Patents by Inventor Ying Y. Hsu

Ying Y. Hsu 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: 4356104
    Abstract: Disclosed are compounds of the formula: ##STR1## wherein R.sub.1 is an alkyl group and R.sub.2 is an alkyl, alkoxy, acyloxy, alkyl carbonato group having 1 to 10 carbon atoms, CN or NO.sub.2. The compounds of the invention are useful as liquid crystal materials in electrooptical displays.Also disclosed are novel admixtures of the above benzoate compounds with cyanophenyl dioxane compounds, these admixtures being especially useful for multiplexed electrooptical displays. Preferred admixtures include at least about 40 weight percent of the above benzoate compounds and at least about 40 weight percent of cyanophenyl dioxane compounds with other liquid crystalline compounds such as phenyl cyclohexanecarboxylate, biphenyl and/or phenyl benzoate liquid crystalline compounds also being present in amounts up to about 20 weight percent.
    Type: Grant
    Filed: June 29, 1981
    Date of Patent: October 26, 1982
    Assignee: Timex Corporation
    Inventor: Ying Y. Hsu
  • Patent number: 4313878
    Abstract: Disclosed are compounds of the formula: ##STR1## wherein R.sub.1 is an alkyl group and R.sub.2 is an alkyl, alkoxy, acyloxy, alkyl carbonato group having 1 to 10 carbon atoms, CN or NO.sub.2. The compounds of the invention are useful as liquid crystal materials in electrooptical displays.Also disclosed are novel admixtures of the above benzoate compounds with cyanophenyl dioxane compounds, these admixtures being especially useful for multiplexed electrooptical displays. Preferred admixtures include at least about 40 weight percent of the above benzoate compounds and at least about 40 weight percent of cyanophenyl dioxane compounds with other liquid crystalline compounds such as phenyl cyclohexanecarboxylate, biphenyl and/or phenyl benzoate liquid crystalline compounds also being present in amounts up to about 20 weight percent.
    Type: Grant
    Filed: December 3, 1980
    Date of Patent: February 2, 1982
    Assignee: Timex Corporation
    Inventor: Ying Y. Hsu
  • Patent number: 4200580
    Abstract: Compounds of the formula: ##STR1## wherein R.sub.1 is a straight chain alkyl group of 1 to 10 carbon atoms and R.sub.2 is an alkyl, alkoxy, acyloxy, alkyl carbonato group having 1 to 10 carbon atoms, CN or NO.sub.2. The dioxanylphenyl benzoate compounds of the invention are useful as liquid crystal materials in electro-optical displays.
    Type: Grant
    Filed: March 5, 1979
    Date of Patent: April 29, 1980
    Assignee: Timex Corporation
    Inventor: Ying Y. Hsu