Patents by Inventor Joseph C. Fan

Joseph C. Fan 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 making graft copolymers from sodium poly(aspartate) and the resulting graft copolymer
    Patent number: 8202946
    Abstract: A variety of graft copolymers can be formed sodium poly(aspartate) with a wide variety of monomers in an aqueous medium by the use of grafting method in the presence of radical initiator at a temperature of from about five degrees Centigrade to about 100 degrees Centigrade. Graft copolymers at high conversion with molecular weight up to millions can be prepared using this method.
    Type: Grant
    Filed: May 2, 2011
    Date of Patent: June 19, 2012
    Assignee: NanoChem Solutions, Inc.
    Inventors: Damodar R. Patil, Laiduien G. Fan, Joseph C. Fan, Jiangping Yu
  • Method of making graft copolymers from sodium poly(aspartate) and the resulting graft copolymer
    Publication number: 20110213099
    Abstract: A variety of graft copolymers can be formed sodium poly(aspartate) with a wide variety of monomers in an aqueous medium by the use of grafting method in the presence of radical initiator at a temperature of from about five degrees Centigrade to about 100 degrees Centigrade. Graft copolymers at high conversion with molecular weight up to millions can be prepared using this method.
    Type: Application
    Filed: May 2, 2011
    Publication date: September 1, 2011
    Inventors: Damodar R. Patil, Laiduien G. Fan, Joseph C. Fan, Jiangping Yu
  • Method of making graft copolymers from sodium poly(aspartate) and the resulting graft copolymer
    Patent number: 7999040
    Abstract: A variety of graft copolymers can be formed sodium poly(aspartate) with a wide variety of monomers in an aqueous medium by the use of grafting method in the presence of radical initiator at a temperature of from about five degrees Centigrade to about 100 degrees Centigrade. Graft copolymers at high conversion with molecular weight up to millions can be prepared using this method.
    Type: Grant
    Filed: September 15, 2008
    Date of Patent: August 16, 2011
    Assignee: Nanochem Solutions, Inc.
    Inventors: Damodar R. Patil, Laiduien G. Fan, Joseph C. Fan, Jiangping Yu
  • METHOD OF MAKING GRAFT COPOLYMERS FROM SODIUM POLY(ASPARTATE) AND THE RESULTING GRAFT COPOLYMER
    Publication number: 20090326165
    Abstract: A variety of graft copolymers can be formed sodium poly(aspartate) with a wide variety of monomers in an aqueous medium by the use of grafting method in the presence of radical initiator at a temperature of from about five degrees Centigrade to about 100 degrees Centigrade. Graft copolymers at high conversion with molecular weight up to millions can be prepared using this method.
    Type: Application
    Filed: September 15, 2008
    Publication date: December 31, 2009
    Inventors: Damodar R. Patil, Laiduien G. Fan, Joseph C. Fan, Jiangping Yu
  • Composition for inhibition of metal corrosion
    Patent number: 6620338
    Abstract: Novel corrosion inhibiting compositions comprising a combination of amino thiol or amino disulfide compounds with acidic amino acid polymers inhibit carbon dioxide induced corrosion of ferrous metals in aqueous systems. Particularly effective inhibitor compositions are the natural amino acids cysteine and cystine and their decarboxylated analogues cysteamine and cystamine in combination with polyaspartic acid. The inhibitor compositions are particularly useful for preventing corrosion and scale formation in oil production applications.
    Type: Grant
    Filed: September 9, 2002
    Date of Patent: September 16, 2003
    Assignee: Donlar Corporation
    Inventors: Joseph C. Fan, Lai-Duien Grace Fan, Jacob Mazo
  • Composition for inhibition of metal corrosion
    Publication number: 20030060372
    Abstract: Novel corrosion inhibiting compositions comprising a combination of amino thiol or amino disulfide compounds with acidic amino acid polymers inhibit carbon dioxide induced corrosion of ferrous metals in aqueous systems. Particularly effective inhibitor compositions are the natural amino acids cysteine and cystine and their decarboxylated analogues cysteamine and cystamine in combination with polyaspartic acid. The inhibitor compositions are particularly useful for preventing corrosion and scale formation in oil production applications.
    Type: Application
    Filed: September 9, 2002
    Publication date: March 27, 2003
    Applicant: Donlar Corporation
    Inventors: Joseph C. Fan, Lai-Duien Grace Fan, Jacob Mazo
  • Composition and method for inhibition of metal corrosion
    Patent number: 6447717
    Abstract: Carbon dioxide induced corrosion of ferrous metals in aqueous systems is inhibited by treatment of the aqueous system with corrosion inhibiting amino thiol and amino disulfide compounds. Particularly effective inhibitors are the natural amino acids cysteine and cystine and their decarboxylated analogues cysteamine and cystamine. Novel corrosion inhibiting compositions comprising a combination of amino thiol or amino disulfide compounds with acidic amino acid polymers are also disclosed.
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: September 10, 2002
    Assignee: Donlar Corporation
    Inventors: Joseph C. Fan, Lai-Duien Grace Fan, Jacob Mazo
  • Inhibition of metal corrosion
    Patent number: 6277302
    Abstract: A composition and method is disclosed for inhibiting the corrosion of metals in contact with an aqueous system capable of corroding the metal. The inventive composition contains a substantially water-soluble polymer of an acidic amino acid and at least one water-soluble salt of molybdenum or zinc. The composition is substantially non-toxic and environmentally acceptable and is supplied in a corrosion-inhibition amount to the otherwise metal-corrosive aqueous system.
    Type: Grant
    Filed: October 21, 1998
    Date of Patent: August 21, 2001
    Assignee: Donlar Corporation
    Inventors: Lai-Duien Grace Fan, Joseph C. Fan
  • Method for inhibition of oxygen corrosion in aqueous systems by the use of a tannin activated oxygen scavenger
    Patent number: 5587109
    Abstract: A method of treating an aqueous system is described which comprises incorporating in the system a hydroxylamine derivative of the general formula: ##STR1## wherein each of R.sub.1, R.sub.2 and R.sub.3 which may be the same or different represents hydrogen, alkyl of 1 to 8 carbon atoms or aryl or a water soluble salt thereof or a precursor thereof, and a tannin in a weight ratio of at least 2:1. This is particularly useful for boiler water systems.
    Type: Grant
    Filed: April 19, 1995
    Date of Patent: December 24, 1996
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Brian Greaves, Stephen C. Poole, Chih M. Hwa, Joseph C. Fan
  • Method for inhibiting corrosion of metals using polytartaric acids
    Patent number: 5344590
    Abstract: A method for inhibiting corrosion of metals in contact with an aqueous solution comprising adding to the system a corrosion inhibiting amount of one or more polytartaric acid compounds having the generalized formula: ##STR1## wherein each R is independently selected from the group consisting of H and C.sub.1 to C.sub.4 alkyl, n is less than 4 and the average molecular weight of the mixture corresponds to an average n in the range 1.2 to 3.
    Type: Grant
    Filed: January 6, 1993
    Date of Patent: September 6, 1994
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Charles G. Carter, Lai-Duien G. Fan, Joseph C. Fan, Robert P. Kreh, Vladimir Jovancicevic