Patents by Inventor Mei Tak Lok

Mei Tak Lok 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).

  • Titanium-aluminum-silicon-oxide molecular sieve compositions
    Patent number: 4788380
    Abstract: Titanium-aluminum-silicon-oxide molecular sieves are disclosed having use as molecular sieves and as catalyst compositions in hydrocarbon conversion and other processes. The molecular sieves have a unit empirical formula on an anhydrous basis ofmR: (Ti.sub.x Al.sub.y Si.sub.z)O.sub.2wherein "R" represents at least one organic+ emplating agent; "m" represents the moles of "R" present per mole of (Ti.sub.x Al.sub.y Si.sub.z)O.sub.2 ; and "x", "y" and "z" represent the mole fractions of titanium, aluminum and silicon, respectively, present as tetrahedral oxides. The molecular sieve is useful in separating molecular species having different degrees of polarity and/or kinetic diameters.
    Type: Grant
    Filed: August 5, 1987
    Date of Patent: November 29, 1988
    Assignee: Union Carbide Corporation
    Inventors: Brent Mei Tak Lok, Bonita K. Marcus, Edith M. Flanigen
  • Salts of alkali metal anions and process of preparing same
    Patent number: 4107180
    Abstract: Compounds of alkali metal anion salts of alkali metal cations in bicyclic polyoxadiamines are disclosed. The salts are prepared by contacting an excess of alkali metal with an alkali metal dissolving solution consisting of a bicyclic polyoxadiamine in a suitable solvent, and recovered by precipitation. The salts have a gold-color crystalline appearance and are stable in a vacuum at -10.degree. C. and below.
    Type: Grant
    Filed: November 29, 1974
    Date of Patent: August 15, 1978
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: James L. Dye, Joseph M. Ceraso, Frederick J. Tehan, Mei Tak Lok