Patent US3259840A successfully refreshed from Google Patents.
US3259840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for determining soil corrositivity
Assignee: Union Oil Company of California
•
Filing: 1962-05-04
•
Granted: 1966-07-05
•
Expires: 1982-05-04
Abstract
No abstract record available.
Inventors
- 👤 Schaschi Edward
- 👤 Glenn A Marsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:59
CPC Classifications
G; G01; G01N; G01N17/00; G01N17/02; G01N27/00; G01N27/26; G01N27/416; G01N27/49
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
THE METHOD OF DETERMINING THE CORROSIVITY OF A SOIL SAMPLE AS A FUNCTIONOF MEASURED GALVANIC CURRENT COMPRISING (A) CONTACTING A CONFINED COMMINUTED SOIL SAMPLE WITH AN UPPER ELECTRODE AND A LOWER ELECTRODE SPACED FROM EACH OTHER, SAID LOWER ELECTRODE BEING ANODIC WITH RESPECT TO SAID UPPER ELECTRODE, (B) MIXING WITH SAID CONFINED SOIL SAMPLE AN AMOUNT OF AQUEOUS LIQUID IN EXCESS OF THE AMOUNT REQUIRED TO SATURATE SAID SAMPLE, (C) DRAINING FROM SAID SAMPLE AQUEOUS LIQUID UNITL THE LEVEL THEREOF IS BELOW THAT OF THE UPPER ELECTRODE BUT ABOVE THAT OF THE LOWER ELECTRODE, AND (D) MEASURING THE GENERATED CURRENT PASSING BETWEEN SAID ELECTRODES.
Claim 2
Independent Claim
104 words
THE METHOD OF DETERMINING THE CORROSIVITY OF A SOIL SAMPLE AS A FUNCTIONOF MEASURED GALVANIC CURRENT COMPRISING (A) CONTACTING A CONFINED COMMINUTED SOIL SAMPLE WITH AN UPPER ELECTRODE AND A LOWER ELECTRODE SPACED FROM EACH OTHER, SAID LOWER ELECTRODE BEING ANODIC WITH RESPECT TO SAID UPPER ELECTRODE, (B) MIXING WITH SAID CONFINED SOIL SAMPLE AN AMOUNT OF AQUEOUS LIQUID IN EXCESS OF THE AMOUNT REQUIRED TO SATURATE SAID SAMPLE, (C) DRAINING FROM SAID SAMPLE AQUEOUS LIQUID UNITL THE LEVEL THEREOF IS BELOW THAT OF THE UPPER ELECTRODE BUT ABOVE THAT OF THE LOWER ELECTRODE, AND (D) MEASURING THE GENERATED CURRENT PASSING BETWEEN SAID ELECTRODES.
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) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |