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US4352286A
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Combustible gas detecting element
Assignee: Panasonic Holdings Corp
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Filing: 1980-11-19
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Granted: 1982-10-05
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Expires: 2000-11-19
Abstract
Abstract There is provided a novel combustible gas detecting element and method for production thereof. The element comprises a gas sensing body comprising a sintered body or film of an amorphous semiconductor comprising a metal oxide, a sulfate and halide.
Inventors
- 👤 Yoshihiko Nakatani
- 👤 Masayuki Sakai
- 👤 Seiichi Nakatani
- 👤 Michio Matsuoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:24
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
28 words
A combustible gas detecting element comprising a gas sensing body comprising a sintered body or film of an amorphous semiconductor comprising a metal oxide, a sulfate and halide.
Claim 2
Dependent Claim
28 words
A combustible gas detecting element comprising a gas sensing body comprising a sintered body or film of an amorphous semiconductor comprising a metal oxide, a sulfate and halide.
Claim 3
Dependent Claim
18 words
The combustible gas detecting element according to claim 1, wherein said metal oxide is mainly composed of iron.
Claim 4
Dependent Claim
41 words
The combustible gas detecting element according to claim 1, wherein said metal element is composed of at least 50 percent of iron and the remainder of at least one compound selected from the group consisting of copper, zinc, tin and indium.
Claim 5
Dependent Claim
14 words
The combustible gas detecting element according to claim 1, further including a hydroxyl group.
Claim 6
Dependent Claim
16 words
The combustible gas detecting element according to claim 1 wherein said halide is chloride or fluoride.
Claim 7
Dependent Claim
25 words
The combustible gas detecting element according to claim 1 wherein said amorphous semiconductor comprises Fe--O--(SO 4 , OH, Cl) or Fe--O--(SO 4 , OH, F).
Claim 8
Dependent Claim
27 words
The combustible gas detecting element according to claim 6 which further includes at least one compound selected from the group consisting of copper, indium, tin an zinc.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-04 | 1986-04-05 | 1986-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-04 | 1990-04-05 | 1990-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-04 | 1994-04-05 | 1994-10-05 | $7700.00 | Window Closed / Lapsed |