Patents by Inventor Donna Wu

Donna Wu 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).

  • Three-in-one composition for dishwashing machines
    Patent number: 6326343
    Abstract: A dishwashing composition with polymers having a positive charge and water soluble entities that reduce phosphate scale formation is described. The dishwashing composition displays excellent cleaning benefits and gloss appearance, even in the absence of NaCl additives and conventional rinse aid compositions.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: December 4, 2001
    Assignee: Unilever Home & Personal Care USA, Division of Conopco, Inc.
    Inventors: Naresh Dhirajlal Ghatlia, Donna Wu, Alla Tartakovsky, Joseph Oreste Carnali, Yu-Min Catherine Chiou
  • Process for the preparation of 2,2'-oxydisuccinate
    Patent number: 5696288
    Abstract: A process for the preparation of 2,2'-oxydisuccinate from undissolved solid, powdered or comminuted maleate and malate species added to a slurry of alkaline earth metal hydroxide is disclosed which cooperatively controls pH, temperature, time and ratio of reactants to effectively avoid substantial phase separation.
    Type: Grant
    Filed: June 19, 1996
    Date of Patent: December 9, 1997
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Eddie Nelson Gutierrez, Donna Wu, Shang-Ren Wu
  • Process for the preparation of an enriched 2,2'-oxydisuccinate reaction mixture by removal of calcium malate
    Patent number: 5466868
    Abstract: A process for the preparation of enriched reaction mixtures containing 2,2'-oxydisuccinate (alkaline earth metal salts) is disclosed, by pH reduction and removal of alkaline earth metal malates.
    Type: Grant
    Filed: October 14, 1994
    Date of Patent: November 14, 1995
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Shang-Ren Wu, Donna Wu, Eddie N. Gutierrez
  • Process for the preparation of 2,2'-oxydisuccinate
    Patent number: 5391823
    Abstract: A process for the preparation of 2,2'-oxydisuccinate from maleate, malate and alkaline earth metal hydroxide is disclosed which cooperatively control pH, temperature, time and ratio of reactants to effectively avoid substantial phase separation.
    Type: Grant
    Filed: September 24, 1993
    Date of Patent: February 21, 1995
    Assignee: Lever Brothers Company
    Inventors: Eddie N. Gutierrez, Michael I. Hill, Martina Santoso, Donna Wu, Shang-Ren Wu