    Assignee: Exxon Chemical Patents, Inc.
    Inventors: Peter M. Robinson, Nguyen Van Det
  • Cationic polymers
    Patent number: 4983698
    Abstract: An improved cationic water-soluble polymer is prepared from acrylamide, a cationic monomer such as dimethylaminoethyl methacrylate dimethylsulfate quaternary, and a waste stream which is produced as a result of the transesterification reaction between dialkylamino alcohols and acrylates which is used to prepare the cationic monomer. The polymers are especially useful in dewatering applications.
    Type: Grant
    Filed: November 30, 1988
    Date of Patent: January 8, 1991
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Peter M. Robinson, Nguyen Van-Det
  • Freeze-thaw stable polyacrylamide emulsions
    Patent number: 4845138
    Abstract: Water-in-oil emulsions of water-soluble polymers, i.e. polyacrylamides, which are subject to freeze-thaw degradation are stabilized against repeated freeze-thaw cycles by incorporating specific substituted succinic anhydrides.
    Type: Grant
    Filed: April 15, 1988
    Date of Patent: July 4, 1989
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Peter M. Robinson, Philip D. Raby, Nguyen Van-Det
  • Freeze-thaw stable polyacrylamide emulsions
    Patent number: 4785036
    Abstract: Water-in-oil emulsions of water-soluble polymers, i.e. polyacrylamides, which are subject to freeze-thaw degradation are stabilized against repeated freeze-thaw cycles by incorporating specific substituted succinic anhydrides.
    Type: Grant
    Filed: May 27, 1987
    Date of Patent: November 15, 1988
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Peter M. Robinson, Philip D. Raby, Nguyen Van-Det
  • Bi-phase initiator system for water-in-oil emulsion polymers
    Patent number: 4739008
    Abstract: Water-in-oil emulsions of monomers which form water-soluble polymers are polymerized in the presence of a biphase initiator system containing both an oil-soluble initiator and a water-soluble initiator or activator or alternatively a water-soluble initiator and an oil-soluble activator which results in polymers having improved performance characteristics. In addition, the system permits the satisfactory polymerization of monomers which could not have been reproducibly polymerized.
    Type: Grant
    Filed: November 18, 1986
    Date of Patent: April 19, 1988
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Peter M. Robinson, Nguyen Van-Det
  • High concentration water-soluble polymers in water-in-oil emulsions
    Patent number: 4339371
    Abstract: Water-in-oil emulsions containing high concentrations of water-soluble polymers are prepared by incorporating therein an oil-soluble, water-insoluble polymeric surfactant prepared from maleic anhydride and a comonomer.
    Type: Grant
    Filed: March 20, 1981
    Date of Patent: July 13, 1982
    Assignee: American Cyanamid Company
    Inventors: Peter M. Robinson, David H. Rakowitz, Lesley J. Nowakowski
  • Granulation and drying aids for polymeric gels
    Patent number: 4339373
    Abstract: Polymeric soaps prepared from copolymers of hydrophobic monomers and hydrophilic monomers are useful as granulation and/or drying aids for polymeric gels, especially those gels of polyacrylamide.
    Type: Grant
    Filed: February 6, 1980
    Date of Patent: July 13, 1982
    Assignee: American Cyanamid Company
    Inventor: Peter M. Robinson
  • Aqueous free-radical polymerization using redox system initiator that avoids adverse effects of polymerization inhibiting cations
    Patent number: 4145495
    Abstract: Addition of a chelating agent and an chelatable inert cation species overcomes the inhibiting effects of impurity chelatable cation species present in an aqueous polymerization medium containing a redox system comprising an oxidizing agent and a chelatable metal reducing agent.
    Type: Grant
    Filed: May 24, 1978
    Date of Patent: March 20, 1979
    Assignee: American Cyanamid Company
    Inventors: Peter M. Robinson, Michael W. C. Coville, Robin W. Dexter