Composition for manufacturing wall of dispensing device

• US 4,729,793 A
• Filed: 09/02/1986
• Issued: 03/08/1988
• Est. Priority Date: 08/09/1985
• Status: Expired due to Term

• Current Assignee: ALZA Corporation (Johnson & Johnson)
• Original Assignee: ALZA Corporation (Johnson & Johnson)
• Inventors: Landrau, Felix A., Eckenhoff, James B., Cortese, Richard
• Primary Examiner(s): Schofer, Joseph L.
• Assistant Examiner(s): MULCAHY, PETER D
• Application Number:
  US06/902,916
• Time in Patent Office: 553 Days
• Field of Search: 106/169, 106/196
• US Class Current: 106/162.72
• CPC Class Codes: A61K 9/0004 Osmotic delivery systems; Sustained release driven by osmosis, thermal energy or gas
• CPC Class Codes: A61M 31/002 Devices for releasing a drug at a continuous and controlled rate for a prolonged period of time artificial gland structures or devices A61F2/022; intra-uterine contraceptive devices A61F6/14; tampons for introducing into the vagina A61F13/20, A61L15/00; suppositories or bougies for intra-vaginal or intra-uterine application A61K9/02; physical forms of medicinal preparations for sustained or differential drug release A61K9/20, A61K9/50

Abstract

A dispensing device is disclosed for delivering a beneficial agent. The device comprises (1) a housing defining an internal space, (2) heat responsive means containing a beneficial agent in the space, (3) means for increasing the amount of beneficial agent delivered from the device in the space, (4) expandable means in the space, (5) an optional dense means in the space, and (6) means in the housing for delivering the beneficial agent from the dispensing device.

Claims

1. A composition for forming a wall of a dispensing device, said composition comprising cellulose acetate butyrate, cellulose acetate, tributyl citrate and triethyl citrate.

2. A composition useful for manufacturing a wall of a dispensing device, said composition comprising cellulose acetate butyrate, cellulose acetate, tributyl citrate, triethyl citrate and polyethylene glycol.