US4568518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensor element for fluorescence-optical measurement
Assignee: Avl AG
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Filing: 1983-12-02
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Granted: 1986-02-04
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Expires: 2003-12-02
Abstract
Abstract Fluorescence-optical indicator material is chemically bonded in a network structure permeating a carrier membrane of the sensor element. As this network structure is independent of the membrane and not chemically bonded thereto, the properties of the membrane and the indicator are not affected by the immobilization.
Inventors
- 👤 Otto Wolfbeis
- 👤 Herbert Kroneis
- 👤 Helmut Offenbacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:33
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/62; G01N21/63; G01N21/64; G01N21/6428; G01N21/75; G01N21/77; G01N21/78; G01N21/80
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
46 words
A flexible sensor element useful in making fluorescence-optical measurements, said sensor element comprising a carrier membrane and an immobilized network structure integrated within said carrier membrane, said immobilized network structure including a fluorescent indicator material, said fluorescent indicator material being non-chemically bonded to said carrier membrane.
Claim 2
Dependent Claim
46 words
A flexible sensor element useful in making fluorescence-optical measurements, said sensor element comprising a carrier membrane and an immobilized network structure integrated within said carrier membrane, said immobilized network structure including a fluorescent indicator material, said fluorescent indicator material being non-chemically bonded to said carrier membrane.
Claim 3
Dependent Claim
16 words
A flexible sensor element as defined in claim 1, wherein said carrier membrane consists of cellulose.
Claim 4
Dependent Claim
29 words
A flexible sensor element as defined in claim 1, wherein said flexible sensor element consists of said carrier membrane and said immobilized network structure integrated within said carrier membrane.
Claim 5
Dependent Claim
112 words
A flexible sensor element useful in making fluorescence-optical measurements, said sensor element comprising a carrier membrane and an immobilized network structure extending within said carrier membrane, said immobilized network structure including a fluorescent indicator material, said fluorescent indicator material being non-chemically bonded to said carrier membrane, said flexible sensor element being made by the steps of (a) providing a carrier membrane, (b) soaking said carrier membrane in a solution of cross-linking material until said carrier membrane is permeated with said cross-linking material, (c) adding a fluorescent indicator material to said carrier membrane in step (b), and (d) allowing said network structure containing said fluorescent indicator material to form within said carrier membrane.
Claim 6
Dependent Claim
112 words
A flexible sensor element useful in making fluorescence-optical measurements, said sensor element comprising a carrier membrane and an immobilized network structure extending within said carrier membrane, said immobilized network structure including a fluorescent indicator material, said fluorescent indicator material being non-chemically bonded to said carrier membrane, said flexible sensor element being made by the steps of (a) providing a carrier membrane, (b) soaking said carrier membrane in a solution of cross-linking material until said carrier membrane is permeated with said cross-linking material, (c) adding a fluorescent indicator material to said carrier membrane in step (b), and (d) allowing said network structure containing said fluorescent indicator material to form within said carrier membrane.
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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) | 1989-02-03 | 1989-08-05 | 1990-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-03 | 1993-08-05 | 1994-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-03 | 1997-08-05 | 1998-02-04 | $7700.00 | Window Closed / Lapsed |