US5453248A
Expired / Lapsed
US
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Cross-linked gas permeable membrane of a cured perfluorinated urethane polymer, and optical gas sensors fabricated therewith
Assignee: OPTICAL SENSORS FOR MEDICINE A CORP OF
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Filing: 1992-08-12
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Granted: 1995-09-26
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Expires: 2012-08-12
Abstract
Abstract An optical sensor is provided for measuring dissolved gases such as O 2 or CO 2 in a fluid sample. The sensor is formulated so as to contain a gas permeable membrane of a cured perfluorinated urethane polymer and, incorporated therein, a gas-sensitive indicator component. Methods for making and using the membrane and sensor are provided as well.
Inventors
- 👤 Alan Olstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:24
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/75; G01N21/77; G01N21/7703; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5003; C08G18/5015; C08G18/67; C08G18/671; C08G18/672; G01N2021/7706; G01N2021/772
Claims Analysis
Total Claims: 50
Claim 1
Independent Claim
103 words
A cross-linked gas permeable membrane useful in optical gas sensors for measuring O 2 or CO 2 in a fluid, comprising a polymeric matrix of a cured perfluorinated urethane polymer, the matrix having a gas-sensitive indicator component incorporated therein, wherein the cured perfluorinated urethane polymer comprises a perfluorinated urethane polymer precursor cross-linked with a cross-linking agent, and further wherein the precursor has the structural formula ##STR5## wherein Ar is a monocyclic aromatic moiety and X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure --CF 2 O), --CF 2 CF 2 O), or combinations thereof.
Claim 2
Dependent Claim
103 words
A cross-linked gas permeable membrane useful in optical gas sensors for measuring O 2 or CO 2 in a fluid, comprising a polymeric matrix of a cured perfluorinated urethane polymer, the matrix having a gas-sensitive indicator component incorporated therein, wherein the cured perfluorinated urethane polymer comprises a perfluorinated urethane polymer precursor cross-linked with a cross-linking agent, and further wherein the precursor has the structural formula ##STR5## wherein Ar is a monocyclic aromatic moiety and X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure --CF 2 O), --CF 2 CF 2 O), or combinations thereof.
Claim 3
Dependent Claim
11 words
The membrane of claim 1, wherein the cross-linking agent is water.
Claim 4
Dependent Claim
33 words
The membrane of claim 1, wherein the polymeric matrix comprises approximately 95 wt. % to 99.5 wt. % perfluorinated polyurethane polymer precursor and approximately 0.5 wt. % to 5 wt. % cross-linking agent.
Claim 5
Dependent Claim
26 words
The membrane of claim 1, wherein the gas-sensitive indicator is selected from the group consisting of fluorescein, carboxyfluorescein, seminaphthorhodafluor, seminaphthofluorescein, naphthofluorescein, hydroxypyrene trisulfonic acid and dichlorofluorescein.
Claim 6
Dependent Claim
12 words
The membrane of claim 1, wherein the cross-linking agent is a diol.
Claim 7
Dependent Claim
20 words
The membrane of claim 5, wherein the diol is selected from the group consisting of bisphenol A and hexafluorobisphenol A.
Claim 8
Dependent Claim
70 words
The membrane of claim 1, wherein the gas-sensitive indicator is selected from the group consisting of complexes of ruthenium (II), osmium (II), iridium (III), rhodium, rhenium, and chromium (III) with one of 2,2'-bipyridine, 1,10-phenanthroline, 4,7-diphenyl(1,10-phenanthroline), 4,7-dimethyl-1,10-phenanthroline, 4,7-disulfonated-diphenyl-1,10-phenanthroline, 2,2'-bi-2-thiazoline, 2,2'-bithiazole, 5-bromo-1,10-phenanthroline, and 5-chloro-1,10-phenanthroline, complexes of VO (II), Cu (II), platinum (II), and zinc (II) with one of porphin etioporphorin tetraphenylporphyrin, mesoporphyrin IX dimethylester, protoporphyrin IX dimethylester and octaethylporphyrin, and combinations thereof.
Claim 9
Dependent Claim
16 words
The membrane of claim 7, wherein the gas-sensitive indicator is physically entrapped within the polymer matrix.
Claim 10
Dependent Claim
16 words
The membrane of claim 7, wherein the gas-sensitive indicator is covalently bound to the polymer matrix.
Claim 11
Dependent Claim
120 words
A cross-linked gas permeable membrane useful in optical gas sensors for measuring O 2 or CO 2 in a fluid, comprising a polymeric matrix of a cured perfluorinated urethane polymer, the matrix having a gas-sensitive indicator component incorporated therein, wherein the cured perfluorinated urethane polymer comprises a perfluorinated urethane polymer precursor having the structural formula ##STR6## wherein Ar is a monocyclic aromatic moiety, X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure --CF 2 O), --CF 2 CF 2 O), or combinations thereof, and n is an integer in the range of 0 to 6 inclusive, and further wherein the precursor is cured with a photoinitiator in the presence of radiation.
Claim 12
Dependent Claim
120 words
A cross-linked gas permeable membrane useful in optical gas sensors for measuring O 2 or CO 2 in a fluid, comprising a polymeric matrix of a cured perfluorinated urethane polymer, the matrix having a gas-sensitive indicator component incorporated therein, wherein the cured perfluorinated urethane polymer comprises a perfluorinated urethane polymer precursor having the structural formula ##STR6## wherein Ar is a monocyclic aromatic moiety, X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure --CF 2 O), --CF 2 CF 2 O), or combinations thereof, and n is an integer in the range of 0 to 6 inclusive, and further wherein the precursor is cured with a photoinitiator in the presence of radiation.
Claim 13
Dependent Claim
70 words
The membrane of claim 10, wherein the gas-sensitive indicator is selected from the group consisting of complexes of ruthenium (II), osmium (II), iridium (III), rhodium, rhenium, and chromium (III) with one of 2,2'-bipyridine, 1,10-phenanthroline, 4,7-diphenyl(1,10-phenanthroline), 4,7-dimethyl-1,10-phenanthroline, 4,7-disulfonated-diphenyl-1,10-phenanthroline, 2,2'-bi-2-thiazoline, 2,2'-bithiazole, 5-bromo-1,10-phenanthroline, and 5-chloro-1,10-phenanthroline, complexes of VO (II), Cu (II), platinum (II), and zinc (II) with one of porphin etioporphorin tetraphenylporphyrin, mesoporphyrin IX dimethylester, protoporphyrin IX dimethylester and octaethylporphyrin, and combinations thereof.
Claim 14
Dependent Claim
16 words
The membrane of claim 11, wherein the gas-sensitive indicator is physically entrapped within the polymer matrix.
Claim 15
Dependent Claim
16 words
The membrane of claim 11, wherein the gas-sensitive indicator is covalently bound to the polymer matrix.
Claim 16
Dependent Claim
118 words
A cross-linked gas permeable membrane useful in optical gas sensors for measuring O 2 or CO 2 in a fluid, comprising a polymeric matrix of a cured perfluorinated urethane polymer, the matrix having a gas-sensitive indicator component incorporated therein, wherein the cured perfluorinated urethane polymer comprises an epoxy-terminated precursor having the structural formula ##STR7## wherein Ar is a monocyclic aromatic moiety, X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure --CF 2 O), --CF 2 CF 2 O), or combinations thereof, and n is an integer in the range of 0 to 6 inclusive, and further wherein the precursor is cured with a photoinitiator in the presence of radiation.
Claim 17
Dependent Claim
118 words
A cross-linked gas permeable membrane useful in optical gas sensors for measuring O 2 or CO 2 in a fluid, comprising a polymeric matrix of a cured perfluorinated urethane polymer, the matrix having a gas-sensitive indicator component incorporated therein, wherein the cured perfluorinated urethane polymer comprises an epoxy-terminated precursor having the structural formula ##STR7## wherein Ar is a monocyclic aromatic moiety, X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure --CF 2 O), --CF 2 CF 2 O), or combinations thereof, and n is an integer in the range of 0 to 6 inclusive, and further wherein the precursor is cured with a photoinitiator in the presence of radiation.
Claim 18
Dependent Claim
26 words
The membrane of claim 14, wherein the gas-sensitive indicator is selected from the group consisting of fluorescein, carboxyfluorescein, seminaphthorhodafluor, seminaphthofluorescein, naphthofluorescein, hydroxypyrene trisulfonic acid and dichlorofluorescein.
Claim 19
Dependent Claim
16 words
The membrane of claim 15, wherein the gas-sensitive indicator is physically entrapped within the polymer matrix.
Claim 20
Dependent Claim
16 words
The membrane of claim 15, wherein the gas-sensitive indicator is covalently bound to the polymer matrix.
Claim 21
Dependent Claim
153 words
An optical gas sensor for measuring O 2 or CO 2 in a fluid, comprising: an optical waveguide having a distal end portion for monitoring a gas component within a fluid, and a proximal end portion for communication with means for receiving a signal from the distal end portion, and wherein the distal end portion has in optical communication therewith a gas sensor means comprising a cross-linked gas permeable membrane comprising a polymeric matrix of a cured perfluorinated urethane polymer, the matrix having a gas-sensitive indicator component incorporated therein, wherein the cured perfluorinated urethane polymer comprises a perfluorinated urethane polymer precursor cross-linked with a cross-linking agent, and further wherein the precursor has the structural formula ##STR8## wherein Ar is a monocyclic aromatic moiety and X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure --CF 2 O), --CF 2 CF 2 O), or combinations thereof.
Claim 22
Dependent Claim
153 words
An optical gas sensor for measuring O 2 or CO 2 in a fluid, comprising: an optical waveguide having a distal end portion for monitoring a gas component within a fluid, and a proximal end portion for communication with means for receiving a signal from the distal end portion, and wherein the distal end portion has in optical communication therewith a gas sensor means comprising a cross-linked gas permeable membrane comprising a polymeric matrix of a cured perfluorinated urethane polymer, the matrix having a gas-sensitive indicator component incorporated therein, wherein the cured perfluorinated urethane polymer comprises a perfluorinated urethane polymer precursor cross-linked with a cross-linking agent, and further wherein the precursor has the structural formula ##STR8## wherein Ar is a monocyclic aromatic moiety and X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure --CF 2 O), --CF 2 CF 2 O), or combinations thereof.
Claim 23
Dependent Claim
12 words
The optical sensor of claim 18, wherein the cross-linking agent is water.
Claim 24
Dependent Claim
79 words
The optical sensor of claim 18, wherein the sensor is an O 2 sensor and the gas-sensitive indicator is selected from the group consisting of complexes of ruthenium (II), osmium (II), iridium (III), rhodium, rhenium, and chromium (III) with one of 2,2'-bipyridine, 1,10-phenanthroline, 4,7-diphenyl(1,10-phenanthroline), 4,7-dimethyl-1,10-phenanthroline, 4,7-disulfonated-diphenyl-1,10-phenanthroline, 2,2'-bi-2-thiazoline, 2,2'-bithiazole, 5-bromo-1,10-phenanthroline, and 5-chloro-1,10-phenanthroline, complexes of VO (II), Cu (II), platinum (II), and zinc (II) with one of porphin etioporphorin tetraphenylporphyrin, mesoporphyrin IX dimethylester, protoporphyrin IX dimethylester and octaethylporphyrin, and combinations thereof.
Claim 25
Dependent Claim
35 words
The optical sensor of claim 14, wherein the sensor is a CO 2 sensor and the gas-sensitive indicator is selected from the group consisting of fluorescein, carboxyfluorescein, seminaphthorhodafluor, seminaphthofluorescein, naphthofluorescein, hydroxypyrene trisulfonic acid and dichlorofluorescein.
Claim 26
Dependent Claim
13 words
The optical sensor of claim 18, wherein the cross-linking agent is a diol.
Claim 27
Dependent Claim
21 words
The optical sensor of claim 22, wherein the diol is selected from the group consisting of bisphenol A or hexafluorobisphenol A.
Claim 28
Dependent Claim
171 words
An optical gas sensor for measuring O 2 or CO 2 in a fluid, comprising: an optical waveguide having a distal end portion for monitoring a gas component within a fluid, and a proximal end portion for communication with means for receiving a signal from the distal end portion, and wherein the distal end portion has in optical communication therewith a gas sensor means comprising a cross-linked gas permeable membrane comprising a polymeric matrix of a cured perfluorinated urethane polymer, the matrix having a gas-sensitive indicator component incorporated therein, wherein the cured perfluorinated urethane polymer comprises a perfluorinated urethane polymer precursor having the structural formula ##STR9## wherein Ar is a monocyclic aromatic moiety and X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure --CF 2 O), --CF 2 CF 2 O), or combinations thereof, and n is an integer in the range of 0 to 6 inclusive, and further wherein the precursor is cured with a photoinitiator in the presence of radiation.
Claim 29
Dependent Claim
171 words
An optical gas sensor for measuring O 2 or CO 2 in a fluid, comprising: an optical waveguide having a distal end portion for monitoring a gas component within a fluid, and a proximal end portion for communication with means for receiving a signal from the distal end portion, and wherein the distal end portion has in optical communication therewith a gas sensor means comprising a cross-linked gas permeable membrane comprising a polymeric matrix of a cured perfluorinated urethane polymer, the matrix having a gas-sensitive indicator component incorporated therein, wherein the cured perfluorinated urethane polymer comprises a perfluorinated urethane polymer precursor having the structural formula ##STR9## wherein Ar is a monocyclic aromatic moiety and X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure --CF 2 O), --CF 2 CF 2 O), or combinations thereof, and n is an integer in the range of 0 to 6 inclusive, and further wherein the precursor is cured with a photoinitiator in the presence of radiation.
Claim 30
Dependent Claim
79 words
The optical sensor of claim 24, wherein the sensor is an O 2 sensor and the gas-sensitive indicator is selected from the group consisting of complexes of ruthenium (II), osmium (II), iridium (III), rhodium, rhenium, and chromium (III) with one of 2,2'-bipyridine, 1,10-phenanthroline, 4,7-diphenyl(1,10-phenanthroline), 4,7-dimethyl-1,10-phenanthroline, 4,7-disulfonated-diphenyl-1,10-phenanthroline, 2,2'-bi-2-thiazoline, 2,2'-bithiazole, 5-bromo-1,10-phenanthroline, and 5-chloro-1,10-phenanthroline, complexes of VO (II), Cu (II), platinum (II), and zinc (II) with one of porphin etioporphorin tetraphenylporphyrin, mesoporphyrin IX dimethylester, protoporphyrin IX dimethylester and octaethylporphyrin, and combinations thereof.
Claim 31
Dependent Claim
35 words
The optical sensor of claim 24, wherein the sensor is a CO 2 sensor and the gas-sensitive indicator is selected from the group consisting of fluorescein, carboxyfluorescein, seminaphthorhodafluor, seminaphthofluorescein, naphthofluorescein, hydroxypyrene trisulfonic acid and dichlorofluorescein.
Claim 32
Dependent Claim
167 words
An optical gas sensor for measuring O 2 or CO 2 in a fluid, comprising: an optical waveguide having a distal end portion for monitoring a gas component within a fluid, and a proximal end portion for communication with means for receiving a signal from the distal end portion, and wherein the distal end portion has in optical communication therewith a gas sensor means comprising a cross-linked gas permeable membrane comprising a polymeric matrix of a cured perfluorinated urethane polymer, the matrix having a gas-sensitive indicator component incorporated therein, wherein the cured perfluorinated urethane polymer comprises an epoxy-terminated precursor having the structural formula ##STR10## wherein Ar is a monocyclic aromatic moiety, X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure --CF 2 O), --CF 2 CF 2 O), or combinations thereof, and n is an integer in the range of 0 to 6 inclusive, and further wherein the precursor is cured with photoinitiator in the presence of radiation.
Claim 33
Dependent Claim
167 words
An optical gas sensor for measuring O 2 or CO 2 in a fluid, comprising: an optical waveguide having a distal end portion for monitoring a gas component within a fluid, and a proximal end portion for communication with means for receiving a signal from the distal end portion, and wherein the distal end portion has in optical communication therewith a gas sensor means comprising a cross-linked gas permeable membrane comprising a polymeric matrix of a cured perfluorinated urethane polymer, the matrix having a gas-sensitive indicator component incorporated therein, wherein the cured perfluorinated urethane polymer comprises an epoxy-terminated precursor having the structural formula ##STR10## wherein Ar is a monocyclic aromatic moiety, X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure --CF 2 O), --CF 2 CF 2 O), or combinations thereof, and n is an integer in the range of 0 to 6 inclusive, and further wherein the precursor is cured with photoinitiator in the presence of radiation.
Claim 34
Dependent Claim
77 words
The optical sensor of claim 27, wherein the sensor is an O 2 sensor and the gas-sensitive indicator is selected from the group consisting of complexes of ruthenium (II), osmium (II), iridium (III), rhodium, rhenium, and chromium (III) with one of 2,2'-bipyridine, 1,10-phenanthroline, 4,7-diphenyl(1,10-phenanthroline), 4,7-dimethyl-1,10-phenanthroline, 4,7-disulfonated-diphenyl-1,10-phenanthroline, 2,2'-bi-2-thiazoline, 2,2'-bithiazole, 5-bromo-1,10-phenanthroline, and 5-chloro-1,10-phenanthroline, complexes of VO (II), Cu (II), platinum (II), and zinc (II) with porphin etioporphorin tetraphenylporphyrin, mesoporphyrin IX dimethylester, protoporphyrin IX dimethylester and octaethylporphyrin, and combinations thereof.
Claim 35
Dependent Claim
35 words
The optical sensor of claim 27, wherein the sensor is a CO 2 sensor and the gas-sensitive indicator is selected from the group consisting of fluorescein, carboxyfluorescein, seminaphthorhodafluor, seminaphthofluorescein, naphthofluorescein, hydroxypyrene trisulfonic acid and dichlorofluorescein.
Claim 36
Independent Claim
160 words
A method for making an optical gas sensor for measuring O 2 or CO 2 in a fluid, comprising the steps of: (a) providing an optical waveguide having a distal end portion for monitoring a gas component within a fluid, and a proximal end portion for communication with means for receiving a signal from said distal end portion; (b) coating said distal end portion with a solution containing a photocurable polymeric precursor, which precursor has the structural formula ##STR11## wherein Ar is a monocyclic aromatic moiety, X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure --CF 2 O), --CF 2 CF 2 O), or combinations thereof, and n is an integer in the range of 0 to 6 inclusive, and a gas-sensitive indicator component; and (c) effecting cross-linking of the precursor by irradiating the distal end portion through the optical waveguide using radiation of a wavelength effective to cure the precursor.
Claim 37
Independent Claim
160 words
A method for making an optical gas sensor for measuring O 2 or CO 2 in a fluid, comprising the steps of: (a) providing an optical waveguide having a distal end portion for monitoring a gas component within a fluid, and a proximal end portion for communication with means for receiving a signal from said distal end portion; (b) coating said distal end portion with a solution containing a photocurable polymeric precursor, which precursor has the structural formula ##STR11## wherein Ar is a monocyclic aromatic moiety, X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure --CF 2 O), --CF 2 CF 2 O), or combinations thereof, and n is an integer in the range of 0 to 6 inclusive, and a gas-sensitive indicator component; and (c) effecting cross-linking of the precursor by irradiating the distal end portion through the optical waveguide using radiation of a wavelength effective to cure the precursor.
Claim 38
Independent Claim
185 words
A method for making an optical sensor for measuring O 2 or CO 2 in a fluid, comprising the steps of: (a) providing an optical waveguide having a distal end portion for monitoring a gas component within a fluid, and a proximal end portion for communication with means for receiving a signal from said distal end portion; (b) coating said distal end portion with a solution containing a perfluorinated urethane polymer precursor and a gas-sensitive indicator component, to provide a precursor-coated tip; and (c) effecting cross-linking of said precursor, thereby providing at the distal end portion a gas sensor means comprising a cross-linked gas permeable membrane of a cured perfluorinated urethane polymer, the membrane having said gas-sensitive indicator component incorporated therein, wherein the cured perfluorinated urethane polymer comprises said perfluorinated urethane polymer precursor cross-linked with a cross-linking agent, and further wherein the precursor has the structural formula ##STR12## wherein Ar is a monocyclic aromatic moiety and X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure --CF 2 O), --CF 2 CF 2 O), or combinations thereof.
Claim 39
Independent Claim
185 words
A method for making an optical sensor for measuring O 2 or CO 2 in a fluid, comprising the steps of: (a) providing an optical waveguide having a distal end portion for monitoring a gas component within a fluid, and a proximal end portion for communication with means for receiving a signal from said distal end portion; (b) coating said distal end portion with a solution containing a perfluorinated urethane polymer precursor and a gas-sensitive indicator component, to provide a precursor-coated tip; and (c) effecting cross-linking of said precursor, thereby providing at the distal end portion a gas sensor means comprising a cross-linked gas permeable membrane of a cured perfluorinated urethane polymer, the membrane having said gas-sensitive indicator component incorporated therein, wherein the cured perfluorinated urethane polymer comprises said perfluorinated urethane polymer precursor cross-linked with a cross-linking agent, and further wherein the precursor has the structural formula ##STR12## wherein Ar is a monocyclic aromatic moiety and X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure --CF 2 O), --CF 2 CF 2 O), or combinations thereof.
Claim 40
Dependent Claim
19 words
The method of claim 31, wherein cross-linking is carried out by contacting the precursor-coated tip with a cross-linking agent.
Claim 41
Independent Claim
160 words
A method for making an optical gas sensor for measuring O 2 or CO 2 in a fluid, comprising the steps of: (a) providing an optical waveguide having a distal end portion for monitoring a gas component within a fluid, and a proximal end portion for communication with means for receiving a signal from said distal end portion; (b) coating said distal end portion with a solution containing a photocurable polymeric precursor, which precursor having the structural formula ##STR13## wherein Ar is a monocyclic aromatic moiety, X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure --CF 2 O), --CF 2 CF 2 O), or combinations thereof, and n is an integer in the range of 0 to 6 inclusive, and a gas-sensitive indicator component; and (c) effecting cross-linking of the precursor by irradiating the distal end portion through the optical waveguide using radiation of a wavelength effective to cure the precursor.
Claim 42
Independent Claim
160 words
A method for making an optical gas sensor for measuring O 2 or CO 2 in a fluid, comprising the steps of: (a) providing an optical waveguide having a distal end portion for monitoring a gas component within a fluid, and a proximal end portion for communication with means for receiving a signal from said distal end portion; (b) coating said distal end portion with a solution containing a photocurable polymeric precursor, which precursor having the structural formula ##STR13## wherein Ar is a monocyclic aromatic moiety, X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure --CF 2 O), --CF 2 CF 2 O), or combinations thereof, and n is an integer in the range of 0 to 6 inclusive, and a gas-sensitive indicator component; and (c) effecting cross-linking of the precursor by irradiating the distal end portion through the optical waveguide using radiation of a wavelength effective to cure the precursor.
Claim 43
Independent Claim
196 words
A method for making an optical sensor for measuring O 2 or CO 2 in a fluid, comprising the steps of: (a) providing an optical waveguide having a distal end portion for monitoring a gas component within a fluid, and a proximal end portion for communication with means for receiving a signal from said distal end portion; (b) coating said distal end portion with a solution containing a perfluorinated urethane polymer precursor and a gas-sensitive indicator component, to provide a precursor-coated tip; and (c) effecting cross-linking of said precursor, thereby providing at the distal end portion a gas sensor means comprising a cross-linked gas permeable membrane of a cured perfluorinated urethane polymer, the membrane having said gas-sensitive indicator component incorporated therein, wherein said perfluorinated urethane polymer precursor has the structural formula ##STR14## wherein Ar is a monocyclic aromatic moiety, X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure --CF 2 O), --CF 2 CF 2 O), or combinations thereof, and n is an integer in the range of 0 to 6 inclusive, and further wherein the precursor is cured with a photoinitiator in the presence of radiation.
Claim 44
Independent Claim
196 words
A method for making an optical sensor for measuring O 2 or CO 2 in a fluid, comprising the steps of: (a) providing an optical waveguide having a distal end portion for monitoring a gas component within a fluid, and a proximal end portion for communication with means for receiving a signal from said distal end portion; (b) coating said distal end portion with a solution containing a perfluorinated urethane polymer precursor and a gas-sensitive indicator component, to provide a precursor-coated tip; and (c) effecting cross-linking of said precursor, thereby providing at the distal end portion a gas sensor means comprising a cross-linked gas permeable membrane of a cured perfluorinated urethane polymer, the membrane having said gas-sensitive indicator component incorporated therein, wherein said perfluorinated urethane polymer precursor has the structural formula ##STR14## wherein Ar is a monocyclic aromatic moiety, X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure --CF 2 O), --CF 2 CF 2 O), or combinations thereof, and n is an integer in the range of 0 to 6 inclusive, and further wherein the precursor is cured with a photoinitiator in the presence of radiation.
Claim 45
Dependent Claim
20 words
The method of claim 34, wherein cross-linking is carried out by irradiating the distal end portion of the optical waveguide.
Claim 46
Dependent Claim
14 words
The method of claim 34, wherein the irradiating is effected through the optical waveguide.
Claim 47
Independent Claim
197 words
A method for making an optical sensor for measuring O 2 or CO 2 in a fluid, comprising the steps of: (a) providing an optical waveguide having a distal end portion for monitoring a gas component within a fluid, and a proximal end portion for communication with means for receiving a signal from said distal end portion; (b) coating said distal end portion with a solution containing a perfluorinated urethane polymer precursor and a gas-sensitive indicator component, to provide a precursor-coated tip; and (c) effecting cross-linking of said precursor, thereby providing at the distal end portion a gas sensor means comprising a cross-linked gas permeable membrane of a cured perfluorinated urethane polymer, the membrane having said gas-sensitive indicator component incorporated therein, wherein the precursor is an epoxy-terminated precursor having the structural formula ##STR15## wherein Ar is a monocyclic aromatic moiety, X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure --CF 2 O), --CF 2 CF 2 O), or combinations thereof, and n is an integer in the range of 0 to 6 inclusive, and further wherein the precursor is cured with a photoinitiator in the presence of radiation.
Claim 48
Independent Claim
197 words
A method for making an optical sensor for measuring O 2 or CO 2 in a fluid, comprising the steps of: (a) providing an optical waveguide having a distal end portion for monitoring a gas component within a fluid, and a proximal end portion for communication with means for receiving a signal from said distal end portion; (b) coating said distal end portion with a solution containing a perfluorinated urethane polymer precursor and a gas-sensitive indicator component, to provide a precursor-coated tip; and (c) effecting cross-linking of said precursor, thereby providing at the distal end portion a gas sensor means comprising a cross-linked gas permeable membrane of a cured perfluorinated urethane polymer, the membrane having said gas-sensitive indicator component incorporated therein, wherein the precursor is an epoxy-terminated precursor having the structural formula ##STR15## wherein Ar is a monocyclic aromatic moiety, X is a perfluorinated polyether linkage containing approximately 2 to 100 recurring perfluorinated mer units having the structure --CF 2 O), --CF 2 CF 2 O), or combinations thereof, and n is an integer in the range of 0 to 6 inclusive, and further wherein the precursor is cured with a photoinitiator in the presence of radiation.
Claim 49
Dependent Claim
20 words
The method of claim 37, wherein cross-linking is carried out by irradiating the distal end portion of the optical waveguide.
Claim 50
Dependent Claim
14 words
The method of claim 37, wherein the irradiating is effected through the optical waveguide.
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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) | 1998-09-25 | 1999-03-27 | 1999-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-09-25 | 2003-03-27 | 2003-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-09-25 | 2007-03-27 | 2007-09-26 | $7700.00 | Window Closed / Lapsed |