Patents by Inventor Roland L. Walters

Roland L. Walters 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).

  • Fluorescence polarazation immunoassay for tetrahydrocannabinoids
    Patent number: 5463027
    Abstract: This disclosure related to a method and reagents for determining tetrahydrocannabinoids (THC) and THC metabolites in a biological fluid such as urine. In particular, this disclosure relates to a fluorescence polarization immunoassay procedure for determining the presence of THC and to a novel class of tracer compounds employed as reagents in such procedures. The procedure described also provides for novel wash reagent for a THC fluorescence polarization assay.
    Type: Grant
    Filed: August 10, 1994
    Date of Patent: October 31, 1995
    Assignee: Abbott Laboratories
    Inventors: Nai-Yi Wang, Robert E. Dubler, Frank S. Ungemach, Roland L. Walters, Susan A. Thacker
  • Fluorescence polarization immunoassay for tetrahydrocannabinoids
    Patent number: 5264373
    Abstract: This disclosure related to a method and reagents for determining tetrahydrocannabinoids (THC) and THC metabolites in a biological fluid such as urine. In particular, this disclosure relates to a fluorescence polarization immunoassay procedure for determining the presence of THC and to a novel class of tracer compounds employed as reagents in such procedures. The procedure described also provides for novel wash reagent for a THC fluorescence polarization assay.
    Type: Grant
    Filed: September 1, 1992
    Date of Patent: November 23, 1993
    Assignee: Abbott Laboratories
    Inventors: Nai-Yi Wang, Robert E. Dubler, Frank S. Ungemach, Roland L. Walters, Susan A. Thacker
  • Fluorescene polarization immunoassay for tetrahydrocannabinoids
    Patent number: 5144030
    Abstract: This disclosure related to a method and reagents for determining tetrahydrocannabinoids (THC) and THC metabolites in a biological fluid such as urine. In particular, this disclosure relates to a fluorescence polarization immunoassay procedure for determining the presence of THC and to a novel class of tracer compounds employed as reagents in such procedures. The procedure described also provides for novel wash reagent for a THC fluorescence polarization assay.
    Type: Grant
    Filed: June 12, 1989
    Date of Patent: September 1, 1992
    Assignee: Abbott Laboratories
    Inventors: Nai-Yi Wang, Robert E. Dubler, Frank S. Ungemach, Roland L. Walters, Susan A. Thacker
  • 1-(Pyridazinyl)pyrazoline derivatives
    Patent number: 4503056
    Abstract: Described are compounds of the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 independently of one another denote hydrogen or loweralkyl, X is hydroxy or amino, and Y is hydrogen, loweralkyl, loweralkoxy, benzyl or ##STR2## wherein W and Z independently of one another denote hydrogen, halo, loweralkyl, loweralkoxy, trifluoromethyl, acetamido, cyano, diloweralkylamino, phenoxy and loweralkylmercapto, and pharmaceutically acceptable salts thereof.The compounds are effective as anti-inflammatory agents.
    Type: Grant
    Filed: March 2, 1982
    Date of Patent: March 5, 1985
    Assignee: Abbott Laboratories
    Inventors: Fortuna Haviv, Roland L. Walters
  • Process for making 4-aroyl-substituted phenoxyacetic acids
    Patent number: 4220801
    Abstract: 2,3-Dichloro-4-(hydroxybenzoyl)phenoxyacetic acid, its analogs and their salts are powerful uricosuric diuretics; they can be made in a one-pot reaction from a loweralkyl 2,3-dichloro-4-(nitrobenzoyl)phenoxyacetate or its analogs.
    Type: Grant
    Filed: July 23, 1979
    Date of Patent: September 2, 1980
    Assignee: Abbott Laboratories
    Inventors: Roland L. Walters, Wayne R. Heitmann