Patents by Inventor Robert S. Levinson

Robert S. Levinson 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).

  • Drug delivery by injection with thermoreversible gels containing polyoxyalkylene copolymers
    Patent number: 5306501
    Abstract: Isotonic, iso-osmotic, pH balanced thermoreversible gels are ideal medical devices or vehicles for drug injection into the body of a mammal. The osmolality in the gel state can be calculated by assuming that a polyoxyalkylene block copolymer or polyether present in said gel does not contribute to the osmolality in the gel state, although it does contribute to the osmolality in the liquid state.
    Type: Grant
    Filed: November 8, 1991
    Date of Patent: April 26, 1994
    Assignee: Mediventures, Inc.
    Inventors: Tacey X. Viegas, Lorraine E. Reeve, Robert S. Levinson
  • Ophthalmic drug delivery with thermoreversible polyoxyalkylene gels adjustable for pH
    Patent number: 5300295
    Abstract: Aqueous gel drug delivery compositions and medical devices, useful for treating an eye condition, having hyperosmotic, iso-osmotic or hypo-osmotic characteristics in the gel state, are obtained by calculating the osmolality required in the liquid state to reach a desired osmotic force in the gelled state by assuming that a polyoxyalkylene block copolymer does not contribute to the osmolality in the gel state.
    Type: Grant
    Filed: September 13, 1991
    Date of Patent: April 5, 1994
    Assignee: Mediventures, Inc.
    Inventors: Tacey X. Viegas, Lorraine E. Reeve, Robert S. Levinson
  • Topical drug delivery with polyoxyalkylene polymer thermoreversible gels adjustable for pH and osmolality
    Patent number: 5298260
    Abstract: Iso-osmotic, hyperosmotic, or hypo-osmotic, pH balanced, thermoreversible gels are ideal medical devices or vehicles for drug delivery to the skin of a mammal. The osmolality in the gel state can be calculated by assuming that a polyoxyalkylene block copolymer or polyether present in said gel does not contribute to the osmolality in the gel state, although it does contribute to the measured osmolality in the liquid state.
    Type: Grant
    Filed: June 9, 1992
    Date of Patent: March 29, 1994
    Assignee: Mediventures, Inc.
    Inventors: Tacey X. Viegas, Lorraine E. Reeve, Robert S. Levinson
  • Body cavity drug delivery with thermoreversible gels containing polyoxyalkylene copolymers
    Patent number: 5292516
    Abstract: Isotonic, iso-osmotic, pH balanced thermoreversible gels are ideal vehicles for drug delivery to a body cavity of a mammal. The osmolality in the gel state can be calculated by assuming that a polyoxyalkylene block copolymer or polyether present in said gel does not contribute to the osmolality in the gel state, although it does contribute to the osmolality in the liquid state.
    Type: Grant
    Filed: November 8, 1991
    Date of Patent: March 8, 1994
    Assignee: Mediventures, Inc.
    Inventors: Tacey X. Viegas, Lorraine E. Reeve, Robert S. Levinson
  • Peritoneal dialysis method
    Patent number: 4976683
    Abstract: This invention relates to an improved method for conducting peritoneal dialysis with a decreased total volume of dialysis fluid used and increased efficacy parameters such as ultrafiltration rate, urea clearance rate and dialysate volume as compared to conventional techniques. In the method of this invention, a fluid communication through the peritoneal membrane into the peritoneal cavity of a patient in need of peritoneal dialysis treatment is established. An initial volume of an aqueous peritoneal dialysis composition containing an osmotic agent is instilled into the peritoneal cavity through the fluid communication.
    Type: Grant
    Filed: July 18, 1988
    Date of Patent: December 11, 1990
    Assignee: Abbott Laboratories
    Inventors: Robert J. Gauthier, Robert S. Levinson