US5536473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyaniline gas sensor
Assignee: Transco PLC
•
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 09:07
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.
References Cited (Backward Citations)
US4025704A
Cited
US4226692A
Cited
US4338281A
Cited
US4569826A
Cited
US4940640A
Cited
US5079334A
Cited
US5159031A
Cited
US5164465A
Cited
US5208301A
Cited
US4984446A
Cited
US5109070A
Cited
US5250170A
Cited
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 |