Patents by Inventor Grace FAN

Grace 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).

  • Publication number: 20220411345
    Abstract: A compositions of new nitrification/volatilization inhibitor products that also contain a liquid solvent, a carboxylated polymer component, a nitrification inhibitor, and/or a volatilization inhibitor that is either uniformly applied to granular fertilizers (containing nitrogen or not containing nitrogen), or to a liquid fertilizer product in a tank. According to an aspect of the invention, there is provided a product comprising: from about 1-5 parts liquid solvent, from about 0.5-5 parts carboxylated polymer, from about 0.5-5 parts nitrification inhibitor, from 0.5-5 parts volatilization inhibitor, and optionally from about 0-5 parts sugar alcohol.
    Type: Application
    Filed: July 2, 2020
    Publication date: December 29, 2022
    Inventors: George MURRAY, Grace FAN, Joseph FAN, Dan O'BRIEN, Alex POLOZOV
  • 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
  • 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
  • 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
  • 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
  • Patent number: 5814582
    Abstract: This invention relates to enhancing plant productivity employing a method which supplies to a plant a water-soluble co-polymeric acid having a molecular size larger than about 1,600 Daltons.
    Type: Grant
    Filed: January 10, 1997
    Date of Patent: September 29, 1998
    Assignee: Donlar Corporation
    Inventors: Larry P. Koskan, Abdul Rehman Y. Meah, Robert J. Ross, Lai-Duien Grace Fan