US3326044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Humidity indicating device
Assignee: Individual
•
Filing: 1965-10-21
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Granted: 1967-06-20
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Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 Frank L Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:14
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/56; G01N25/62; G01N25/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A HUMIDITY INDICATING DEVICE INCLUDING IN COMBINATION FIRST AND SECOND RESISTANCE ELEMENTS, MOISTURE ABSORBENT WICK-LIKE MATERIAL WRAPPED AROUND SAID FIRST RESISTANCE ELEMENT TO PROVIDE A FILM OF MOISTURE WHICH CAN CONTINUOUSLY EVAPORATE, MEANS FOR MEASURING THE DIFFERENCE IN RESISTANCE BETWEEN SAID FIRST AND SECOND RESISTANCE ELEMENTS, AND EACH OF SAID RESISTANCE ELEMENTS HAVING A RESISTANCE VERSUS TEMPERATURE COEFFICIENT WHICH VARIES AS A FUNCTION OF AMBIENT TEMPERATURE AT THE SAME RATE AS THE DIFFERENCE BETWEEN WET AND DRY BULB TEMPERATURE VARIES WITH VARIATIONS IN AMBIENT TEMPERATURE.
Claim 2
Dependent Claim
85 words
A HUMIDITY INDICATING DEVICE INCLUDING IN COMBINATION FIRST AND SECOND RESISTANCE ELEMENTS, MOISTURE ABSORBENT WICK-LIKE MATERIAL WRAPPED AROUND SAID FIRST RESISTANCE ELEMENT TO PROVIDE A FILM OF MOISTURE WHICH CAN CONTINUOUSLY EVAPORATE, MEANS FOR MEASURING THE DIFFERENCE IN RESISTANCE BETWEEN SAID FIRST AND SECOND RESISTANCE ELEMENTS, AND EACH OF SAID RESISTANCE ELEMENTS HAVING A RESISTANCE VERSUS TEMPERATURE COEFFICIENT WHICH VARIES AS A FUNCTION OF AMBIENT TEMPERATURE AT THE SAME RATE AS THE DIFFERENCE BETWEEN WET AND DRY BULB TEMPERATURE VARIES WITH VARIATIONS IN AMBIENT TEMPERATURE.
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) | 1970-06-19 | 1970-12-19 | 1971-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-19 | 1974-12-19 | 1975-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-19 | 1978-12-19 | 1979-06-20 | $7700.00 | Window Closed / Lapsed |