US4197852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter electrode for electrochemical analysis
Assignee: Dr Eduard Fresenius Chemisch Pharmazeutische Industrie KG Apparatebau KG
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Filing: 1978-06-05
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Granted: 1980-04-15
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Expires: 1998-06-05
Abstract
Abstract The electrical sensor of the present invention for electrochemical analysis comprises a sheath and at one end thereof a semi-permeable membrane which is impermeable for macromolecular materials and bacteria, and further is comprising a measuring probe insertible to said sheath. The sheath is constructed in the form of a pericatheter and the measuring probe comprises a completely self-contained sensor, capable of operating independently of the said sheath, the membrane of said sensor being in direct contact with the membrane of said pericatheter.
Inventors
- 👤 Johannes G. Schindler
- 👤 Wilfried Schal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:11
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/145; A61B5/14542; A61B5/1468; A61B5/1473
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
83 words
An electrochemical analysis sensor comprising: (a) a sheath constructed as a pericatheter being closed at one end thereof by a semi-permeable membrane being an integral part thereof, said membrane being permeable to certain predetermined substances, but impervious to macromolecules and bacteria; and (b) a replaceable measuring probe having a membrane at one end thereof, disposed in said sheath, said measuring probe being a completely self-contained sensing device, said probe membrane and said sheath membrane being in intimate contact and free of electrolyte therebetween.
Claim 2
Dependent Claim
83 words
An electrochemical analysis sensor comprising: (a) a sheath constructed as a pericatheter being closed at one end thereof by a semi-permeable membrane being an integral part thereof, said membrane being permeable to certain predetermined substances, but impervious to macromolecules and bacteria; and (b) a replaceable measuring probe having a membrane at one end thereof, disposed in said sheath, said measuring probe being a completely self-contained sensing device, said probe membrane and said sheath membrane being in intimate contact and free of electrolyte therebetween.
Claim 3
Dependent Claim
14 words
A sensor wherein said pericatheter sheath and said measuring probe are a flexible tube.
Claim 4
Dependent Claim
14 words
A sensor wherein said pericatheter sheath and said measuring probe are a flexible tube.
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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) | 1983-04-15 | 1983-10-15 | 1984-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-15 | 1987-10-15 | 1988-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-15 | 1991-10-15 | 1992-04-15 | $7700.00 | Window Closed / Lapsed |