US4779806A
Expired / Lapsed
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Ultrasonically modulated polymeric devices for delivering compositions
Assignee: Massachusetts Institute of Technology
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Filing: 1986-11-28
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Granted: 1988-10-25
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Expires: 2006-11-28
Abstract
Abstract A composition such as a biologically active substance is delivered upon demand from a polymeric matrix by exposing the polymeric matrix containing the composition to ultrasonic energy.
Inventors
- 👤 Robert S. Langer
- 👤 Joseph Kost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:37
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0002; A61K9/0009; A61K41/00; A61K41/0047; A61K9/20; A61K9/2004; A61K9/2022; A61K9/2027; A61K9/2031; C; C08; C08G; C08G67/00; C08G67/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
66 words
A process for delivering a composition on demand which comprises: incorporating said composition within a polymeric matrix, surrounding said composition and polymeric matrix with a liquid medium, and exposing said polymeric matrix to ultrasonic energy for a predetermined time and at a frequency to effect cavitation of said polymeric matrix to release said composition from said matrix in a controlled manner over a specific time period.
Claim 2
Dependent Claim
66 words
A process for delivering a composition on demand which comprises: incorporating said composition within a polymeric matrix, surrounding said composition and polymeric matrix with a liquid medium, and exposing said polymeric matrix to ultrasonic energy for a predetermined time and at a frequency to effect cavitation of said polymeric matrix to release said composition from said matrix in a controlled manner over a specific time period.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein the composition is a fragrance.
Claim 4
Dependent Claim
11 words
The process of claim 1 wherein said composition is a pheromone.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |