Patents Assigned to Advanced Separation Technologies Inc.
  • High stability diionic liquid salts
    Publication number: 20060025598
    Abstract: The present invention relates to diionic liquid salts of dicationic or dianionic molecules, as well as solvents comprising diionic liquids and the use of diionic liquids as the stationary phase in a gas chromatographic column.
    Type: Application
    Filed: July 22, 2005
    Publication date: February 2, 2006
    Applicant: Advanced Separation Technologies Inc.
    Inventors: Daniel Armstrong, Jared Anderson
  • Optically enhanced chiral ionic liquids
    Publication number: 20060014955
    Abstract: The invention relates to the use of optically enhanced chiral ionic liquids, particularly for gas chromatography and as a reaction solvent. Specific optically enhanced chiral cationic liquids are described as is a class of optically enhanced chiral anionic liquids.
    Type: Application
    Filed: July 8, 2005
    Publication date: January 19, 2006
    Applicant: Advanced Separation Technologies Inc.
    Inventors: Daniel Armstrong, Jie Ding
  • Macrocyclic antibiotics as separation agents
    Patent number: 5626757
    Abstract: Macrocyclic antibiotics having ring structures with at least 10 members act as separation agents in crystallization, precipitation, filtration, electrophoresis and chromatography. The macrocyclic antibiotics include ansamacrolides, macrolides, macrocyclic peptides, polyenes and derivatives thereof. The process has been found to be especially advantageous for separation of optical isomers by electrophoresis and chromatography.
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: May 6, 1997
    Assignee: Advanced Separation Technologies Inc.
    Inventor: Daniel Armstrong
  • Chiral separation media
    Patent number: 5154738
    Abstract: The media is an ether derivative of cyclodextrin such as a permethylated hydroxy ether of cyclodextrin or a dialkyl trifluoroacetyl ether derivative of cyclodextrin and is used in capillary gas chromatographic columns. Particular benefit is obtained using the ether derivative of cyclodextrin in a fused silica capillary.
    Type: Grant
    Filed: August 20, 1991
    Date of Patent: October 13, 1992
    Assignee: Advanced Separation Technologies, Inc.
    Inventor: Daniel Armstrong
  • Chiral separation media
    Patent number: 5064944
    Abstract: The media is an ether derivative of cyclodextrin such as a permethylated hydroxy ether of cyclodextrin or a dialkyl trifluoroacetyl ether derivative of cyclodextrin and is used in capillary gas chromatographic columns. Particular benefit is obtained using the ether derivative of cyclodextrin in a fused silica capillary.
    Type: Grant
    Filed: August 8, 1990
    Date of Patent: November 12, 1991
    Assignee: Advanced Separation Technologies Inc.
    Inventor: Daniel Armstrong
  • Chiral separation media
    Patent number: 4948395
    Abstract: The media is permethylated hydroxy ether of cyclodextrin and is used in capillary gas chromatographic columns.
    Type: Grant
    Filed: September 12, 1989
    Date of Patent: August 14, 1990
    Assignee: Advanced Separations Technologies Inc.
    Inventor: Daniel W. Armstrong
  • Bonded phase material for chromatographic separations
    Patent number: 4539399
    Abstract: A highly selective bonded phase material useful to separate a wide variety of organic and inorganic substances by thin layer chromatography (TLC), liquid chromatography (LC) or high performance liquid chromatography (HPLC) is produced by bonding a cyclodextrin to a silica gel by means of a specific silane linkage. The preparation of such materials and their uses are described.
    Type: Grant
    Filed: July 27, 1984
    Date of Patent: September 3, 1985
    Assignee: Advanced Separation Technologies Inc.
    Inventor: Daniel W. Armstrong