US3301057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Humidity sensing element
Assignee: Johnson Controls International Inc
•
Filing: 1964-05-12
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Granted: 1967-01-31
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Expires: 1984-05-12
Abstract
No abstract record available.
Inventors
- 👤 Walter J Smith
- 👤 Rienzi B Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:44
CPC Classifications
G; G01; G01N; G01N19/00; G01N19/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A SYNTHETIC HUMIDITY SENSING ELEMENT, COMPRISING A CORE OF A SUBSTANTIALLY 100% ESTERIFIED CELLULOSE ESTER IN WHICH THE ESTERIFYING ACIDS CONTAIN UP TO 8 CARBON ATOMS, AND AN OUTER LAYER OF REGENERATED CELLULOSE BONDED TO THE CORE, SAID ELEMENT BEING PRODUCED BY HYDROLYZING A SURFACE OF THE CORE TO PROVIDE SAID REGENERATED CELLULOSE OUTER LAYER, SAID CELLULOSE BEING HIGHLY SENSITIVE TO MOISTURE CONDITIONS AND INCREASING IN DIMENSION WITH INCREASES IN RELATIVE HUMIDITY AND SAID CORE TENDING TO RESIST THE INCREASE IN DIMENSION OF SAID CELLULOSE OUTER LAYER AND PREVENTING A PERMANENT DEFORMATION OF SAID CELLULOSE LAYER.
Claim 2
Dependent Claim
96 words
A SYNTHETIC HUMIDITY SENSING ELEMENT, COMPRISING A CORE OF A SUBSTANTIALLY 100% ESTERIFIED CELLULOSE ESTER IN WHICH THE ESTERIFYING ACIDS CONTAIN UP TO 8 CARBON ATOMS, AND AN OUTER LAYER OF REGENERATED CELLULOSE BONDED TO THE CORE, SAID ELEMENT BEING PRODUCED BY HYDROLYZING A SURFACE OF THE CORE TO PROVIDE SAID REGENERATED CELLULOSE OUTER LAYER, SAID CELLULOSE BEING HIGHLY SENSITIVE TO MOISTURE CONDITIONS AND INCREASING IN DIMENSION WITH INCREASES IN RELATIVE HUMIDITY AND SAID CORE TENDING TO RESIST THE INCREASE IN DIMENSION OF SAID CELLULOSE OUTER LAYER AND PREVENTING A PERMANENT DEFORMATION OF SAID CELLULOSE LAYER.
References Cited (Backward Citations)
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Cited
US1920502A
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US2093767A
Cited
US2286710A
Cited
US2315600A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |