Patent US3878080A successfully refreshed from Google Patents.
US3878080A
Expired / Lapsed
US
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Carbon monoxide sensor
Assignee: Honeywell Inc
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Filing: 1974-09-09
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Granted: 1975-04-15
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Expires: 1994-09-09
Abstract
Abstract A novel electrochemical cell adapted to be used in determining the concentration of small quantities of carbon monoxide in a fluid medium by an oxygen-depletion method is disclosed in which oxygen is transported into the cell through a quantity of a stable hemeprotein compound which, at normal ambient temperatures, is capable of reversibly binding molecular oxygen but preferentially binds molecular carbon monoxide, thus reducing the oxygen transported to the cell.
Inventors
- 👤 James R Luck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:27
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/404; G01N27/4045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
The electrical chemical cell of claim 1, wherein said stable hemeprotein compound is an iron complex.
Claim 2
Dependent Claim
29 words
The electrical chemical cell of claim 2 wherein said stable hemeprotein is characterized by a central iron (II) atom within a modified porphyrin ring and complexed with a 1-methylimidazole.
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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |