US3440372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum oxide humidity sensor
Assignee: Texas Instruments Inc
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Filing: 1966-03-31
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Granted: 1969-04-22
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Expires: 1986-03-31
Abstract
No abstract record available.
Inventors
- 👤 Olin B Cecil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:54
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12; G01N27/121
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A HUMIDITY SENSOR COMPRISING A BODY OF POROUS ALUMINUM OXIDE HAVING CONDUCTIVE ELECTRODES ON OPPOSING FACES THEREOF, AT LEAST ONE OF THE ELECTRODES BEING PERVIOUS TO WATER VAPOR WHEREBY EQUILIBRIUM CAN BE MAINTAINED BETWEEN WATER IN THE PORES OF THE BODY OF POROUS
Claim 2
Dependent Claim
43 words
A HUMIDITY SENSOR COMPRISING A BODY OF POROUS ALUMINUM OXIDE HAVING CONDUCTIVE ELECTRODES ON OPPOSING FACES THEREOF, AT LEAST ONE OF THE ELECTRODES BEING PERVIOUS TO WATER VAPOR WHEREBY EQUILIBRIUM CAN BE MAINTAINED BETWEEN WATER IN THE PORES OF THE BODY OF POROUS
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) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |