Abstract: Fluorine and/or silicone containing block copolymers are described which are the copolymerization product of mono; di- or trivinyl substituted poly(ethylene oxide) prepolymers (A) and fluoroalkyl-alkylene acrylates or methacrylates (B1), oligosiloxy-silyl alkyl-acrylates or methacrylates (B2), ether copolymerizable comonomers (C), and 0.1 to 10% of a di- or polyvinyl crosslinking comonomer (D) of 200 to 1000 molecular weight. The novel block copolymers are prepared in solution or bulk and form hydrogels, which are characterized by high oxygen permeability, resiliency, flexibility and wettability and are therefore well suited as biocompatible polymers, especially as contact lenses.
Abstract: An iontophoretic agent delivery device, having a layered structure and peripheral insulation, wherein ion transport occurs through two opposing surfaces of said device. The device is especially suited to agent delivery through body surfaces exposed to body fluids. A method of delivering an agent through a body surface exposed to body fluids is also disclosed.
Type:
Grant
Filed:
December 29, 1992
Date of Patent:
March 29, 1994
Assignee:
ALZA Corporation
Inventors:
Felix Theeuwes, J. Richard Gyory, Ronald P. Haak
Abstract: A dosage form is disclosed comprising an anti-Parkinson's disease drug for administering to a patient in need of anti-Parkinson's disease therapy.
Type:
Grant
Filed:
June 17, 1991
Date of Patent:
June 22, 1993
Assignee:
Alza Corporation
Inventors:
David E. Edgren, Howard A. Carpenter, Gurdish K. Bhatti, Atul D. Ayer
Abstract: A dosage form is disclosed comprising means for delaying the delivery of drug from the dosage form following the administration of the dosage form to a patient in need of drug therapy.
Type:
Grant
Filed:
November 26, 1991
Date of Patent:
March 2, 1993
Assignee:
ALZA Corporation
Inventors:
Frank Jao, Patrick S. L. Wong, Hoa T. Huynh, Kathy McChesney, Pamela K. Wat