US3077774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Humidity indicating device
Assignee: Energy Kontrols Inc
•
Filing: 1957-02-18
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Granted: 1963-02-19
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Expires: 1977-02-18
Abstract
No abstract record available.
Inventors
- 👤 Oran T Mcilvaine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:08
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12; G01N27/121
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
114 words
A HUMIDITY SENSING INDICATING DEVICE COMPRISING AN ENVELOPE HAVING MEANS FOR MOUNTING A LIGHT SOURCE AND A RESISTOR THEREIN, A PAIR OF PLUGS CONNECTED WITH THE ENVELOPE ADAPTED TO BE CONNECTED WITH A POWER SUPPLY, A MOISTURE RESPONSIVE ELEMENT CAPABLE OF TRANSMITTING AN INDUCED ELECTRIC FLOW RESPONSIVE TO MOISTURE ON THE SURFACE THEREOF AND A PAIR OF PLUGS ATTACHED TO THE MOISTURE RESPONSIVE ELEMENT, A PAIR OF SOCKETS ATTACHED TO THE ENVELOPE RECEIVING THE LAST-MENTIONED PAIR OF PLUGS AND MEANS CONNECTING THE FIRST-MENTIONED PAIR OF PLUGS AND THE RESISTOR AND LIGHT SOURCE MOUNTING MEANS IN AN ELECTRIC CIRCUIT WITH THE MOISTURE RESPONSIVE ELEMENT WHEN THE PLUGS ON THE LATTER ARE ENGAGED WITH THE SOCKETS.
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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) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |