US3299387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Humidity-sensitive resistor
Assignee: General Electric Co
•
Filing: 1964-12-23
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Granted: 1967-01-17
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Expires: 1984-12-23
Abstract
No abstract record available.
Inventors
- 👤 Robert A Sanford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:49
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12; G01N27/121
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A HUMIDITY-SENSITIVE RESISTOR COMPRISING: (A) A POROUS CERAMIC BODY HAVING A POROUS SURFACE AND A MODIFYING COMPOUND FROM THE GROUP CONSISTING OF LEAD SULFIDE, LEAD SELENIDE AND LEAD TELLURIDE, SAID COMPOND DISTRIBUTED HOMOGENEOUSLY THROUGHOUT SAID CERAMIC BODY, AND (B) FIRST AND SECOND ELECTRODES ELECTRICALLY CONNECTED TO SAID POROUS CERAMIC BODY.
Claim 2
Dependent Claim
50 words
A HUMIDITY-SENSITIVE RESISTOR COMPRISING: (A) A POROUS CERAMIC BODY HAVING A POROUS SURFACE AND A MODIFYING COMPOUND FROM THE GROUP CONSISTING OF LEAD SULFIDE, LEAD SELENIDE AND LEAD TELLURIDE, SAID COMPOND DISTRIBUTED HOMOGENEOUSLY THROUGHOUT SAID CERAMIC BODY, AND (B) FIRST AND SECOND ELECTRODES ELECTRICALLY CONNECTED TO SAID POROUS CERAMIC BODY.
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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) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |