Patent US3835009A successfully refreshed from Google Patents.
US3835009A
Expired / Lapsed
US
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Fe-1173 electro-chemical sensor and activating method therefor
Assignee: Texas Instruments Inc
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Filing: 1973-07-30
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Granted: 1974-09-10
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Expires: 1993-07-30
Abstract
Abstract THE DISCLOSURE RELATES TO ELECTRO-CHEMICAL SENSORS FOR SENSING GASEOUS NITROGEN DIOXIDE IN THE PRESENCE OF CARBON MONOXIDE, OXYGEN, NITROGEN, SULFUR DIOXIDE, NITRIC OXIDE AND METHANE AND IN CHEMICALLY COMPATIBLE MIXTURES OF THESE GASES AS WELL AS CAPABLE OF SENSING GASEOUS MATERIALS WHICH ARE MORE STRONGLY OXIDIZING THAN NO2, THE SENSOR BEING FORMED FROM AN ACTIVATED NON-POROUS FE-1173 GLASS. AIR OXIDIZING THE FE-1173 GLASS FOR 3 MINUTES AT 300*C. ACTIVATES THE GLASS FOR IMPROVED SENSING OF GASEOUS NITROGEN DIOXIDE.
Inventors
- 👤 G Barna
- 👤 R Jasinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:52
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |