US4624945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispensing system with means for increasing delivery of beneficial agent from the system
Assignee: Merck and Co Inc
•
Filing: 1985-08-09
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Granted: 1986-11-25
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Expires: 2005-08-09
Abstract
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.
Inventors
- 👤 James B. Eckenhoff
- 👤 Richard Cortese
- 👤 Felix A. Landrau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:14
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0053; A61K9/0068; A61K9/0002; A61K9/0004; A61M; A61M31/00; A61M31/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
A composition of matter consisting essentially of the beneficial agent ivermectin and a copolymer of 1,2-butylene oxide and ethylene oxide.
Claim 2
Dependent Claim
20 words
A composition of matter consisting essentially of the beneficial agent ivermectin and a copolymer of 1,2-butylene oxide and ethylene oxide.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-24 | 1990-05-26 | 1990-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-24 | 1994-05-26 | 1994-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-24 | 1998-05-26 | 1998-11-25 | $7700.00 | Window Closed / Lapsed |