Patents by Inventor Mei-Yuan Tsai

Mei-Yuan Tsai 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).

  • Patent number: 5114798
    Abstract: A recording medium lubricated with a thin film of a substituted N-acyl sarcosine. The lubricant is dissolved in a volatile organic solvent (preferably hexane) and coated onto the recording medium. A particularly preferred lubricant is N-oleoyl sarcosine.
    Type: Grant
    Filed: June 19, 1991
    Date of Patent: May 19, 1992
    Assignee: Aluminum Company of America
    Inventors: Mei-Yuan Tsai, Vincent A. Paola
  • Patent number: 4655947
    Abstract: A metalworking lubricant composition comprising mineral oil and a trimethylolalkane ester. A metalworking lubricant emulsion is prepared by mixing about 1-5 wt % of the composition with about 95-99 wt % water. A preferred lubricant composition exhibits an unusual combination of lower wear than prior art compositions along with higher friction when tested on aluminum alloy samples. Accordingly, the lubricant composition is suitable for hot rolling or cold rolling aluminum and aluminum alloys.
    Type: Grant
    Filed: July 23, 1986
    Date of Patent: April 7, 1987
    Assignee: Aluminum Company of America
    Inventors: Mei-Yuan Tsai, Joseph T. Laemmle
  • Patent number: 4628985
    Abstract: A process is disclosed for the continuous casting of a lithium-containing alloy including casting the alloy through a mold and applying alpha-olefin oligomer to the mold. In one aspect, the process includes a lubricant containing alpha-olefin oligomer, preferably having a viscosity in the range of about 1-3 cs at 450.degree. F. In another aspect, the process includes a lubricant containing less than the varnish-film forming amount of fatty ester, fatty acid, or fatty alcohol.
    Type: Grant
    Filed: December 6, 1984
    Date of Patent: December 16, 1986
    Assignee: Aluminum Company of America
    Inventors: John E. Jacoby, Joseph T. Laemmle, Mei-Yuan Tsai
  • Patent number: 4618441
    Abstract: A metalworking method that includes a step of applying to a metal object a lubricant composition comprising a major proportion of mineral oil and a minor proportion of an alkoxyalkyl ester having the general formula R.sub.2 COO(CH.sub.2 CH.sub.2 O).sub.n R.sub.1 wherein n=1 or 2, R.sub.1 is a C.sub.1 to C.sub.8 alkyl group and R.sub.2 is a C.sub.7 to C.sub.19 alkyl or alkenyl group. A particularly preferred composition comprises about 30 wt % butoxyethyl stearate dissolved in about 70 wt % mineral oil.A metalworking lubricant emulsion is formed by emulsifying about 2-10 wt % of the composition in about 90-98 wt % water. A particularly preferred emulsion comprises about 5 wt % of the composition emulsified in about 95 wt % water. The method is particularly suitable for hot rolling and cold rolling aluminum and aluminum alloys.
    Type: Grant
    Filed: November 23, 1984
    Date of Patent: October 21, 1986
    Assignee: Aluminum Company of America
    Inventor: Mei-Yuan Tsai
  • Patent number: 4607679
    Abstract: The present invention involves a process for continuously casting a lithium-containing alloy by direct chill with a direct chill coolant and providing a moisture barrier liquid having a flash point higher than about 400.degree. F. to reduce water absorption in the coolant. The process in one aspect includes applying the moisture barrier liquid as a mold parting composition containing less than a varnish-film forming amount of fatty esters, fatty acids, or fatty alcohols. The process is particularly useful in the direct chill casting of aluminum-lithium alloy by direct chill with ethylene glycol coolant.
    Type: Grant
    Filed: December 6, 1984
    Date of Patent: August 26, 1986
    Assignee: Aluminum Company of America
    Inventors: Mei-Yuan Tsai, John E. Jacoby, Joseph T. Laemmle
  • Patent number: 4602670
    Abstract: A lubricating process is disclosed for continuously casting molten metal through a mold or header including applying a parting lubricant containing alpha-olefin oligomer to the mold or header. In one aspect, the process includes applying a parting lubricant containing alpha-olefin oligomer and fatty ester.
    Type: Grant
    Filed: December 6, 1984
    Date of Patent: July 29, 1986
    Assignee: Aluminum Company of America
    Inventors: Joseph T. Laemmle, Mei-Yuan Tsai, John E. Jacoby
  • Patent number: 4585565
    Abstract: A lubricant composition comprising a major proportion of mineral oil and a minor proportion of an alkoxyalkyl ester having the general formula R.sub.2 COO(CH.sub.2 CH.sub.2 O).sub.n R.sub.1 wherein n=1 or 2, R.sub.1 is a C.sub.1 to C.sub.8 alkyl group and R.sub.2 is a C.sub.7 to C.sub.19 alkyl or alkenyl group. A particularly preferred composition comprises about 30 wt % butoxyethyl stearate dissolved in about 70 wt % mineral oil.A metalworking lubricant emulsion is formed by emulsifying about 2-10 wt % of the composition in about 90-98 wt % water. A particularly preferred emulsion comprises about 5 wt % of the composition in about 95 wt % water. The emulsion is suitable for hot rolling and cold rolling aluminum and aluminum alloys.
    Type: Grant
    Filed: November 23, 1984
    Date of Patent: April 29, 1986
    Assignee: Aluminum Company of America
    Inventor: Mei-Yuan Tsai