US4272485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Membranes for optodes
Assignee: Max-Planck-Gesellschaft zur Förderung der Wissenschaften eV
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Filing: 1979-09-05
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Granted: 1981-06-09
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Expires: 1999-09-05
Abstract
Abstract In an indicator chamber (e.g., optode) arrangement including an indicator and a membrane which surrounds it and is impermeable to it, a carrier substance is provided within said membrane for transport of particles to be measured into the indicator chamber. Said carrier is mobile within said membrane. This improvement allows for the preparation of highly selective indicator arrangements and broadens the range of applicability of the method of measurement.
Inventors
- 👤 Dietrich W. Lubbers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:15
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/52; G01N33/521; G01N21/00; G01N21/62; G01N21/63; G01N21/64; G01N21/6428; G01N31/00; G01N31/22
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
50 words
In an indicator arrangement comprising an indicator and a membrane forming a chamber surrounding said indicator and impermeable to it, for determination of concentrations of particle components, the improvement comprising providing within said membrane a carrier which is mobile within said membrane and which transports said particles through said membrane.
Claim 2
Dependent Claim
50 words
In an indicator arrangement comprising an indicator and a membrane forming a chamber surrounding said indicator and impermeable to it, for determination of concentrations of particle components, the improvement comprising providing within said membrane a carrier which is mobile within said membrane and which transports said particles through said membrane.
Claim 3
Dependent Claim
30 words
An indicator arrangement as defined in claim 1, wherein said measurement is effected by means of a light measurement system, including a light source, a light receiver and readout means.
Claim 4
Dependent Claim
30 words
An indicator arrangement as defined in claim 1, wherein said measurement is effected by means of an x-ray analysis system including an electron source, and said particles are heavy molecules.
Claim 5
Dependent Claim
14 words
An indicator arrangement as defined in claim 1, wherein said carrier is electrically charged.
Claim 6
Dependent Claim
14 words
An indicator arrangement as defined in claim 1, wherein said carrier is electrically neutral.
Claim 7
Dependent Claim
24 words
An indicator arrangement as defined in claim 1, wherein a substance for binding said particles is provided within said chamber formed by said membrane.
Claim 8
Dependent Claim
13 words
An indicator arrangement as defined in claim 1, wherein said membrane is lipophilic.
Claim 9
Dependent Claim
13 words
An indicator arrangement as defined in claim 1, wherein said membrane is hydrophilic.
Claim 10
Dependent Claim
26 words
An indicator arrangement as defined in claim 1, wherein said carrier is in liquid form embedded with a solid matrix of suitable porosity for said particles.
Claim 11
Dependent Claim
27 words
An indicator arrangement as defined in claim 1, wherein more than one membrane is employed, said membranes being provided with different carriers for transport of said particles.
Claim 12
Dependent Claim
19 words
An indicator arrangement as defined in claim 1, wherein said chamber is in the form of a flat surface.
Claim 13
Dependent Claim
18 words
An indicator arrangement as defined in claim 1, wherein said chamber is in the form of a capsule.
Claim 14
Dependent Claim
14 words
An indicator arrangement as defined in claim 1, wherein a selective indicator is employed.
Claim 15
Dependent Claim
35 words
An indicator arrangement as defined in claim 1, wherein a substance which reacts with said particles is provided within said chamber, said reaction producing reaction products which then modify the optical properties of said indicator.
Claim 16
Dependent Claim
21 words
An indicator arrangement as defined in claim 1, wherein a first chamber is provided within a second chamber which surrounds it.
Claim 17
Dependent Claim
14 words
An indicator arrangement as defined in claim 15; further comprising additional enveloping membrane chambers.
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) | 1984-06-08 | 1984-12-08 | 1985-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-08 | 1988-12-08 | 1989-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-08 | 1992-12-08 | 1993-06-09 | $7700.00 | Window Closed / Lapsed |