US3294652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measurement of sulfuric acid and oleum concentration
Assignee: ConocoPhillips Co
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Filing: 1963-02-25
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Granted: 1966-12-27
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Expires: 1983-02-25
Abstract
No abstract record available.
Inventors
- 👤 William P Banks
- 👤 Jr Smith L Holt
- 👤 Richard L Every
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:18
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/4166
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A METHOD FOR MEASURING THE CONCENTRATION OF SULFURIC ACID OVER CERTAIN RANGES COMPRISING: (A) PLACING A REFERENCE ELECTRODE OF CONSTANT POTENTIAL IN ELECTROCHEMICAL COMMUNICATION WITH SAID ACID; (B) PLACING AN ELECTRODE SELECTED FROM THE GROUP CONSISTING OF A PLATINUM-PLATINUM OXIDE ELECTRODE AND A CHROMIUM CARBIDE ELECTRODE IN CONTACT WITH SAID ACID; AND (C) MEASURING THE POTENTIAL DIFFERENCE BETWEEN SAID ELECTRODE WHEN SAID POTENTIAL DIFFERENCE VARIES OVER
Claim 2
Independent Claim
66 words
A METHOD FOR MEASURING THE CONCENTRATION OF SULFURIC ACID OVER CERTAIN RANGES COMPRISING: (A) PLACING A REFERENCE ELECTRODE OF CONSTANT POTENTIAL IN ELECTROCHEMICAL COMMUNICATION WITH SAID ACID; (B) PLACING AN ELECTRODE SELECTED FROM THE GROUP CONSISTING OF A PLATINUM-PLATINUM OXIDE ELECTRODE AND A CHROMIUM CARBIDE ELECTRODE IN CONTACT WITH SAID ACID; AND (C) MEASURING THE POTENTIAL DIFFERENCE BETWEEN SAID ELECTRODE WHEN SAID POTENTIAL DIFFERENCE VARIES OVER
References Cited (Backward Citations)
US2930967A
Cited
US2912367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |