Patents by Inventor Harold David

Harold David 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).

  • Aromatic substituted glycoside
    Patent number: 5320954
    Abstract: An aromatic substituted glycoside is disclosed of the formula ##STR1## wherein the configuration of the substituted --OR on the anomeric carbon is alpha, n is an integer of 0 or 1, and R is a substituted aromatic radical selected from the group ##STR2## where R.sub.1 through R.sub.6 are independently halogen, NO.sub.2, SO.sub.3 H, COR.sub.7, ##STR3## where R.sub.7 is lower alkyl; and includes its stereoisomers, optical isomers and geometric isomers and mixtures of the foregoing isomers. These substrates are useful as direct substrates for alpha-amylases. A process for the preparation of the substrates and related substances is also described.
    Type: Grant
    Filed: September 3, 1992
    Date of Patent: June 14, 1994
    Assignee: Hoechst Celanese Corporation
    Inventors: Rodrigo G. Chavez, Harold David, Ernest K. Metzner, Gerald F. Sigler, Emily S. Winn-Deen
  • Aromatic substituted glycoside
    Patent number: 5158872
    Abstract: An aromatic substituted glycoside is disclosed of the formula ##STR1## wherein the configuration of the substituted --OR on the anomeric carbon is alpha, n is an integer of 0 or 1, and R is a substituted aromatic radical selected from the group ##STR2## where R.sub.1 through R.sub.6 are independently halogen, NO.sub.2, SO.sub.3 H, ##STR3## where R.sub.7 is lower alkyl; and includes its stereoisomers, optical isomers and geometric isomers and mixtures of the foregoing isomers. These substrates are useful as direct substrates for alpha-amylases. A process for the preparation of the substrates and related substances is also described.
    Type: Grant
    Filed: August 10, 1990
    Date of Patent: October 27, 1992
    Assignee: Hoechst Celanese Corporation
    Inventors: Rodrigo G. Chavez, Harold David, Ernest K. Metzner, Gerald F. Sigler, Emily S. Winn-Deen
  • Reagent system for an alpha-amylase assay containing aromatic substituted glycoside
    Patent number: 4963479
    Abstract: An aromatic substituted glycoside is disclosed of the formula ##STR1## wherein the configuration of the substituted --OR on the anomeric carbon is alpha, n is an integer of 0 to 1, and R is a substituted aromatic radical selected from the group ##STR2## where R.sub.1 through R.sub.6 are independently halogen, NO.sub.2, SO.sub.3 H, ##STR3## where R.sub.7 is lower alkyl; and includes its stereoisomers, optical isomers and geometric isomers and mixtures of the foregoing isomers. These substrates are useful as direct substrates for alpha-amylases. A process for the preparation of the substrates and related substances is also described.
    Type: Grant
    Filed: September 4, 1987
    Date of Patent: October 16, 1990
    Assignee: Hoechst Celanese Corporation
    Inventors: Rodrigo G. Chavez, Harold David, Ernest K. Metzner, Gerald F. Sigler, Emily S. Winn-Deen