US2740032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric hygrometer
Assignee: Individual
•
Filing: 1954-04-08
•
Granted: 1956-03-27
•
Expires: 1974-04-08
Abstract
No abstract record available.
Inventors
- 👤 George J Bouyoucos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:45
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12; G01N27/121
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
IN AN ELECTRICAL RESISTANCE APPARATUS FOR MEASURING SOIL MOISTURE CONTENT, AN IMPROVED ADSORPTION UNIT COMPRISING A PLASTER BLOCK IMPREGNATED WITH A SUBSTANTIALLY WATER INSOLUBLE BUT WATER ABSORPTIVE RESIN, SAID BLOCK HAVING EMBEDDED THEREIN A DUAL ELECTRODE SYSTEM.
Claim 2
Dependent Claim
37 words
IN AN ELECTRICAL RESISTANCE APPARATUS FOR MEASURING SOIL MOISTURE CONTENT, AN IMPROVED ADSORPTION UNIT COMPRISING A PLASTER BLOCK IMPREGNATED WITH A SUBSTANTIALLY WATER INSOLUBLE BUT WATER ABSORPTIVE RESIN, SAID BLOCK HAVING EMBEDDED THEREIN A DUAL ELECTRODE SYSTEM.
References Cited (Backward Citations)
US2636962A
Cited
US2367561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |