Patent US4969873A successfully refreshed from Google Patents.
US4969873A
Expired / Lapsed
US
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Device for dispensing active substances to a patient
Assignee: Fresenius Hemocare GmbH
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Filing: 1989-06-22
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Granted: 1990-11-13
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Expires: 2009-06-22
Abstract
Abstract Septum for implantable devices for dispensing active substances, for example medicaments, to the body of the patient. The septum is inserted as a cover of a medicament chamber into the associated opening by means of one or more clamping members, the septum (22; 36; 10) being formed annularly with part (32) of the apparatus wall disposed within the septum and connected fixedly to the remaining housing (31).
Inventors
- 👤 Bernd Steinbach
- 👤 Leopold Schlogl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:40
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/142; A61M5/14244; A61M5/14276; A61M39/00; A61M39/02; A61M39/0208; A61M2039/0238; Y; Y10; Y10S; Y10S128/00; Y10S128/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
52 words
An implantable device for dispensing an active substance to a patient, said device comprising: a housing defining a medicament chamber; a wall of said housing defining an annular opening communicating with said medicament chamber; an annular first septum covering said annular opening; and means for sealingly engaging said septum to said housing.
Claim 2
Dependent Claim
52 words
An implantable device for dispensing an active substance to a patient, said device comprising: a housing defining a medicament chamber; a wall of said housing defining an annular opening communicating with said medicament chamber; an annular first septum covering said annular opening; and means for sealingly engaging said septum to said housing.
Claim 3
Dependent Claim
75 words
The implantable device of claim 1, wherein said device further comprises: a flexible membrane separating said medicament chamber from a propellant chamber; and a propellant chamber for containing a propellant capable of expanding isobarically with evaporation, said propellant chamber cooperating with said medicament chamber through said flexible membrane to reduce the volume of said medicament chamber upon expansion of said propellant; said medicament chamber including a dispensing opening in fluid communication with a dispensing catheter.
Claim 4
Dependent Claim
47 words
The implantable device of claim 2, wherein said device further comprises: a replenishing opening in said housing in fluid communication with said medicament chamber; and means mounted to said replenishing opening for introducing a medicament to said medicament chamber; and a second septum sealing said replenishing opening.
Claim 5
Dependent Claim
31 words
The implantable device of claim 3, wherein: said replenishing opening is disposed centrally on the medicament chamber housing; and said first septum is disposed concentrically with respect to said replenishing opening.
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) | 1993-11-12 | 1994-05-14 | 1994-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-12 | 1998-05-14 | 1998-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-12 | 2002-05-14 | 2002-11-13 | $7700.00 | Window Closed / Lapsed |