US4849180A
Expired / Lapsed
US
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Alcohol selective gas sensor
Assignee: New Cosmos Electric Co Ltd
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Filing: 1987-10-05
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Granted: 1989-07-18
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Expires: 2007-10-05
Abstract
Abstract An alcohol selective gas sensor including a detecting electrode and a semiconductor detecting element in contact with the detecting electrode, the semiconductor detecting element comprising tin oxide (SnO 2 ) and a metal oxide of at least one of alkaline earth metals (Be, Mg, Ca, Sr, Ba) carried by the tin oxide, the metal oxide being contained in an amount of about 0.5 mol % or above.
Inventors
- 👤 Kiyoshi Fukui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:28
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12; Y; Y10; Y10T; Y10T436/00; Y10T436/20; Y10T436/203332; Y10T436/204165
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
74 words
An alcohol selective gas sensor including a detecting electrode and a semiconductor detecting element in contact with the detecting electrode, said semiconductor detecting element comprising approximately 75 to 99.5 mol % of tin oxide SnO 2 and a metal oxide of at least one of alkaline earth metals, (Be, Mg, Ca, Sr, Ba) carried by the tin oxide, said metal oxide being contained in an amount ranging from about 0.5 to 25 mol %.
Claim 2
Dependent Claim
74 words
An alcohol selective gas sensor including a detecting electrode and a semiconductor detecting element in contact with the detecting electrode, said semiconductor detecting element comprising approximately 75 to 99.5 mol % of tin oxide SnO 2 and a metal oxide of at least one of alkaline earth metals, (Be, Mg, Ca, Sr, Ba) carried by the tin oxide, said metal oxide being contained in an amount ranging from about 0.5 to 25 mol %.
Claim 3
Dependent Claim
24 words
An alcohol selective gas sensor as defined in claim 1 wherein said metal oxide is contained in an amount exceeding about 3 mol %.
Claim 4
Dependent Claim
22 words
An alcohol selective gas sensor as defined in claim 2 wherein said metal oxide is selected from magnesium oxide and calcium oxide.
Claim 5
Dependent Claim
23 words
An alcohol selective gas sensor as defined in claim 2 wherein said metal oxide is a mixture of magnesium oxide and calcium oxide.
Claim 6
Dependent Claim
24 words
An alcohol selective gas sensor as defined in claim 4 wherein said magnesium oxide and calcium oxide are contained in a substantially equal amount.
References Cited (Backward Citations)
US3865550A
Cited
US3953173A
Cited
US4015230A
Cited
US4242303A
Cited
JPS57118151A
Cited
JPS58168949A
Cited
JPS58189546A
Cited
US4453151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |