US2937524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyelectrolyte water-indicating devices
Assignee: New York University
•
Filing: 1956-09-17
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Granted: 1960-05-24
•
Expires: 1976-09-17
Abstract
No abstract record available.
Inventors
- 👤 Gregor Harry Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:08
CPC Classifications
G; G01; G01N; G01N19/00; G01N19/10; G01N27/00; G01N27/02; G01N27/04; G01N27/12; G01N27/121
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A HUMIDITY SENSING DEVICE THAT COMPRISES A HYDROPHILIC HUMIDITY-DETECTOR ELEMENT COMPRISING A SUBSTANTIALLY UNIFORM MASS OF A WATER-INSOLUBLIZED POLYMERIC ELECTROLYTE HAVING DISTRIBUTED UNIFORMLY THERETHROUGH A SUFFICIENT CONCENTRATION OF IONICALLY ACTIVE GROUPS SUCH AS TO BE CAPABLE OF ABSORBING WATER READILY AND PRODUCING A PHYSICAL CHANGE WITHIN THE ELECTROLYTE IN PROPORTION TO THE AMOUNT OF WATER ABSORBED THEREBY, AND MEANS COUPLED
Claim 2
Dependent Claim
60 words
A HUMIDITY SENSING DEVICE THAT COMPRISES A HYDROPHILIC HUMIDITY-DETECTOR ELEMENT COMPRISING A SUBSTANTIALLY UNIFORM MASS OF A WATER-INSOLUBLIZED POLYMERIC ELECTROLYTE HAVING DISTRIBUTED UNIFORMLY THERETHROUGH A SUFFICIENT CONCENTRATION OF IONICALLY ACTIVE GROUPS SUCH AS TO BE CAPABLE OF ABSORBING WATER READILY AND PRODUCING A PHYSICAL CHANGE WITHIN THE ELECTROLYTE IN PROPORTION TO THE AMOUNT OF WATER ABSORBED THEREBY, AND MEANS COUPLED
References Cited (Backward Citations)
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Cited
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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) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |