US5511547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state sensors
Assignee: TGC RESEARCH Ltd
•
Filing: 1994-02-16
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Granted: 1996-04-30
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Expires: 2014-02-16
Abstract
Abstract A stabilized bio-inert sensor for the determination of an analyte, especially pO 2 , pCO 2 and pH, in a medium which comprises a chemical indicator sensitive to the analyte in association with a stabilizing substrate formed from a polymer which is inert to the medium and analyte and does not affect the sensitivity of the indicator, which polymer is a cross-linked, solid silicone rubber formed from a silicone carbinol having a molecular structure compatible with said indicator.
Inventors
- 👤 David R. Markle
- 👤 Misa V. Jovanovic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:43
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; G01N31/223; G01N31/225; C; C08; C08K; C08K5/00; C08K5/0008; C08K5/0041; G01N21/00; G01N21/75; G01N21/77; G01N21/78; G01N21/783; G01N31/221
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
70 words
A stabilized, bio-inert sensor for the determination of an analyte in a medium which comprises a chemical indicator sensitive to the analyte in association with a stabilizing substrate formed from a polymer which is inert to the medium and analyte and does not affect the sensitivity of the indicator, which polymer is a crosslinked, solid silicone rubber formed from a silicone carbinol having a molecular structure compatible with said indicator.
Claim 2
Dependent Claim
70 words
A stabilized, bio-inert sensor for the determination of an analyte in a medium which comprises a chemical indicator sensitive to the analyte in association with a stabilizing substrate formed from a polymer which is inert to the medium and analyte and does not affect the sensitivity of the indicator, which polymer is a crosslinked, solid silicone rubber formed from a silicone carbinol having a molecular structure compatible with said indicator.
Claim 3
Dependent Claim
42 words
A sensor according to claim 1, in which the polymer is a silicone carbinol homopolymer having the formula: ##STR11## wherein R is methyl or phenyl, z in an Integer from 1 to 20 and n is an integer from 2 to 500.
Claim 4
Dependent Claim
29 words
A sensor according to claim 2, in which the polymer is a methyl silicone carbinol homopolymer of the formula: ##STR12## wherein n is an integer from 2 to 500.
Claim 5
Dependent Claim
64 words
A sensor according to claim 1, in which the polymer is a carbinol siloxane copolymer having the formula: ##STR13## wherein each R is methyl or phenyl and the Rs may be the same or different, z is an integer from 1 to 20, and each of x and y is an integer wherein the sum of x and y is from 2 to 500.
Claim 6
Dependent Claim
41 words
A sensor according to claim 4, in which the polymer is a dimethyl/methyl carbinol siloxane copolymer of the formula: ##STR14## wherein each of x and y is an integer and the sum of x and y is from 2 to 500.
Claim 7
Dependent Claim
32 words
A sensor according to claim 1 for the determination of the concentration of oxygen in a liquid medium, in which the indicator is the oxygen-sensitive fluorescent indicator tris (4,7-diphenyl-1,10-phenanthroline) ruthenium (II) chloride.
Claim 8
Dependent Claim
42 words
A sensor according to claim 1 for the determination of the concentration of carbon dioxide in a liquid or gaseous medium, in which the indicator is an ionic complex of an organophilic quaternary ammonium cation and an anion of a sulfonephthalein indicator.
Claim 9
Dependent Claim
19 words
A sensor according to claim 7, in which the organophilic quartenary ammonium cation is the cation of tetraoctylammonium hydroxide.
References Cited (Backward Citations)
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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) | 1999-04-30 | 1999-10-30 | 2000-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-04-30 | 2003-10-30 | 2004-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-04-30 | 2007-10-30 | 2008-04-30 | $7700.00 | Window Closed / Lapsed |