Patent US5536473A successfully refreshed from Google Patents.
US5536473A
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Polyaniline gas sensor
Assignee: Transco PLC
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Filing: 1994-01-13
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Granted: 1996-07-16
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Expires: 2014-01-13
Abstract
Abstract A gas sensor for use in monitoring gases such as H 2 S, NO 2 or SO 2 comprises a film or layer of non-protonated polyaniline as the gas sensing material.
Inventors
- 👤 Andrew P. Monkman
- 👤 Michael C. Petty
- 👤 Napoleon E. Agbor
- 👤 Margaret T. Scully
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:19
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12; G01N27/125; G01N27/126; Y; Y10; Y10T; Y10T436/00; Y10T436/17; Y10T436/177692; Y10T436/179228
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
31 words
A gas sensor comprising a film or layer of non-protonated polyaniline as the gas sensing material, in which the non-protonated polyaniline is in the base emeraldine form having the formula: ##STR3##
Claim 2
Dependent Claim
31 words
A gas sensor comprising a film or layer of non-protonated polyaniline as the gas sensing material, in which the non-protonated polyaniline is in the base emeraldine form having the formula: ##STR3##
Claim 3
Dependent Claim
31 words
A gas sensor comprising a film or layer of non-protonated polyaniline as the gas sensing material, in which the non-protonated polyaniline is in the base leuco-emeraldine form having the formula: ##STR4##
Claim 4
Dependent Claim
31 words
A gas sensor comprising a film or layer of non-protonated polyaniline as the gas sensing material, in which the non-protonated polyaniline is in the base leuco-emeraldine form having the formula: ##STR4##
Claim 5
Dependent Claim
35 words
A gas sensor as claimed in claim 1, in which the film or layer of non-protonated polyaniline is deposited on a substrate which supports spaced electrodes, with the film or layer bridging the spaced electrodes.
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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) | 1999-07-16 | 2000-01-15 | 2000-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-16 | 2004-01-15 | 2004-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-16 | 2008-01-15 | 2008-07-16 | $7700.00 | Window Closed / Lapsed |