Patent US4752115A successfully refreshed from Google Patents.
US4752115A
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US
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Optical sensor for monitoring the partial pressure of oxygen
Assignee: Becton Dickinson Critical Care Systems Pte Ltd
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Filing: 1985-02-07
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Granted: 1988-06-21
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Expires: 2005-02-07
Abstract
Abstract A device is described for sensing oxygen, particularly for use in medical applications. The device includes an optical waveguide and an oxygen sensing medium disposed on the waveguide. The sensing medium fluoresces in response to light from a light source such that the intensity of fluorescence is dependent on the partial pressure of oxygen in the environment. The sensing medium includes an oxygen sensitive fluorescent dye in a matrix consisting of a plasticized polymer.
Inventors
- 👤 Richard C. Murray, Jr.
- 👤 Steven M. Lefkowitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:56
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/06; G; G01; G01N; G01N21/00; G01N21/62; G01N21/63; G01N21/64; G01N21/6428; G01N21/75; G01N21/77; G01N21/7703; G01N2021/6432; G01N2021/7769; G01N2021/7786
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
87 words
A device for monitoring oxygen in an environmental in response to light transmitted from a light source comprising: an optical waveguide to receive light transmitted from the light source; and a coating of oxygen-sensitive medium disposed on said waveguide wherein said sensitive medium fluoresces in response to light from said light source, the intensity of fluorescence of said sensitive medium being dependent on the partial pressure of oxygen present in the environment being monitored, said sensitive-medium including an inorganic oxygen-sensitive fluorescent dye in a plasticized polymer matrix.
Claim 2
Independent Claim
87 words
A device for monitoring oxygen in an environmental in response to light transmitted from a light source comprising: an optical waveguide to receive light transmitted from the light source; and a coating of oxygen-sensitive medium disposed on said waveguide wherein said sensitive medium fluoresces in response to light from said light source, the intensity of fluorescence of said sensitive medium being dependent on the partial pressure of oxygen present in the environment being monitored, said sensitive-medium including an inorganic oxygen-sensitive fluorescent dye in a plasticized polymer matrix.
Claim 3
Dependent Claim
20 words
A device for monitoring oxygen as recited in claim 1, wherein: said plasticized polymer includes at least twenty-five percent plasticizer.
Claim 4
Dependent Claim
20 words
A device for monitoring oxygen as recited in claim 2, wherein: said oxygen-sensitive fluorescent dye includes tris (4,7-diphenyl-1,10-phenanthroline) Ru(II) perchlorate.
Claim 5
Dependent Claim
27 words
A device for monitoring oxygen as recited in claim 2, wherein: said oxygen-sensitive fluorescent dye is formed of any oxygen-responsive fluorescent salt of tris (4,7-diphenyl-1,10-phenanthroline) Ru(II) cation.
Claim 6
Dependent Claim
35 words
A device for monitoring oxygen as recited in claim 2, wherein: said oxygen-sensitive fluorescent dye is made of any oxygen-responsive, fluorescent salt of a transition metal complex having as a ligand a derivative of 1,10-phenanthroline.
Claim 7
Dependent Claim
32 words
A device for monitoring oxygen as recited in claim 2, wherein: said oxygen-sensitive fluorescent dye is made of any oxygen-responsive, fluorescent salt of a transition metal complex having as a ligand 1,10-phenanthroline.
Claim 8
Dependent Claim
30 words
A device for monitoring oxygen as recited in claim 5, wherein: said transition-metal complex is selected from the group consisting of ruthenium (II), osmium (II), rhodium (III) and iridium (III).
Claim 9
Dependent Claim
23 words
A device for monitoring oxygen as recited in claim 2, wherein: said plasticized polymer is formed of polyvinyl chloride plasticized with didecyl phthalate.
Claim 10
Dependent Claim
21 words
A device for monitoring oxygen as recited in claim 8, wherein: said plasticized polymer includes fifty weight percent of didecyl phthalate.
Claim 11
Dependent Claim
29 words
A device for monitoring oxygen as recited in claim 2, wherein: said plasticized polymer is plasticized with a derivative of phthalic acid, said derivative being compatible with said polymer.
Claim 12
Dependent Claim
38 words
A device for monitoring oxygen as recited in claim 2, wherein: said plasticized polymer includes a plasticizer selected from the group of materials consisting of phthalic acid derivatives, citric acid derivatives, adipic acid derivatives, and sebacic acid derivatives.
Claim 13
Dependent Claim
36 words
A device for monitoring oxygen as recited in claim 2, wherein: said plasticized polymer includes a polymer selected from the group of materials consisting of polyvinyl chloride, polystyrene, polyurethane, polyvinyl butyral, polymethyl methacrylate and silicone rubber.
Claim 14
Dependent Claim
52 words
A device for monitoring oxygen as recited in claim 1, wherein: said waveguide is a fiber optic waveguide having a core surrounded by a cladding, a portion of said cladding being removed from said waveguide to expose a portion of said core, said oxygen sensing medium being disposed on said exposed core.
Claim 15
Dependent Claim
46 words
A device for monitoring oxygen as recited in claim 1, wherein: said waveguide is a fiber-optic waveguide having first and second ends, said oxygen-sensing medium being disposed on said first end of said waveguide, said light source being disposed at said second end of said waveguide.
Claim 16
Dependent Claim
73 words
A device for monitoring oxygen as recited in claim 1, wherein: said waveguide is a fiber-optic waveguide having a core surrounded by a cladding and having first and second ends, said light source being disposed at said second end of said waveguide, said first end of said waveguide terminating in an acute angle exposing an elongated portion of said core, said oxygen sensing medium being disposed on said elongated portion of said core.
Claim 17
Dependent Claim
20 words
A device for monitoring oxygen as recited in claim 15, wherein: said acute angle is less than about sixty degrees.
Claim 18
Dependent Claim
21 words
A device for monitoring oxygen as recited in claim 15, wherein: said angle is between about twenty and about thirty degrees.
Claim 19
Dependent Claim
23 words
A device as recited in claim 1, further comprising: a sleeve surrounding said waveguide, said sleeve being formed of a gas-permeable, solution-impermeable membrane.
Claim 20
Independent Claim
99 words
A device for monitoring oxygen as comprising: an acrylic optical fiber, having a generally cylindrical core surrounded by a cladding, said fiber having first and second ends, said first end terminating in an acute angle of between about twenty degrees and about thirty degrees to expose an elongated portion of said core; and an oxygen-sensing medium composed of tris (4,7-diphenyl-1,10-phenanthroline) (RuII) perchlorate dye in a matrix of polyvinyl chloride and didecyl phthalate, said matrix consisting of fifty-weight-percent didecyl phthalate, said matrix being saturated with said dye, said oxygen sensing medium being disposed on said exposed portion of said core.
Claim 21
Independent Claim
99 words
A device for monitoring oxygen as comprising: an acrylic optical fiber, having a generally cylindrical core surrounded by a cladding, said fiber having first and second ends, said first end terminating in an acute angle of between about twenty degrees and about thirty degrees to expose an elongated portion of said core; and an oxygen-sensing medium composed of tris (4,7-diphenyl-1,10-phenanthroline) (RuII) perchlorate dye in a matrix of polyvinyl chloride and didecyl phthalate, said matrix consisting of fifty-weight-percent didecyl phthalate, said matrix being saturated with said dye, said oxygen sensing medium being disposed on said exposed portion of said core.
Claim 22
Dependent Claim
23 words
A device as recited in claim 19, further comprising: a gas permeable, solution impermeable membrane disposed about said fiber and said sensing medium.
Claim 23
Independent Claim
72 words
A method for forming an oxygen sensor comprising the steps of: immersing an elongated portion of an exposed optical fiber core in an oxygen sensing medium dissolved in a volatile solvent, said solvent being unable to dissolve said fiber, and said elongated portion terminating in an acute angle of less than about sixty degrees; and allowing said solvent to evaporate to cause said oxygen sensing medium to dry to a solid phase.
Claim 24
Independent Claim
72 words
A method for forming an oxygen sensor comprising the steps of: immersing an elongated portion of an exposed optical fiber core in an oxygen sensing medium dissolved in a volatile solvent, said solvent being unable to dissolve said fiber, and said elongated portion terminating in an acute angle of less than about sixty degrees; and allowing said solvent to evaporate to cause said oxygen sensing medium to dry to a solid phase.
Claim 25
Dependent Claim
29 words
A method for forming an oxygen sensor as recited in claim 21 further comprising the step of: forming a gas-permeable, solution-impermeable membrane about said fiber and said sensing medium.
Claim 26
Independent Claim
77 words
A device for monitoring oxygen in an environment in response to light transmitted from a light source comprising: a fiber-optic waveguide having a core surrounded by a cladding and having first and second ends, said light source being disposed at said second end of said waveguide, said first end of said waveguide terminating in an acute angle exposing an elongated portion of said core, said oxygen sensing medium being disposed on said elongated portion of said core.
Claim 27
Independent Claim
77 words
A device for monitoring oxygen in an environment in response to light transmitted from a light source comprising: a fiber-optic waveguide having a core surrounded by a cladding and having first and second ends, said light source being disposed at said second end of said waveguide, said first end of said waveguide terminating in an acute angle exposing an elongated portion of said core, said oxygen sensing medium being disposed on said elongated portion of said core.
Claim 28
Dependent Claim
20 words
A device for monitoring oxygen as recited in claim 23, wherein: said acute angle is less than about sixty degrees.
Claim 29
Dependent Claim
22 words
A device for monitoring oxygen as recited in claim 23, wherein: said angle is between about twenty degrees and about thirty degrees.
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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) | 1991-06-21 | 1991-12-21 | 1992-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-21 | 1995-12-21 | 1996-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-21 | 1999-12-21 | 2000-06-21 | $7700.00 | Window Closed / Lapsed |