Patent US4957615A successfully refreshed from Google Patents.
US4957615A
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Oxygen sensor
Assignee: Terumo Corp
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Filing: 1988-08-04
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Granted: 1990-09-18
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Expires: 2008-08-04
Abstract
Abstract An oxygen sensor includes an electrically conductive substrate directly coated with an electrolytic oxidative polymeric membrane, which contains a porphyrin compound and a metal complex thereof. Also provided is an oxygen sensor capable of being subjected to a temperature calibration and including an oxygen electrode consisting of an electrically conductive substrate directly coated with a porphyrin derivative compound and a metal complex compound thereof, a reference electrode, a gelled polymeric electrolyte in which the oxygen electrode and reference electrode are immersed, and an oxygen-selective permeable membrane coating the gelled polymeric electrolyte. The electrically conductive substrate according to the present invention is formed from a material inactive with oxygen gas, such as indium tin oxide, iridium oxide, nickel or gold.
Inventors
- 👤 Norihiko Ushizawa
- 👤 Takeshi Shimomura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:16
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12; G01N27/26; G01N27/403; G01N27/404
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
62 words
An oxygen sensor comprising: an electrically conductive substrate whose potentiometric response is substantially unaffected by the presence of oxygen gas; and an electrolytic oxidative polymeric membrane adherently and substantially uniformly coating a surface of said electrically conductive substrate, said electrolytic oxidative polymeric membrane being formed by electrolytic polymerization and comprising at least one substance selected from porphyrin compounds and metal complexes thereof.
Claim 2
Dependent Claim
62 words
An oxygen sensor comprising: an electrically conductive substrate whose potentiometric response is substantially unaffected by the presence of oxygen gas; and an electrolytic oxidative polymeric membrane adherently and substantially uniformly coating a surface of said electrically conductive substrate, said electrolytic oxidative polymeric membrane being formed by electrolytic polymerization and comprising at least one substance selected from porphyrin compounds and metal complexes thereof.
Claim 3
Dependent Claim
27 words
The oxygen sensor according to claim 1, wherein said electrically conductive substrate is selected from among electrically conductive carbon, indium tin oxide, iridium oxide, nickel or gold.
Claim 4
Dependent Claim
42 words
The oxygen sensor according to claim 1, wherein said porphyrin compound is selected from porphyrin compounds in which a hydroxy aromatic derivative is substituted at the meso-position and a porphyrin compound in which an amino aromatic derivative is substituted at the meso-position.
Claim 5
Dependent Claim
47 words
The oxygen sensor according to claim 1, wherein said metal complex of the porphyrin compound is selected from metallo-porphyrin complexes in which a hydroxy aromatic derivative is substituted at the meso-position and a porphyrin metal complex in which an amino aromatic derivative is substituted at the meso-position.
Claim 6
Dependent Claim
27 words
The oxygen sensor according to claim 1, wherein said complex-forming metal of porphyrin complex is a metal selected from the group consisting of Fe, Co and Ni.
Claim 7
Dependent Claim
35 words
The oxygen sensor according to claim 1, wherein said complex-forming metal of porphyrin complex is selected from the group consisting of titanium, vanadium, chromium, manganese, copper, ruthenium, rhodium, palladium, iridium, silver, gold, zinc and tin.
Claim 8
Dependent Claim
76 words
An oxygen sensor comprising: an electrically conductive substrate whose potentiometric response is substantially unaffected by the presence of oxygen gas; and an electrolytic oxidative polymeric membrane coating a surface of said electrically conductive substrate, said electrolytic oxidative polymeric membrane comprising at least one substance selected from porphyrin compounds in which a hydroxy aromatic moiety is substituted at the meso-position, porphyrin compounds in which an amino aromatic moiety is substituted at the meso-position, and metal complexes thereof.
Claim 9
Dependent Claim
76 words
An oxygen sensor comprising: an electrically conductive substrate whose potentiometric response is substantially unaffected by the presence of oxygen gas; and an electrolytic oxidative polymeric membrane coating a surface of said electrically conductive substrate, said electrolytic oxidative polymeric membrane comprising at least one substance selected from porphyrin compounds in which a hydroxy aromatic moiety is substituted at the meso-position, porphyrin compounds in which an amino aromatic moiety is substituted at the meso-position, and metal complexes thereof.
Claim 10
Dependent Claim
79 words
An oxygen sensor comprising: an electrically conductive substrate whose potentiometric response is substantially unaffected by the presence of oxygen gas; and an electrolytic oxidative polymeric membrane coating a surface of said electrically conductive substrate, said electrolytic oxidative polymeric membrane comprising at least one substance selected from porphyrin compounds and metal complexes thereof, wherein the complex-forming metal is a transition metal selected from the group consisting of titanium, vanadium, chromium, manganese, copper, ruthenium, rhodium, palladium, iridium, platinum, silver and gold.
Claim 11
Dependent Claim
79 words
An oxygen sensor comprising: an electrically conductive substrate whose potentiometric response is substantially unaffected by the presence of oxygen gas; and an electrolytic oxidative polymeric membrane coating a surface of said electrically conductive substrate, said electrolytic oxidative polymeric membrane comprising at least one substance selected from porphyrin compounds and metal complexes thereof, wherein the complex-forming metal is a transition metal selected from the group consisting of titanium, vanadium, chromium, manganese, copper, ruthenium, rhodium, palladium, iridium, platinum, silver and gold.
References Cited (Backward Citations)
US4198851A
Cited
US4615954A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-09-17 | 1994-03-19 | 1994-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-17 | 1998-03-19 | 1998-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-17 | 2002-03-19 | 2002-09-18 | $7700.00 | Window Closed / Lapsed |