US5294402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical sensors
Assignee: BASF SE
•
Filing: 1992-06-26
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Granted: 1994-03-15
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Expires: 2012-06-26
Abstract
Abstract A chemical sensor consists of (a) a solid substrate, (b) a layer (D) which is applied to the substrate and contains one or more fluorescent compounds and (c) a layer (A) which is applied to the layer (D) and contains one or more coupling components (K) which, as a result of reacting with the analyte, give rise to one or more specific absorption bands, some or all of which overlap in the spectrum with the emission of the fluorescent compound of layer (D).
Inventors
- 👤 Wolfgang Schrepp
- 👤 Ramesh C. Ahuja
- 👤 Wolfgang Budach
- 👤 Dietmar Moebius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:19
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/62; G01N21/63; G01N21/64; G01N21/6428; G01N21/643; G01N21/17; G01N33/00; G01N33/48; G01N33/50; G01N33/52; G01N33/53; G01N33/543; G01N33/54366; G01N33/54373; G01N21/75; G01N21/77; G01N21/7703; G01N2021/7706; G01N2021/773
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
96 words
A chemical sensor to be used in a solvent containing an analyte consisting of (a) a solid substrate, (b) a layer (D) which is applied to the substrate and consists essentially of one or more fluorescent compounds and (c) a layer (A) which is applied to the layer (D) and consists essentially of one or more coupling components (K) which, as a result of reacting with the analyte, give rise to one or more specific absorption bands, some or all of which overlap in the spectrum with the emission of the fluorescent compound of layer (D).
Claim 2
Dependent Claim
96 words
A chemical sensor to be used in a solvent containing an analyte consisting of (a) a solid substrate, (b) a layer (D) which is applied to the substrate and consists essentially of one or more fluorescent compounds and (c) a layer (A) which is applied to the layer (D) and consists essentially of one or more coupling components (K) which, as a result of reacting with the analyte, give rise to one or more specific absorption bands, some or all of which overlap in the spectrum with the emission of the fluorescent compound of layer (D).
Claim 3
Dependent Claim
26 words
A chemical sensor as claimed in claim 1, wherein the layers applied to the solid substrate have a total thickness of from 20 to 200 Å.
Claim 4
Dependent Claim
21 words
A chemical sensor as claimed in claim 1, wherein the solid substrate consists of quartz or glass and may be pretreated.
Claim 5
Dependent Claim
32 words
A chemical sensor as claimed in claim 1, wherein the coupling components (K) of layer (A) on the surface of the sensor are in direct contact with the solution of the analyte.
Claim 6
Dependent Claim
29 words
A chemical sensor as claimed in claim 1, wherein the distance between the chromophore of layer (D) and the coupling component of layer (A) corresponds to the Forster radius.
Claim 7
Dependent Claim
26 words
A chemical sensor as claimed in claim 1, wherein the fluorescent compound of layer (D) is present, distributed or bound in a polymer or monomer matrix.
Claim 8
Dependent Claim
18 words
A chemical sensor as claimed in claim 1, wherein J or disk aggregates are formed in layer (D).
Claim 9
Dependent Claim
33 words
A chemical sensor as claimed in claim 1, wherein the coupling component (K) of layer (A) is a compound which is capable of interacting with ions or organic molecules by a host/guest reaction.
Claim 10
Dependent Claim
27 words
A chemical sensor as claimed in claim 1, wherein the coupling component (K) of layer (A) consists of one or more complexing agents which react with ions.
Claim 11
Dependent Claim
20 words
A chemical sensor as claimed in claim 1, wherein layers (D) and (A) have been obtained by the Langmuir-Blodgett method.
Claim 12
Dependent Claim
119 words
A chemical sensor to be used in a solvent containing an analyte, consisting of (a) a solid substrate, (b) a layer (D) applied to the substrate and consisting essentially of at least one fluorescent compound, (c) a layer (Z) having a defined dipole moment applied to layer (D), and (d) a layer (A) applied to layer (Z) containing at least one coupling components (K) which, as a result of reacting with the analyte, gives rise to one or more specific absorption bands, at least one of which overlaps in the spectrum with the emission of the fluorescent compound of layer (D), the intermediate layer (Z) between layers (D) and (A) controlling the chemical equilibria of layers (D) and (A).
Claim 13
Dependent Claim
119 words
A chemical sensor to be used in a solvent containing an analyte, consisting of (a) a solid substrate, (b) a layer (D) applied to the substrate and consisting essentially of at least one fluorescent compound, (c) a layer (Z) having a defined dipole moment applied to layer (D), and (d) a layer (A) applied to layer (Z) containing at least one coupling components (K) which, as a result of reacting with the analyte, gives rise to one or more specific absorption bands, at least one of which overlaps in the spectrum with the emission of the fluorescent compound of layer (D), the intermediate layer (Z) between layers (D) and (A) controlling the chemical equilibria of layers (D) and (A).
Claim 14
Dependent Claim
21 words
A chemical sensor as claimed in claim 11, wherein layers (D), (A), and (Z) have been obtained by the Langmuir-Blodgett method.
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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) | 1997-03-14 | 1997-09-13 | 1998-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-14 | 2001-09-13 | 2002-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-14 | 2005-09-13 | 2006-03-15 | $7700.00 | Window Closed / Lapsed |