US2722586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric hygroscope
Assignee: Arthur D Little Inc
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Filing: 1951-11-24
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Granted: 1955-11-01
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Expires: 1971-11-24
Abstract
No abstract record available.
Inventors
- 👤 Stearns Thornton
- 👤 Walter J Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:35
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12; G01N27/121
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A HUMIDITY RESPONSIVE DEVICE COMPRISING AN ELECTRICALLY NON-CONDUCTING, NON-HYGROSCOPIC SUPPORT, SPACED ELECTRICAL CONDUCTORS, AND A THIN MOISTURE SENSITIVE FILM COATED ON SAID SUPPORT, THE ELECTRICAL RESISTANCE OF SAID FILM BEING RESPONSIVE TO HUMIDITY CHANGES, SAID FILM BEING SUBSTANTIALLY FREE OF ELECTROLYTES AND COMPRISING FINELY DIVIDED, EVENLY DISPERSED ELECTRICALY CONDUCTIVE MATERIAL THROUGHOUT A HUMIDITY RESPONSIVE BINDER AND IN CONTACT WITH SAID CONDUCTORS AND WITH THE MOISTURE OF THE AMBIENT ATMOSPHERE.
Claim 2
Dependent Claim
69 words
A HUMIDITY RESPONSIVE DEVICE COMPRISING AN ELECTRICALLY NON-CONDUCTING, NON-HYGROSCOPIC SUPPORT, SPACED ELECTRICAL CONDUCTORS, AND A THIN MOISTURE SENSITIVE FILM COATED ON SAID SUPPORT, THE ELECTRICAL RESISTANCE OF SAID FILM BEING RESPONSIVE TO HUMIDITY CHANGES, SAID FILM BEING SUBSTANTIALLY FREE OF ELECTROLYTES AND COMPRISING FINELY DIVIDED, EVENLY DISPERSED ELECTRICALY CONDUCTIVE MATERIAL THROUGHOUT A HUMIDITY RESPONSIVE BINDER AND IN CONTACT WITH SAID CONDUCTORS AND WITH THE MOISTURE OF THE AMBIENT ATMOSPHERE.
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) | 1958-10-31 | 1959-05-02 | 1959-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-31 | 1963-05-02 | 1963-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-31 | 1967-05-02 | 1967-11-01 | $7700.00 | Window Closed / Lapsed |