Patent US4209014A successfully refreshed from Google Patents.
US4209014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispensing device for medicaments
Assignee: University of Toronto
•
Filing: 1977-12-12
•
Granted: 1980-06-24
•
Expires: 1997-12-12
Abstract
Abstract An implantable device for dispensing a medicament in two modes; a basal delivery rate and an augmented rate. The device includes a permeable elastic material adapted to be repeatedly compressed by a solenoid operated piston. The device delivers a basal rate when the piston is inoperative and an augmented rate when the permeable elastic material is compressed. The device is suitable for delivering insulin in an "artificial endocrine pancreas".
Inventors
- 👤 Michael V. Sefton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:53
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/142; A61M5/14244; A61M5/14276; A61M2005/1401; A61M2005/1405; Y; Y10; Y10S; Y10S128/00; Y10S128/01
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
96 words
A device for dispensing a medicament comprising: an elastic material permeable to the medicament; a housing for confining the permeable elastic material, said housing having an inlet for connection with a continuous supply of the medicament, and an outlet for delivery; a reciprocatable piston for repeatedly compressing the permeable elastic material; and means for reciprocating said piston; the device being operative with a supply of medicament connected to said inlet to deliver the medicament at a basal rate when the piston is inoperative, and at an augmented rate when the permeable elastic material is repeatedly compressed.
Claim 2
Independent Claim
96 words
A device for dispensing a medicament comprising: an elastic material permeable to the medicament; a housing for confining the permeable elastic material, said housing having an inlet for connection with a continuous supply of the medicament, and an outlet for delivery; a reciprocatable piston for repeatedly compressing the permeable elastic material; and means for reciprocating said piston; the device being operative with a supply of medicament connected to said inlet to deliver the medicament at a basal rate when the piston is inoperative, and at an augmented rate when the permeable elastic material is repeatedly compressed.
Claim 3
Dependent Claim
20 words
The device of claim 1 wherein the means for activating the piston comprises a solenoid operatively connected to the piston.
References Cited (Backward Citations)
US1213655A
Cited
US1410530A
Cited
US1578517A
Cited
US1860277A
Cited
US2605765A
Cited
US3512940A
Cited
US3604417A
Cited
US3850348A
Cited
US3975350A
Cited
US4003379A
Cited
US3991750A
Cited
US4055175A
Cited
US4103686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-24 | 1983-12-24 | 1984-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-24 | 1987-12-24 | 1988-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-24 | 1991-12-24 | 1992-06-24 | $7700.00 | Window Closed / Lapsed |