Patents by Inventor Song Cao

Song Cao 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).

  • ETCHANT FOR ETCHING WORKPIECES MADE OF ALUMINUM AND ALUMINUM ALLOY
    Publication number: 20080149886
    Abstract: An etchant includes ferric ions (Fe3+) and hydrochloric acid (HCl). The ferric ions (Fe3+) have a concentration in the approximate range of 30-70 grams/liter (g/l). The hydrochloric acid (HCl) has a concentration in the approximate range of 16-50 grams/liter (g/l). The resultant etchant is particularly suitable for etching aluminum and its alloys but may be useful for other etching situations.
    Type: Application
    Filed: May 23, 2007
    Publication date: June 26, 2008
    Applicants: SHENZHEN FUTAIHONG PRECISION INDUSTRIAL CO.,LTD., SUTECH TRADING LIMITED
    Inventors: CHIH-PEN LIN, NIAN-JIANG WU, QING-SONG CAO, NAN-HAI LI
  • ETCHANT FOR ETCHING WORKPIECES MADE OF ALUMINUM AND ALUMINUM ALLOYS
    Publication number: 20080149885
    Abstract: An etchant includes nitric acid (HNO3) having a percentage by mass in the approximate range of 4%-6%, hydrochloric acid (HCl) having a percentage by mass in the approximate range of 1%-3%; and ferric ions (Fe3+) having a concentration in the approximate range of 30-70 grams/liter (g/l). The resultant etchant is suitable for etching aluminum and its alloys. In fact, the etchant is capable of etching such a material to a depth of about 0.1 mm in about 1.8 min, when employed at a temperature in the approximate range of 38° C.-48° C. The etchant further may be recycled, for which an added oxidizer may further be employed.
    Type: Application
    Filed: July 12, 2007
    Publication date: June 26, 2008
    Applicants: SHENZHEN FUTAIHONG PRECISION INDUSTRY CO.,LTD., SUTECH TRADING LIMITED
    Inventors: CHIH-PEN LIN, QING-SONG CAO, NIAN-JIANG WU, NAN-HAI LI