Allan M Wolfe

US Patent:

45333483, Aug 6, 1985

Filed:

Sep 12, 1984

Appl. No.:

6/649778

Inventors:

Allan M. Wolfe - South Laguna CA
James M. Davenport - Tustin CA
Felix Theeuwes - Los Altos CA
Su I. Yum - Sunnyvale CA

Assignee:

ALZA Corporation - Palo Alto CA

International Classification:

A61M 514

US Classification:

604 85

Abstract:

A formulation dispenser is disclosed for use in a parenteral delivery system. The dispenser comprises an inlet for admitting fluid into the dispenser and an outlet for letting fluid leave the dispenser. A beneficial agent is housed in a formulation chamber in the dispenser and a membrane permeable to fluid and agent defines one boundary of the formulation chamber. A piston is slideably disposed in the dispenser for governing the flow of fluid through the dispenser, or for permitting fluid to contact the membrane and enter the formulation chamber for forming a solution containing agent that flows through the outlet into the parenteral system.

US Patent:

44745745, Oct 2, 1984

Filed:

Jul 29, 1983

Appl. No.:

6/518490

Inventors:

Allan M. Wolfe - South Laguna CA
James M. Davenport - Tustin CA
Felix Theeuwes - Los Altos CA
Su I. Yum - Sunnyvale CA

Assignee:

ALZA Corporation - Palo Alto CA

International Classification:

A16M 514

US Classification:

604 85

Abstract:

A formulation dispenser is disclosed for use in a parenteral delivery system. The dispenser comprises an inlet for admitting fluid into the dispenser and an outlet for letting fluid leave the dispenser. A beneficial agent is housed in a formulation chamber in the dispenser and a membrane permeable to fluid and agent defines one boundary of the formulation chamber. A piston is slideably disposed in the dispenser for governing the flow of fluid through the dispenser, or for permitting fluid to contact the membrane and enter the formulation chamber for forming a solution containing agent that flows through the outlet into the parenteral system.