Patent US4322968A successfully refreshed from Google Patents.
US4322968A
Expired / Lapsed
US
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Temperature compensated plug-in type oxygen detector for exhaust gas
Assignee: Niterra Co Ltd
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Filing: 1980-02-25
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Granted: 1982-04-06
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Expires: 2000-02-25
Abstract
Abstract A plug-in type oxygen detector for detecting oxygen contained in exhaust gas is disclosed which comprises a series connected, sintered N and P type oxide semiconductors which have temperature dependencies in the same direction and respond to a partial pressure of oxygen in exhaust gas, an output being derived from a common junction of the semiconductors.
Inventors
- 👤 Akio Takami
- 👤 Toshitaka Matsuura
- 👤 Tsutomu Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:22
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
102 words
A plug-in type, temperature-compensated oxygen detector for detecting oxygen contained in exhaust gas comprising an N type sintered single oxide semiconductor pellet, a P type sintered single-oxide semiconductor pellet, said N type semiconductor and said P type semiconductor having temperature dependencies in the same direction, a ceramic column body for fixedly supporting at one end thereof said N type semiconductor pellet and said P type semiconductor pellet, means for connecting said N type semiconductor and said P type semiconductor in series and providing output terminals at the other end thereof, and a metal housing for fixedly supporting said ceramic column body therein.
Claim 2
Dependent Claim
102 words
A plug-in type, temperature-compensated oxygen detector for detecting oxygen contained in exhaust gas comprising an N type sintered single oxide semiconductor pellet, a P type sintered single-oxide semiconductor pellet, said N type semiconductor and said P type semiconductor having temperature dependencies in the same direction, a ceramic column body for fixedly supporting at one end thereof said N type semiconductor pellet and said P type semiconductor pellet, means for connecting said N type semiconductor and said P type semiconductor in series and providing output terminals at the other end thereof, and a metal housing for fixedly supporting said ceramic column body therein.
Claim 3
Dependent Claim
45 words
The oxygen detector claimed in claim 1, wherein said ceramic column body is formed at said one end thereof with a recess in which said N type semiconductor pellet and said P type semiconductor pellet are fixedly supported by using a heat resistant inorganic cement.
Claim 4
Dependent Claim
17 words
The oxygen detector claimed in claim 2, wherein said recess is in the form of a groove.
Claim 5
Dependent Claim
18 words
The oxygen detector claimed in claim 2, wherein said recess is in the form of a circular depression.
Claim 6
Dependent Claim
35 words
The oxygen detector claimed in claims 1,2,3 or 4, wherein said N type semiconductor pellet contains, as a main constituent, titanium oxide and said P type semiconductor pellet contains, as a main constituent, chromium oxide.
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) | 1985-04-05 | 1985-10-05 | 1986-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-05 | 1989-10-05 | 1990-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-05 | 1993-10-05 | 1994-04-06 | $7700.00 | Window Closed / Lapsed |