Patent US2604382A successfully refreshed from Google Patents.
US2604382A
Expired / Lapsed
US
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Method for testing and analyzing the condition of soil
Assignee: Individual
•
Filing: 1947-12-20
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Granted: 1952-07-22
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Expires: 1967-12-20
Abstract
No abstract record available.
Inventors
- 👤 Clarence M Woodruff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:59
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/24; G01N27/00; G01N27/26; G01N27/416; G01N27/4166; G01N27/4167
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
THE METHOD OF DETERMINING THE AMOUNT OF EXCHANGEABLE HYDROGEN IONS IN SAMPLE OF SOIL AND THEREBY DETERMINING THE LIME REQUIRMENTS OF SUCH SOILS THAT COMPRISES PREPARING A SOLUTION WHICH CONSISTS ESSENTIALLY OF PARANITROPHENOL AND CALCIUM ACETATE ADDING PH-REGULTING IONS UNTIL THE PH OF SAID SOLUTION REACHES A VALUE OF ABOUT SEVEN, ADMIXING SAID SOLUTION WITH A SAMPLE OF SOIL SO THE CALCIUM IONS OF SAID SOLUTION CAN REPLACE THE EXCHANGEABLE HYDROGEN IONS OF THE SOIL AND MEASURING THE PH VALUE OF THE RESULTING SOLUTION TO DETERMINE THE CHANGE IN PH VALUE DUE TO THE REPLACEMENT OF HE EXCHANGEBLE HYDROGEN IONS OF THE SOIL BY THE SAID CALCIUM IONS.
Claim 2
Independent Claim
108 words
THE METHOD OF DETERMINING THE AMOUNT OF EXCHANGEABLE HYDROGEN IONS IN SAMPLE OF SOIL AND THEREBY DETERMINING THE LIME REQUIRMENTS OF SUCH SOILS THAT COMPRISES PREPARING A SOLUTION WHICH CONSISTS ESSENTIALLY OF PARANITROPHENOL AND CALCIUM ACETATE ADDING PH-REGULTING IONS UNTIL THE PH OF SAID SOLUTION REACHES A VALUE OF ABOUT SEVEN, ADMIXING SAID SOLUTION WITH A SAMPLE OF SOIL SO THE CALCIUM IONS OF SAID SOLUTION CAN REPLACE THE EXCHANGEABLE HYDROGEN IONS OF THE SOIL AND MEASURING THE PH VALUE OF THE RESULTING SOLUTION TO DETERMINE THE CHANGE IN PH VALUE DUE TO THE REPLACEMENT OF HE EXCHANGEBLE HYDROGEN IONS OF THE SOIL BY THE SAID CALCIUM IONS.
References Cited (Backward Citations)
US1520891A
Cited
US2099298A
Cited
US1783559A
Cited
US2178550A
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US1929292A
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US2232211A
Cited
US2367949A
Cited
US2385471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |